Adding upstream version 2.10.34.upstream/2.10.34upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

20 files changed, 6605 insertions, 0 deletions

diff --git a/plug-ins/map-object/Makefile.am b/plug-ins/map-object/Makefile.am
new file mode 100644
index 0000000..b78b18b
--- /dev/null
+++ b/plug-ins/map-object/Makefile.am
@@ -0,0 +1,65 @@
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+
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+
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+
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+endif
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+
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+
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+	arcball.c		\
+	arcball.h		\
+	map-object-apply.c	\
+	map-object-apply.h	\
+	map-object-image.c	\
+	map-object-image.h	\
+	map-object-main.c	\
+	map-object-main.h	\
+	map-object-preview.c	\
+	map-object-preview.h	\
+	map-object-shade.c	\
+	map-object-shade.h	\
+	map-object-stock.c	\
+	map-object-stock.h	\
+	map-object-ui.c		\
+	map-object-ui.h
+
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+	$(libgimpui)		\
+	$(libgimpwidgets)	\
+	$(libgimpconfig)	\
+	$(libgimp)		\
+	$(libgimpcolor)		\
+	$(libgimpmath)		\
+	$(libgimpbase)		\
+	$(GTK_LIBS)		\
+	$(GEGL_LIBS)		\
+	$(RT_LIBS)		\
+	$(INTLLIBS)		\
+	$(map_object_RC)
diff --git a/plug-ins/map-object/Makefile.in b/plug-ins/map-object/Makefile.in
new file mode 100644
index 0000000..b006121
--- /dev/null
+++ b/plug-ins/map-object/Makefile.in
@@ -0,0 +1,1046 @@
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(PROGRAMS)
+installdirs:
+	for dir in "$(DESTDIR)$(libexecdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libexecPROGRAMS clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-am
+		-rm -f ./$(DEPDIR)/arcball.Po
+	-rm -f ./$(DEPDIR)/map-object-apply.Po
+	-rm -f ./$(DEPDIR)/map-object-image.Po
+	-rm -f ./$(DEPDIR)/map-object-main.Po
+	-rm -f ./$(DEPDIR)/map-object-preview.Po
+	-rm -f ./$(DEPDIR)/map-object-shade.Po
+	-rm -f ./$(DEPDIR)/map-object-stock.Po
+	-rm -f ./$(DEPDIR)/map-object-ui.Po
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libexecPROGRAMS
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+		-rm -f ./$(DEPDIR)/arcball.Po
+	-rm -f ./$(DEPDIR)/map-object-apply.Po
+	-rm -f ./$(DEPDIR)/map-object-image.Po
+	-rm -f ./$(DEPDIR)/map-object-main.Po
+	-rm -f ./$(DEPDIR)/map-object-preview.Po
+	-rm -f ./$(DEPDIR)/map-object-shade.Po
+	-rm -f ./$(DEPDIR)/map-object-stock.Po
+	-rm -f ./$(DEPDIR)/map-object-ui.Po
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libexecPROGRAMS
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS TAGS all all-am am--depfiles check check-am clean \
+	clean-generic clean-libexecPROGRAMS clean-libtool \
+	cscopelist-am ctags ctags-am distclean distclean-compile \
+	distclean-generic distclean-libtool distclean-tags distdir dvi \
+	dvi-am html html-am info info-am install install-am \
+	install-data install-data-am install-dvi install-dvi-am \
+	install-exec install-exec-am install-html install-html-am \
+	install-info install-info-am install-libexecPROGRAMS \
+	install-man install-pdf install-pdf-am install-ps \
+	install-ps-am install-strip installcheck installcheck-am \
+	installdirs maintainer-clean maintainer-clean-generic \
+	mostlyclean mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool pdf pdf-am ps ps-am tags tags-am uninstall \
+	uninstall-am uninstall-libexecPROGRAMS
+
+.PRECIOUS: Makefile
+
+
+# `windres` seems a very stupid tool and it breaks with double shlashes
+# in parameter paths. Strengthen the rule a little.
+@HAVE_WINDRES_TRUE@%.rc.o:
+@HAVE_WINDRES_TRUE@	$(WINDRES) --define ORIGINALFILENAME_STR="$*$(EXEEXT)" \
+@HAVE_WINDRES_TRUE@		--define INTERNALNAME_STR="$*" \
+@HAVE_WINDRES_TRUE@		--define TOP_SRCDIR="`echo $(top_srcdir) | sed 's*//*/*'`" \
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_srcdir)/app | sed 's%/\+%/%'`" \
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_builddir)/app | sed 's%/\+%/%'`"\
+@HAVE_WINDRES_TRUE@		-I"`echo $(top_builddir) | sed 's%/\+%/%'`"\
+@HAVE_WINDRES_TRUE@		$(GIMPPLUGINRC) $@
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/plug-ins/map-object/README b/plug-ins/map-object/README
new file mode 100644
index 0000000..6c6e228
--- /dev/null
+++ b/plug-ins/map-object/README
@@ -0,0 +1,61 @@
+
+MapObject 1.2.0 -- image filter plug-in for GIMP
+===========================================================
+
+Copyright (C) 1996-98 Tom Bech
+Copyright (C) 1996-98 Federico Mena Quintero
+
+Released 16th of July, 1998
+
+You can reach the author(s) via E-mail:
+tomb@gimp.org (Tom) or quartic@gimp.org (Federico).
+
+GIMP was developed by Peter Mattis and Spencer Kimball.
+You can contact them at gimp@xcf.berkeley.edu.
+
+There's more GIMP stuff on our home pages:
+http://www.ii.uib.no/~tomb/gimp.html (Tom's page)
+http://www.nuclecu.unam.mx/~federico/gimp/index.html (Quartic's page)
+
+Legal stuff
+===========
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 3 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+In other words, you can't sue us for whatever happens while using this ;)
+
+Compiling
+=========
+
+To compile you'll need GIMP 1.0 and GTK+ 1.0.4 or later.
+You'll also need GCK 1.00 (http://www.ii.uib.no/~tomb/gck.html)
+
+1) Edit the Makefile to reflect your system setup.
+
+2) Type "make" and then "make install"
+
+You should now be ready to run. "make install" puts the executable "MapObject"
+in the standard plug-in directory.
+
+Documentation
+=============
+
+Ahem.. right.. ;) ..I'll get around to it eventually.
+
+Please send me a mail if you find any bugs.
+
+Have fun,
+
+Tom
+
diff --git a/plug-ins/map-object/TODO b/plug-ins/map-object/TODO
new file mode 100644
index 0000000..fc9b41c
--- /dev/null
+++ b/plug-ins/map-object/TODO
@@ -0,0 +1,18 @@
+
+The MapObject plug-in "todo"-list:
+=================================
+
+* Interactive positioning of directional light
+* Rotation by mouse (doesn't work correctly yet and is disabled).
+* Faster mapping code
+* Multiple light-sources
+* More objects?
+* Presets (including save/load)
+* Gray-scale/channels support
+* Documentation
+* Autoconf/automake stuff?
+
+If there's anything you would like to add, feel free
+to send me any suggestions for new stuff or improvements.
+
+Tom
diff --git a/plug-ins/map-object/arcball.c b/plug-ins/map-object/arcball.c
new file mode 100644
index 0000000..1f509d4
--- /dev/null
+++ b/plug-ins/map-object/arcball.c
@@ -0,0 +1,515 @@
+/************************************/
+/* ArcBall.c (c) Ken Shoemake, 1993 */
+/* Modified by Tom Bech, 1996       */
+/************************************/
+
+#include "config.h"
+
+#include <libgimp/gimp.h>
+
+#include "arcball.h"
+
+/* Global variables */
+/* ================ */
+
+Quat qOne = { 0, 0, 0, 1 };
+
+static HVect         center;
+static double        radius;
+static Quat          qNow, qDown, qDrag;
+static HVect         vNow, vDown, vFrom, vTo, vrFrom, vrTo;
+static HMatrix       mNow, mDown;
+static unsigned int  showResult, dragging;
+static ConstraintSet sets[NSets];
+static int           setSizes[NSets];
+static AxisSet       axisSet;
+static int           axisIndex;
+
+static HMatrix mId =
+{
+  { 1, 0, 0, 0 },
+  { 0, 1, 0, 0 },
+  { 0, 0, 1, 0 },
+  { 0, 0, 0, 1 }
+};
+
+static double otherAxis[][4] =
+{
+  {-0.48, 0.80, 0.36, 1}
+};
+
+/* Internal methods */
+/* ================ */
+
+static void     Qt_ToMatrix(Quat q,HMatrix out);
+static Quat     Qt_Conj(Quat q);
+static Quat     Qt_Mul(Quat qL, Quat qR);
+static Quat     Qt_FromBallPoints(HVect from, HVect to);
+static void     Qt_ToBallPoints(Quat q, HVect *arcFrom, HVect *arcTo);
+
+static HVect    V3_(double x, double y, double z);
+static double   V3_Norm(HVect v);
+static HVect    V3_Unit(HVect v);
+static HVect    V3_Scale(HVect v, double s);
+static HVect    V3_Negate(HVect v);
+/*
+static HVect    V3_Add(HVect v1, HVect v2);
+*/
+static HVect    V3_Sub(HVect v1, HVect v2);
+static double   V3_Dot(HVect v1, HVect v2);
+/*
+static HVect    V3_Cross(HVect v1, HVect v2);
+static HVect    V3_Bisect(HVect v0, HVect v1);
+*/
+
+static HVect    MouseOnSphere(HVect mouse, HVect ballCenter, double ballRadius);
+static HVect    ConstrainToAxis(HVect loose, HVect axis);
+static int      NearestConstraintAxis(HVect loose, HVect *axes, int nAxes);
+
+/* Establish reasonable initial values for controller. */
+/* =================================================== */
+
+void
+ArcBall_Init (void)
+{
+  int i;
+
+  center = qOne;
+  radius = 1.0;
+  vDown = vNow = qOne;
+  qDown = qNow = qOne;
+  for (i=15; i>=0; i--)
+    ((double *)mNow)[i] = ((double *)mDown)[i] = ((double *)mId)[i];
+
+  showResult = dragging = FALSE;
+  axisSet = NoAxes;
+  sets[CameraAxes] = mId[X];
+  setSizes[CameraAxes] = 3;
+  sets[BodyAxes] = mDown[X];
+  setSizes[BodyAxes] = 3;
+  sets[OtherAxes] = otherAxis[X];
+  setSizes[OtherAxes] = 1;
+}
+
+/* Set the center and size of the controller. */
+/* ========================================== */
+
+void
+ArcBall_Place (HVect  Center,
+               double Radius)
+{
+  center = Center;
+  radius = Radius;
+}
+
+/* Incorporate new mouse position. */
+/* =============================== */
+
+void
+ArcBall_Mouse (HVect v_Now)
+{
+  vNow = v_Now;
+}
+
+/* Choose a constraint set, or none. */
+/* ================================= */
+
+void
+ArcBall_UseSet (AxisSet axis_Set)
+{
+  if (!dragging) axisSet = axis_Set;
+}
+
+/* Using vDown, vNow, dragging, and axisSet, compute rotation etc. */
+/* =============================================================== */
+
+void
+ArcBall_Update (void)
+{
+  int setSize = setSizes[axisSet];
+  HVect *set = (HVect *)(sets[axisSet]);
+
+  vFrom = MouseOnSphere(vDown, center, radius);
+  vTo = MouseOnSphere(vNow, center, radius);
+  if (dragging)
+    {
+      if (axisSet!=NoAxes)
+        {
+          vFrom = ConstrainToAxis(vFrom, set[axisIndex]);
+          vTo = ConstrainToAxis(vTo, set[axisIndex]);
+        }
+      qDrag = Qt_FromBallPoints(vFrom, vTo);
+      qNow = Qt_Mul(qDrag, qDown);
+    }
+  else
+    {
+      if (axisSet!=NoAxes) axisIndex = NearestConstraintAxis(vTo, set, setSize);
+    }
+  Qt_ToBallPoints(qDown, &vrFrom, &vrTo);
+  Qt_ToMatrix(Qt_Conj(qNow), mNow); /* Gives transpose for GL. */
+}
+
+/* Return rotation matrix defined by controller use. */
+/* ================================================= */
+
+void
+ArcBall_Value (HMatrix m_Now)
+{
+  ArcBall_CopyMat (mNow, m_Now);
+}
+
+/* Extract rotation angles from matrix */
+/* =================================== */
+
+void
+ArcBall_Values (double *alpha,
+                double *beta,
+                double *gamma)
+{
+  if ((*beta=asin(-mNow[0][2]))!=0.0)
+    {
+      *gamma=atan2(mNow[1][2],mNow[2][2]);
+      *alpha=atan2(mNow[0][1],mNow[0][0]);
+    }
+  else
+    {
+      *gamma=atan2(mNow[1][0],mNow[1][1]);
+      *alpha=0.0;
+    }
+}
+
+/* Begin drag sequence. */
+/* ==================== */
+
+void
+ArcBall_BeginDrag (void)
+{
+  dragging = TRUE;
+  vDown = vNow;
+}
+
+/* Stop drag sequence. */
+/* =================== */
+
+void
+ArcBall_EndDrag (void)
+{
+  dragging = FALSE;
+  qDown = qNow;
+
+  ArcBall_CopyMat (mNow, mDown);
+}
+
+/*===================*/
+/***** BallAux.c *****/
+/*===================*/
+
+/* Return quaternion product qL * qR.  Note: order is important! */
+/* To combine rotations, use the product Mul(qSecond, qFirst),   */
+/* which gives the effect of rotating by qFirst then qSecond.    */
+/* ============================================================= */
+
+static Quat
+Qt_Mul (Quat qL,
+        Quat qR)
+{
+  Quat qq;
+  qq.w = qL.w*qR.w - qL.x*qR.x - qL.y*qR.y - qL.z*qR.z;
+  qq.x = qL.w*qR.x + qL.x*qR.w + qL.y*qR.z - qL.z*qR.y;
+  qq.y = qL.w*qR.y + qL.y*qR.w + qL.z*qR.x - qL.x*qR.z;
+  qq.z = qL.w*qR.z + qL.z*qR.w + qL.x*qR.y - qL.y*qR.x;
+  return (qq);
+}
+
+/* Construct rotation matrix from (possibly non-unit) quaternion. */
+/* Assumes matrix is used to multiply column vector on the left:  */
+/* vnew = mat vold.  Works correctly for right-handed coordinate  */
+/* system and right-handed rotations.                             */
+/* ============================================================== */
+
+static void
+Qt_ToMatrix (Quat    q,
+             HMatrix out)
+{
+  double Nq = q.x*q.x + q.y*q.y + q.z*q.z + q.w*q.w;
+  double s = (Nq > 0.0) ? (2.0 / Nq) : 0.0;
+  double xs = q.x*s,              ys = q.y*s,          zs = q.z*s;
+  double wx = q.w*xs,              wy = q.w*ys,          wz = q.w*zs;
+  double xx = q.x*xs,              xy = q.x*ys,          xz = q.x*zs;
+  double yy = q.y*ys,              yz = q.y*zs,          zz = q.z*zs;
+  out[X][X] = 1.0 - (yy + zz); out[Y][X] = xy + wz; out[Z][X] = xz - wy;
+  out[X][Y] = xy - wz; out[Y][Y] = 1.0 - (xx + zz); out[Z][Y] = yz + wx;
+  out[X][Z] = xz + wy; out[Y][Z] = yz - wx; out[Z][Z] = 1.0 - (xx + yy);
+  out[X][W] = out[Y][W] = out[Z][W] = out[W][X] = out[W][Y] = out[W][Z] = 0.0;
+  out[W][W] = 1.0;
+}
+
+/* Return conjugate of quaternion. */
+/* =============================== */
+
+static Quat
+Qt_Conj (Quat q)
+{
+  Quat qq;
+  qq.x = -q.x; qq.y = -q.y; qq.z = -q.z; qq.w = q.w;
+  return (qq);
+}
+
+/* Return vector formed from components */
+/* ==================================== */
+
+static HVect
+V3_ (double x,
+     double y,
+     double z)
+{
+  HVect v;
+  v.x = x; v.y = y; v.z = z; v.w = 0;
+  return (v);
+}
+
+/* Return norm of v, defined as sum of squares of components */
+/* ========================================================= */
+
+static double
+V3_Norm (HVect v)
+{
+  return ( v.x*v.x + v.y*v.y + v.z*v.z );
+}
+
+/* Return unit magnitude vector in direction of v */
+/* ============================================== */
+
+static HVect
+V3_Unit (HVect v)
+{
+  static HVect u = {0, 0, 0, 0};
+  double vlen = sqrt(V3_Norm(v));
+
+  if (vlen != 0.0)
+    {
+      u.x = v.x/vlen;
+      u.y = v.y/vlen;
+      u.z = v.z/vlen;
+    }
+  return (u);
+}
+
+/* Return version of v scaled by s */
+/* =============================== */
+
+static HVect
+V3_Scale (HVect v,
+          double s)
+{
+  HVect u;
+  u.x = s*v.x; u.y = s*v.y; u.z = s*v.z; u.w = v.w;
+  return (u);
+}
+
+/* Return negative of v */
+/* ==================== */
+
+static HVect
+V3_Negate (HVect v)
+{
+  static HVect u = {0, 0, 0, 0};
+  u.x = -v.x; u.y = -v.y; u.z = -v.z;
+  return (u);
+}
+
+/* Return sum of v1 and v2 */
+/* ======================= */
+/*
+static HVect
+V3_Add (HVect v1,
+        HVect v2)
+{
+  static HVect v = {0, 0, 0, 0};
+  v.x = v1.x+v2.x; v.y = v1.y+v2.y; v.z = v1.z+v2.z;
+  return (v);
+}
+*/
+/* Return difference of v1 minus v2 */
+/* ================================ */
+
+static HVect
+V3_Sub (HVect v1,
+        HVect v2)
+{
+  static HVect v = {0, 0, 0, 0};
+  v.x = v1.x-v2.x; v.y = v1.y-v2.y; v.z = v1.z-v2.z;
+  return (v);
+}
+
+/* Halve arc between unit vectors v0 and v1. */
+/* ========================================= */
+/*
+static HVect
+V3_Bisect (HVect v0,
+           HVect v1)
+{
+  HVect v = {0, 0, 0, 0};
+  double Nv;
+
+  v = V3_Add(v0, v1);
+  Nv = V3_Norm(v);
+  if (Nv < 1.0e-5) v = V3_(0, 0, 1);
+  else v = V3_Scale(v, 1/sqrt(Nv));
+  return (v);
+}
+*/
+
+/* Return dot product of v1 and v2 */
+/* =============================== */
+
+static double
+V3_Dot (HVect v1,
+        HVect v2)
+{
+  return (v1.x*v2.x + v1.y*v2.y + v1.z*v2.z);
+}
+
+
+/* Return cross product, v1 x v2 */
+/* ============================= */
+/*
+static HVect
+V3_Cross (HVect v1,
+          HVect v2)
+{
+  static HVect v = {0, 0, 0, 0};
+  v.x = v1.y*v2.z-v1.z*v2.y;
+  v.y = v1.z*v2.x-v1.x*v2.z;
+  v.z = v1.x*v2.y-v1.y*v2.x;
+  return (v);
+}
+*/
+
+void
+ArcBall_CopyMat (HMatrix inm,
+                 HMatrix outm)
+{
+  int x=0,y=0;
+
+  for (x=0;x<4;x++)
+    {
+      for (y=0;y<4;y++)
+        {
+          outm[y][x]=inm[y][x];
+        }
+    }
+}
+
+/*=====================================================*/
+/**** BallMath.c - Essential routines for ArcBall.  ****/
+/*=====================================================*/
+
+/* Convert window coordinates to sphere coordinates. */
+/* ================================================= */
+
+static HVect
+MouseOnSphere (HVect  mouse,
+               HVect  ballCenter,
+               double ballRadius)
+{
+  HVect ballMouse;
+  register double mag;
+
+  ballMouse.x = (mouse.x - ballCenter.x) / ballRadius;
+  ballMouse.y = (mouse.y - ballCenter.y) / ballRadius;
+  mag = ballMouse.x*ballMouse.x + ballMouse.y*ballMouse.y;
+  if (mag > 1.0)
+    {
+      register double scale = 1.0/sqrt(mag);
+      ballMouse.x *= scale; ballMouse.y *= scale;
+      ballMouse.z = 0.0;
+    }
+  else ballMouse.z = sqrt(1 - mag);
+  ballMouse.w = 0.0;
+  return (ballMouse);
+}
+
+/* Construct a unit quaternion from two points on unit sphere */
+/* ========================================================== */
+
+static Quat
+Qt_FromBallPoints (HVect from,
+                   HVect to)
+{
+  Quat qu;
+  qu.x = from.y*to.z - from.z*to.y;
+  qu.y = from.z*to.x - from.x*to.z;
+  qu.z = from.x*to.y - from.y*to.x;
+  qu.w = from.x*to.x + from.y*to.y + from.z*to.z;
+  return (qu);
+}
+
+/* Convert a unit quaternion to two points on unit sphere */
+/* ====================================================== */
+
+static void
+Qt_ToBallPoints (Quat   q,
+                 HVect *arcFrom,
+                 HVect *arcTo)
+{
+  double s;
+
+  s = sqrt(q.x*q.x + q.y*q.y);
+  if (s == 0.0) *arcFrom = V3_(0.0, 1.0, 0.0);
+  else          *arcFrom = V3_(-q.y/s, q.x/s, 0.0);
+  arcTo->x = q.w*arcFrom->x - q.z*arcFrom->y;
+  arcTo->y = q.w*arcFrom->y + q.z*arcFrom->x;
+  arcTo->z = q.x*arcFrom->y - q.y*arcFrom->x;
+  if (q.w < 0.0) *arcFrom = V3_(-arcFrom->x, -arcFrom->y, 0.0);
+}
+
+/* Force sphere point to be perpendicular to axis. */
+/* =============================================== */
+
+static HVect
+ConstrainToAxis (HVect loose,
+                 HVect axis)
+{
+  HVect onPlane;
+  register double norm;
+
+  onPlane = V3_Sub(loose, V3_Scale(axis, V3_Dot(axis, loose)));
+  norm = V3_Norm(onPlane);
+  if (norm > 0.0)
+    {
+      if (onPlane.z < 0.0) onPlane = V3_Negate(onPlane);
+      return ( V3_Scale(onPlane, 1/sqrt(norm)) );
+    }
+  /* else drop through */
+  /* ================= */
+
+  if (axis.z == 1) onPlane = V3_(1.0, 0.0, 0.0);
+  else             onPlane = V3_Unit(V3_(-axis.y, axis.x, 0.0));
+  return (onPlane);
+}
+
+/* Find the index of nearest arc of axis set. */
+/* ========================================== */
+
+static int
+NearestConstraintAxis (HVect  loose,
+                       HVect *axes,
+                       int    nAxes)
+{
+  HVect onPlane;
+  register double max, dot;
+  register int i, nearest;
+  max = -1; nearest = 0;
+
+  for (i=0; i<nAxes; i++)
+    {
+      onPlane = ConstrainToAxis(loose, axes[i]);
+      dot = V3_Dot(onPlane, loose);
+      if (dot>max)
+        {
+          max = dot; nearest = i;
+        }
+    }
+  return (nearest);
+}
diff --git a/plug-ins/map-object/arcball.h b/plug-ins/map-object/arcball.h
new file mode 100644
index 0000000..f0b56ce
--- /dev/null
+++ b/plug-ins/map-object/arcball.h
@@ -0,0 +1,50 @@
+#ifndef __ARCBALL_H__
+#define __ARCBALL_H__
+
+typedef struct
+{
+  double x, y, z, w;
+} Quat;
+
+enum QuatPart
+{
+  X,
+  Y,
+  Z,
+  W,
+  QuatLen
+};
+
+typedef Quat HVect;
+
+typedef double HMatrix[QuatLen][QuatLen];
+
+typedef enum AxisSet
+{
+  NoAxes,
+  CameraAxes,
+  BodyAxes,
+  OtherAxes,
+  NSets
+} AxisSet;
+
+typedef double *ConstraintSet;
+
+extern Quat qOne;
+
+void ArcBall_Init      (void);
+void ArcBall_Place     (HVect    Center,
+                        double   Radius);
+void ArcBall_UseSet    (AxisSet  axis_Set);
+void ArcBall_Update    (void);
+void ArcBall_Value     (HMatrix  m_Now);
+void ArcBall_Values    (double  *alpha,
+                        double  *beta,
+                        double  *gamma);
+void ArcBall_BeginDrag (void);
+void ArcBall_EndDrag   (void);
+void ArcBall_Mouse     (HVect    v_Now);
+void ArcBall_CopyMat   (HMatrix  inm,
+                        HMatrix  outm);
+
+#endif /* __ARCBALL_H__ */
diff --git a/plug-ins/map-object/map-object-apply.c b/plug-ins/map-object/map-object-apply.c
new file mode 100644
index 0000000..0a2fb9b
--- /dev/null
+++ b/plug-ins/map-object/map-object-apply.c
@@ -0,0 +1,328 @@
+/******************************************************/
+/* Apply mapping and shading on the whole input image */
+/******************************************************/
+
+#include "config.h"
+
+#include <string.h>
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-main.h"
+#include "map-object-image.h"
+#include "map-object-shade.h"
+#include "map-object-apply.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+/*************/
+/* Main loop */
+/*************/
+
+gdouble       imat[4][4];
+gfloat        rotmat[16];
+static gfloat a[16], b[16];
+
+void
+init_compute (void)
+{
+  gint i;
+
+  switch (mapvals.maptype)
+    {
+      case MAP_SPHERE:
+
+        /* Rotate the equator/northpole axis */
+        /* ================================= */
+
+        gimp_vector3_set (&mapvals.firstaxis,  0.0, 0.0, -1.0);
+        gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0,  0.0);
+
+        gimp_vector3_rotate (&mapvals.firstaxis,
+                             gimp_deg_to_rad (mapvals.alpha),
+                             gimp_deg_to_rad (mapvals.beta),
+                             gimp_deg_to_rad (mapvals.gamma));
+        gimp_vector3_rotate (&mapvals.secondaxis,
+                             gimp_deg_to_rad (mapvals.alpha),
+                             gimp_deg_to_rad (mapvals.beta),
+                             gimp_deg_to_rad (mapvals.gamma));
+
+        /* Compute the 2D bounding box of the sphere spanned by the axis */
+        /* ============================================================= */
+
+        compute_bounding_box ();
+
+        get_ray_color = get_ray_color_sphere;
+
+        break;
+
+      case MAP_PLANE:
+
+        /* Rotate the plane axis */
+        /* ===================== */
+
+        gimp_vector3_set (&mapvals.firstaxis,  1.0, 0.0, 0.0);
+        gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+        gimp_vector3_set (&mapvals.normal,     0.0, 0.0, 1.0);
+
+        gimp_vector3_rotate (&mapvals.firstaxis,
+                             gimp_deg_to_rad (mapvals.alpha),
+                             gimp_deg_to_rad (mapvals.beta),
+                             gimp_deg_to_rad (mapvals.gamma));
+        gimp_vector3_rotate (&mapvals.secondaxis,
+                             gimp_deg_to_rad (mapvals.alpha),
+                             gimp_deg_to_rad (mapvals.beta),
+                             gimp_deg_to_rad (mapvals.gamma));
+
+        mapvals.normal = gimp_vector3_cross_product (&mapvals.firstaxis,
+                                                     &mapvals.secondaxis);
+
+        if (mapvals.normal.z < 0.0)
+          gimp_vector3_mul (&mapvals.normal, -1.0);
+
+        /* Initialize intersection matrix */
+        /* ============================== */
+
+        imat[0][1] = -mapvals.firstaxis.x;
+        imat[1][1] = -mapvals.firstaxis.y;
+        imat[2][1] = -mapvals.firstaxis.z;
+
+        imat[0][2] = -mapvals.secondaxis.x;
+        imat[1][2] = -mapvals.secondaxis.y;
+        imat[2][2] = -mapvals.secondaxis.z;
+
+        imat[0][3] = mapvals.position.x - mapvals.viewpoint.x;
+        imat[1][3] = mapvals.position.y - mapvals.viewpoint.y;
+        imat[2][3] = mapvals.position.z - mapvals.viewpoint.z;
+
+        get_ray_color = get_ray_color_plane;
+
+        break;
+
+      case MAP_BOX:
+        get_ray_color = get_ray_color_box;
+
+        gimp_vector3_set (&mapvals.firstaxis,  1.0, 0.0, 0.0);
+        gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+        gimp_vector3_set (&mapvals.normal,     0.0, 0.0, 1.0);
+
+        ident_mat (rotmat);
+
+        rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
+
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        rotatemat (mapvals.beta, &mapvals.secondaxis, a);
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        rotatemat (mapvals.gamma, &mapvals.normal, a);
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        /* Set up pixel regions for the box face images */
+        /* ============================================ */
+
+        for (i = 0; i < 6; i++)
+          {
+            box_drawable_ids[i] = mapvals.boxmap_id[i];
+
+            box_buffers[i] = gimp_drawable_get_buffer (box_drawable_ids[i]);
+          }
+
+        break;
+
+      case MAP_CYLINDER:
+        get_ray_color = get_ray_color_cylinder;
+
+        gimp_vector3_set (&mapvals.firstaxis,  1.0, 0.0, 0.0);
+        gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+        gimp_vector3_set (&mapvals.normal,     0.0, 0.0, 1.0);
+
+        ident_mat (rotmat);
+
+        rotatemat (mapvals.alpha, &mapvals.firstaxis, a);
+
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        rotatemat (mapvals.beta, &mapvals.secondaxis, a);
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        rotatemat (mapvals.gamma, &mapvals.normal, a);
+        matmul (a, rotmat, b);
+
+        memcpy (rotmat, b, sizeof (gfloat) * 16);
+
+        /* Set up pixel regions for the cylinder cap images */
+        /* ================================================ */
+
+        for (i = 0; i < 2; i++)
+          {
+            cylinder_drawable_ids[i] = mapvals.cylindermap_id[i];
+
+            cylinder_buffers[i] = gimp_drawable_get_buffer (cylinder_drawable_ids[i]);
+          }
+        break;
+    }
+
+  max_depth = (gint) mapvals.maxdepth;
+}
+
+static void
+render (gdouble   x,
+        gdouble   y,
+        GimpRGB  *col,
+        gpointer  data)
+{
+  GimpVector3 pos;
+
+  pos.x = x / (gdouble) width;
+  pos.y = y / (gdouble) height;
+  pos.z = 0.0;
+
+  *col = get_ray_color (&pos);
+}
+
+static void
+show_progress (gint     min,
+               gint     max,
+               gint     curr,
+               gpointer data)
+{
+  gimp_progress_update ((gdouble) curr / (gdouble) max);
+}
+
+/**************************************************/
+/* Performs map-to-sphere on the whole input image */
+/* and updates or creates a new GIMP image.       */
+/**************************************************/
+
+void
+compute_image (void)
+{
+  gint         xcount, ycount;
+  GimpRGB      color;
+  glong        progress_counter = 0;
+  GimpVector3  p;
+  gint32       new_image_id = -1;
+  gint32       new_layer_id = -1;
+  gboolean     insert_layer = FALSE;
+
+  init_compute ();
+
+  if (mapvals.create_new_image)
+    {
+      new_image_id = gimp_image_new (width, height, GIMP_RGB);
+    }
+  else
+    {
+      new_image_id = image_id;
+    }
+
+  gimp_image_undo_group_start (new_image_id);
+
+  if (mapvals.create_new_image ||
+      mapvals.create_new_layer ||
+      (mapvals.transparent_background &&
+       ! gimp_drawable_has_alpha (output_drawable_id)))
+    {
+      gchar *layername[] = {_("Map to plane"),
+                            _("Map to sphere"),
+                            _("Map to box"),
+                            _("Map to cylinder"),
+                            _("Background")};
+
+      new_layer_id = gimp_layer_new (new_image_id,
+                                     layername[mapvals.create_new_image ? 4 :
+                                               mapvals.maptype],
+                                     width, height,
+                                     mapvals.transparent_background ?
+                                     GIMP_RGBA_IMAGE :
+                                     GIMP_RGB_IMAGE,
+                                     100.0,
+                                     gimp_image_get_default_new_layer_mode (new_image_id));
+
+      insert_layer = TRUE;
+      output_drawable_id = new_layer_id;
+    }
+
+  dest_buffer = gimp_drawable_get_shadow_buffer (output_drawable_id);
+
+  switch (mapvals.maptype)
+    {
+      case MAP_PLANE:
+        gimp_progress_init (_("Map to plane"));
+        break;
+      case MAP_SPHERE:
+        gimp_progress_init (_("Map to sphere"));
+        break;
+      case MAP_BOX:
+        gimp_progress_init (_("Map to box"));
+        break;
+      case MAP_CYLINDER:
+        gimp_progress_init (_("Map to cylinder"));
+        break;
+    }
+
+  if (! mapvals.antialiasing)
+    {
+      for (ycount = 0; ycount < height; ycount++)
+        {
+          for (xcount = 0; xcount < width; xcount++)
+            {
+              p = int_to_pos (xcount, ycount);
+              color = (* get_ray_color) (&p);
+              poke (xcount, ycount, &color, NULL);
+
+              progress_counter++;
+            }
+
+          gimp_progress_update ((gdouble) progress_counter /
+                                (gdouble) maxcounter);
+        }
+    }
+  else
+    {
+      gimp_adaptive_supersample_area (0, 0,
+                                      width - 1, height - 1,
+                                      max_depth,
+                                      mapvals.pixelthreshold,
+                                      render,
+                                      NULL,
+                                      poke,
+                                      NULL,
+                                      show_progress,
+                                      NULL);
+    }
+
+  gimp_progress_update (1.0);
+
+  g_object_unref (source_buffer);
+  g_object_unref (dest_buffer);
+
+  if (insert_layer)
+    gimp_image_insert_layer (new_image_id, new_layer_id, -1, 0);
+
+  gimp_drawable_merge_shadow (output_drawable_id, TRUE);
+  gimp_drawable_update (output_drawable_id, 0, 0, width, height);
+
+  if (new_image_id != image_id)
+    {
+      gimp_display_new (new_image_id);
+      gimp_displays_flush ();
+    }
+
+  gimp_image_undo_group_end (new_image_id);
+}
diff --git a/plug-ins/map-object/map-object-apply.h b/plug-ins/map-object/map-object-apply.h
new file mode 100644
index 0000000..7b06eda
--- /dev/null
+++ b/plug-ins/map-object/map-object-apply.h
@@ -0,0 +1,10 @@
+#ifndef __MAPOBJECT_APPLY_H__
+#define __MAPOBJECT_APPLY_H__
+
+extern gdouble imat[4][4];
+extern gfloat  rotmat[16];
+
+void init_compute  (void);
+void compute_image (void);
+
+#endif  /* __MAPOBJECT_APPLY_H__ */
diff --git a/plug-ins/map-object/map-object-image.c b/plug-ins/map-object/map-object-image.c
new file mode 100644
index 0000000..1f16279
--- /dev/null
+++ b/plug-ins/map-object/map-object-image.c
@@ -0,0 +1,352 @@
+/*********************************************************/
+/* Image manipulation routines. Calls mapobject_shade.c  */
+/* functions to compute the shading of the image at each */
+/* pixel. These routines are used by the functions in    */
+/* mapobject_preview.c and mapobject_apply.c             */
+/*********************************************************/
+
+#include "config.h"
+
+#include <string.h>
+
+#include <sys/types.h>
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-main.h"
+#include "map-object-preview.h"
+#include "map-object-shade.h"
+#include "map-object-ui.h"
+#include "map-object-image.h"
+
+
+gint32      input_drawable_id;
+gint32      output_drawable_id;
+GeglBuffer *source_buffer;
+GeglBuffer *dest_buffer;
+
+gint32      box_drawable_ids[6];
+GeglBuffer *box_buffers[6];
+
+gint32      cylinder_drawable_ids[2];
+GeglBuffer *cylinder_buffers[2];
+
+guchar          *preview_rgb_data = NULL;
+gint             preview_rgb_stride;
+cairo_surface_t *preview_surface = NULL;
+
+glong    maxcounter, old_depth, max_depth;
+gint     width, height, image_id;
+GimpRGB  background;
+
+gint border_x, border_y, border_w, border_h;
+
+/******************/
+/* Implementation */
+/******************/
+
+GimpRGB
+peek (gint x,
+      gint y)
+{
+  GimpRGB color;
+
+  gegl_buffer_sample (source_buffer, x, y, NULL,
+                      &color, babl_format ("R'G'B'A double"),
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  if (! babl_format_has_alpha (gegl_buffer_get_format (source_buffer)))
+    color.a = 1.0;
+
+  return color;
+}
+
+static GimpRGB
+peek_box_image (gint image,
+                gint x,
+                gint y)
+{
+  GimpRGB color;
+
+  gegl_buffer_sample (box_buffers[image], x, y, NULL,
+                      &color, babl_format ("R'G'B'A double"),
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  if (! babl_format_has_alpha (gegl_buffer_get_format (box_buffers[image])))
+    color.a = 1.0;
+
+  return color;
+}
+
+static GimpRGB
+peek_cylinder_image (gint image,
+                     gint x,
+                     gint y)
+{
+  GimpRGB color;
+
+  gegl_buffer_sample (cylinder_buffers[image], x, y, NULL,
+                      &color, babl_format ("R'G'B'A double"),
+                      GEGL_SAMPLER_NEAREST, GEGL_ABYSS_NONE);
+
+  if (! babl_format_has_alpha (gegl_buffer_get_format (cylinder_buffers[image])))
+    color.a = 1.0;
+
+  return color;
+}
+
+void
+poke (gint      x,
+      gint      y,
+      GimpRGB  *color,
+      gpointer  user_data)
+{
+  gegl_buffer_set (dest_buffer, GEGL_RECTANGLE (x, y, 1, 1), 0,
+                   babl_format ("R'G'B'A double"), color,
+                   GEGL_AUTO_ROWSTRIDE);
+}
+
+gint
+checkbounds (gint x,
+             gint y)
+{
+  if (x < border_x ||
+      y < border_y ||
+      x >= border_x + border_w ||
+      y >= border_y + border_h)
+    return FALSE;
+  else
+    return TRUE;
+}
+
+static gint
+checkbounds_box_image (gint image,
+                       gint x,
+                       gint y)
+{
+  gint w, h;
+
+  w = gegl_buffer_get_width  (box_buffers[image]);
+  h = gegl_buffer_get_height (box_buffers[image]);
+
+  if (x < 0 || y < 0 || x >= w || y >= h)
+    return FALSE ;
+  else
+    return TRUE ;
+}
+
+static gint
+checkbounds_cylinder_image (gint image,
+                            gint x,
+                            gint y)
+{
+  gint w, h;
+
+  w = gegl_buffer_get_width  (cylinder_buffers[image]);
+  h = gegl_buffer_get_height (cylinder_buffers[image]);
+
+  if (x < 0 || y < 0 || x >= w || y >= h)
+    return FALSE;
+  else
+    return TRUE;
+}
+
+GimpVector3
+int_to_pos (gint x,
+            gint y)
+{
+  GimpVector3 pos;
+
+  pos.x = (gdouble) x / (gdouble) width;
+  pos.y = (gdouble) y / (gdouble) height;
+  pos.z = 0.0;
+
+  return pos;
+}
+
+void
+pos_to_int (gdouble  x,
+            gdouble  y,
+            gint    *scr_x,
+            gint    *scr_y)
+{
+  *scr_x = (gint) ((x * (gdouble) width));
+  *scr_y = (gint) ((y * (gdouble) height));
+}
+
+/**********************************************/
+/* Compute the image color at pos (u,v) using */
+/* Quartics bilinear interpolation stuff.     */
+/**********************************************/
+
+GimpRGB
+get_image_color (gdouble  u,
+                 gdouble  v,
+                 gint    *inside)
+{
+  gint    x1, y1, x2, y2;
+  GimpRGB p[4];
+
+  pos_to_int (u, v, &x1, &y1);
+
+  if (mapvals.tiled == TRUE)
+    {
+      *inside = TRUE;
+
+      if (x1 < 0) x1 = (width-1) - (-x1 % width);
+      else        x1 = x1 % width;
+
+      if (y1 < 0) y1 = (height-1) - (-y1 % height);
+      else        y1 = y1 % height;
+
+      x2 = (x1 + 1) % width;
+      y2 = (y1 + 1) % height;
+
+      p[0] = peek (x1, y1);
+      p[1] = peek (x2, y1);
+      p[2] = peek (x1, y2);
+      p[3] = peek (x2, y2);
+
+      return gimp_bilinear_rgba (u * width, v * height, p);
+    }
+
+  if (checkbounds (x1, y1) == FALSE)
+    {
+      *inside =FALSE;
+
+      return background;
+    }
+
+  x2 = (x1 + 1);
+  y2 = (y1 + 1);
+
+  if (checkbounds (x2, y2) == FALSE)
+   {
+     *inside = TRUE;
+
+     return peek (x1, y1);
+   }
+
+  *inside=TRUE;
+
+  p[0] = peek (x1, y1);
+  p[1] = peek (x2, y1);
+  p[2] = peek (x1, y2);
+  p[3] = peek (x2, y2);
+
+  return gimp_bilinear_rgba (u * width, v * height, p);
+}
+
+GimpRGB
+get_box_image_color (gint    image,
+                     gdouble u,
+                     gdouble v)
+{
+  gint    w, h;
+  gint    x1, y1, x2, y2;
+  GimpRGB p[4];
+
+  w = gegl_buffer_get_width  (box_buffers[image]);
+  h = gegl_buffer_get_height (box_buffers[image]);
+
+  x1 = (gint) ((u * (gdouble) w));
+  y1 = (gint) ((v * (gdouble) h));
+
+  if (checkbounds_box_image (image, x1, y1) == FALSE)
+    return background;
+
+  x2 = (x1 + 1);
+  y2 = (y1 + 1);
+
+  if (checkbounds_box_image (image, x2, y2) == FALSE)
+    return peek_box_image (image, x1,y1);
+
+  p[0] = peek_box_image (image, x1, y1);
+  p[1] = peek_box_image (image, x2, y1);
+  p[2] = peek_box_image (image, x1, y2);
+  p[3] = peek_box_image (image, x2, y2);
+
+  return gimp_bilinear_rgba (u * w, v * h, p);
+}
+
+GimpRGB
+get_cylinder_image_color (gint    image,
+                          gdouble u,
+                          gdouble v)
+{
+  gint    w, h;
+  gint    x1, y1, x2, y2;
+  GimpRGB p[4];
+
+  w = gegl_buffer_get_width  (cylinder_buffers[image]);
+  h = gegl_buffer_get_height (cylinder_buffers[image]);
+
+  x1 = (gint) ((u * (gdouble) w));
+  y1 = (gint) ((v * (gdouble) h));
+
+  if (checkbounds_cylinder_image (image, x1, y1) == FALSE)
+    return background;
+
+  x2 = (x1 + 1);
+  y2 = (y1 + 1);
+
+  if (checkbounds_cylinder_image (image, x2, y2) == FALSE)
+    return peek_cylinder_image (image, x1,y1);
+
+  p[0] = peek_cylinder_image (image, x1, y1);
+  p[1] = peek_cylinder_image (image, x2, y1);
+  p[2] = peek_cylinder_image (image, x1, y2);
+  p[3] = peek_cylinder_image (image, x2, y2);
+
+  return gimp_bilinear_rgba (u * w, v * h, p);
+}
+
+/****************************************/
+/* Allocate memory for temporary images */
+/****************************************/
+
+gint
+image_setup (gint32 drawable_id,
+             gint   interactive)
+{
+  input_drawable_id  = drawable_id;
+  output_drawable_id = drawable_id;
+
+  if (! gimp_drawable_mask_intersect (drawable_id, &border_x, &border_y,
+                                      &border_w, &border_h))
+    return FALSE;
+
+  width  = gimp_drawable_width  (input_drawable_id);
+  height = gimp_drawable_height (input_drawable_id);
+
+  source_buffer = gimp_drawable_get_buffer (input_drawable_id);
+
+  maxcounter = (glong) width * (glong) height;
+
+  if (mapvals.transparent_background == TRUE)
+    {
+      gimp_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
+    }
+  else
+    {
+      gimp_context_get_background (&background);
+      gimp_rgb_set_alpha (&background, 1.0);
+    }
+
+  if (interactive == TRUE)
+    {
+      preview_rgb_stride = cairo_format_stride_for_width (CAIRO_FORMAT_RGB24,
+                                                          PREVIEW_WIDTH);
+      preview_rgb_data = g_new0 (guchar, preview_rgb_stride * PREVIEW_HEIGHT);
+      preview_surface = cairo_image_surface_create_for_data (preview_rgb_data,
+                                                             CAIRO_FORMAT_RGB24,
+                                                             PREVIEW_WIDTH,
+                                                             PREVIEW_HEIGHT,
+                                                             preview_rgb_stride);
+    }
+
+  return TRUE;
+}
diff --git a/plug-ins/map-object/map-object-image.h b/plug-ins/map-object/map-object-image.h
new file mode 100644
index 0000000..189204b
--- /dev/null
+++ b/plug-ins/map-object/map-object-image.h
@@ -0,0 +1,62 @@
+#ifndef __MAPOBJECT_IMAGE_H__
+#define __MAPOBJECT_IMAGE_H__
+
+/* Externally visible variables */
+/* ============================ */
+
+extern gint32        input_drawable_id;
+extern gint32        output_drawable_id;
+extern GeglBuffer   *source_buffer;
+extern GeglBuffer   *dest_buffer;
+
+extern gint32        box_drawable_ids[6];
+extern GeglBuffer   *box_buffers[6];
+
+extern gint32        cylinder_drawable_ids[2];
+extern GeglBuffer   *cylinder_buffers[2];
+
+extern guchar          *preview_rgb_data;
+extern gint             preview_rgb_stride;
+extern cairo_surface_t *preview_surface;
+
+extern glong    maxcounter, old_depth, max_depth;
+extern gint     width, height, image_id;
+extern GimpRGB  background;
+
+extern gint border_x1, border_y1, border_x2, border_y2;
+
+/* Externally visible functions */
+/* ============================ */
+
+extern gint        image_setup              (gint32        drawable_id,
+                                             gint          interactive);
+extern glong       in_xy_to_index           (gint          x,
+                                             gint          y);
+extern glong       out_xy_to_index          (gint          x,
+                                             gint          y);
+extern gint        checkbounds              (gint          x,
+                                             gint          y);
+extern GimpRGB     peek                     (gint          x,
+                                             gint          y);
+extern void        poke                     (gint          x,
+                                             gint          y,
+                                             GimpRGB      *color,
+                                             gpointer      user_data);
+extern GimpVector3 int_to_pos               (gint          x,
+                                             gint          y);
+extern void        pos_to_int               (gdouble       x,
+                                             gdouble       y,
+                                             gint         *scr_x,
+                                             gint         *scr_y);
+
+extern GimpRGB     get_image_color          (gdouble      u,
+                                             gdouble      v,
+                                             gint        *inside);
+extern GimpRGB     get_box_image_color      (gint         image,
+                                             gdouble      u,
+                                             gdouble      v);
+extern GimpRGB     get_cylinder_image_color (gint         image,
+                                             gdouble      u,
+                                             gdouble      v);
+
+#endif  /* __MAPOBJECT_IMAGE_H__ */
diff --git a/plug-ins/map-object/map-object-main.c b/plug-ins/map-object/map-object-main.c
new file mode 100644
index 0000000..c2f6a82
--- /dev/null
+++ b/plug-ins/map-object/map-object-main.c
@@ -0,0 +1,334 @@
+/* MapObject 1.2.0 -- image filter plug-in for GIMP
+ *
+ * Copyright (C) 1996-98 Tom Bech
+ * Copyright (C) 1996-98 Federico Mena Quintero
+ *
+ * E-mail: tomb@gimp.org (Tom) or quartic@gimp.org (Federico)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-ui.h"
+#include "map-object-image.h"
+#include "map-object-apply.h"
+#include "map-object-preview.h"
+#include "map-object-main.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+/* Global variables */
+/* ================ */
+
+MapObjectValues mapvals;
+
+/******************/
+/* Implementation */
+/******************/
+
+/*************************************/
+/* Set parameters to standard values */
+/*************************************/
+
+static void
+set_default_settings (void)
+{
+  gint i;
+
+  gimp_vector3_set (&mapvals.viewpoint,  0.5, 0.5, 2.0);
+  gimp_vector3_set (&mapvals.firstaxis,  1.0, 0.0, 0.0);
+  gimp_vector3_set (&mapvals.secondaxis, 0.0, 1.0, 0.0);
+  gimp_vector3_set (&mapvals.normal,     0.0, 0.0, 1.0);
+  gimp_vector3_set (&mapvals.position,   0.5, 0.5, 0.0);
+  gimp_vector3_set (&mapvals.lightsource.position,  -0.5, -0.5, 2.0);
+  gimp_vector3_set (&mapvals.lightsource.direction, -1.0, -1.0, 1.0);
+  gimp_vector3_set (&mapvals.scale,      0.5, 0.5, 0.5);
+
+  mapvals.maptype = MAP_PLANE;
+
+  mapvals.pixelthreshold  = 0.25;
+  mapvals.alpha           = 0.0;
+  mapvals.beta            = 0.0;
+  mapvals.gamma           = 0.0;
+  mapvals.maxdepth        = 3.0;
+  mapvals.radius          = 0.25;
+  mapvals.cylinder_radius = 0.25;
+  mapvals.cylinder_length = 1.0;
+
+  mapvals.zoom             = 1.0;
+  mapvals.lightsource.type = POINT_LIGHT;
+
+  mapvals.antialiasing           = TRUE;
+  mapvals.create_new_image       = FALSE;
+  mapvals.create_new_layer       = FALSE;
+  mapvals.transparent_background = FALSE;
+  mapvals.tiled                  = FALSE;
+  mapvals.livepreview            = FALSE;
+  mapvals.showgrid               = TRUE;
+
+  mapvals.lightsource.intensity = 1.0;
+  gimp_rgba_set (&mapvals.lightsource.color, 1.0, 1.0, 1.0, 1.0);
+
+  mapvals.material.ambient_int  = 0.3;
+  mapvals.material.diffuse_int  = 1.0;
+  mapvals.material.diffuse_ref  = 0.5;
+  mapvals.material.specular_ref = 0.5;
+  mapvals.material.highlight    = 27.0;
+
+  for (i = 0; i < 6; i++)
+    mapvals.boxmap_id[i] = -1;
+
+  for (i = 0; i < 2; i++)
+    mapvals.cylindermap_id[i] = -1;
+}
+
+static void
+check_drawables (gint32 drawable_id)
+{
+  gint i;
+
+  /* Check that boxmap images are valid */
+  /* ================================== */
+
+  for (i = 0; i < 6; i++)
+    {
+      if (mapvals.boxmap_id[i] == -1 ||
+          !gimp_item_is_valid (mapvals.boxmap_id[i]) ||
+          gimp_drawable_is_gray (mapvals.boxmap_id[i]))
+        mapvals.boxmap_id[i] = drawable_id;
+    }
+
+  /* Check that cylindermap images are valid */
+  /* ======================================= */
+
+  for (i = 0; i < 2; i++)
+    {
+      if (mapvals.cylindermap_id[i] == -1 ||
+          !gimp_item_is_valid (mapvals.cylindermap_id[i]) ||
+          gimp_drawable_is_gray (mapvals.cylindermap_id[i]))
+        mapvals.cylindermap_id[i] = drawable_id;
+    }
+}
+
+static void
+query (void)
+{
+  static const GimpParamDef args[] =
+  {
+    { GIMP_PDB_INT32,    "run-mode",              "The run mode { RUN-INTERACTIVE (0), RUN-NONINTERACTIVE (1) }" },
+    { GIMP_PDB_IMAGE,    "image",                 "Input image" },
+    { GIMP_PDB_DRAWABLE, "drawable",              "Input drawable" },
+    { GIMP_PDB_INT32,    "maptype",               "Type of mapping (0=plane,1=sphere,2=box,3=cylinder)" },
+    { GIMP_PDB_FLOAT,    "viewpoint-x",           "Position of viewpoint (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "viewpoint-y",           "Position of viewpoint (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "viewpoint-z",           "Position of viewpoint (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "position-x",            "Object position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "position-y",            "Object position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "position-z",            "Object position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "firstaxis-x",           "First axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "firstaxis-y",           "First axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "firstaxis-z",           "First axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "secondaxis-x",          "Second axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "secondaxis-y",          "Second axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "secondaxis-z",          "Second axis of object [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "rotationangle-x",       "Rotation about X axis in degrees" },
+    { GIMP_PDB_FLOAT,    "rotationangle-y",       "Rotation about Y axis in degrees" },
+    { GIMP_PDB_FLOAT,    "rotationangle-z",       "Rotation about Z axis in degrees" },
+    { GIMP_PDB_INT32,    "lighttype",             "Type of lightsource (0=point,1=directional,2=none)" },
+    { GIMP_PDB_COLOR,    "lightcolor",            "Lightsource color (r,g,b)" },
+    { GIMP_PDB_FLOAT,    "lightposition-x",       "Lightsource position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "lightposition-y",       "Lightsource position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "lightposition-z",       "Lightsource position (x,y,z)" },
+    { GIMP_PDB_FLOAT,    "lightdirection-x",      "Lightsource direction [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "lightdirection-y",      "Lightsource direction [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "lightdirection-z",      "Lightsource direction [x,y,z]" },
+    { GIMP_PDB_FLOAT,    "ambient_intensity",     "Material ambient intensity (0..1)" },
+    { GIMP_PDB_FLOAT,    "diffuse_intensity",     "Material diffuse intensity (0..1)" },
+    { GIMP_PDB_FLOAT,    "diffuse_reflectivity",  "Material diffuse reflectivity (0..1)" },
+    { GIMP_PDB_FLOAT,    "specular_reflectivity", "Material specular reflectivity (0..1)" },
+    { GIMP_PDB_FLOAT,    "highlight",             "Material highlight (0..->), note: it's exponential" },
+    { GIMP_PDB_INT32,    "antialiasing",          "Apply antialiasing (TRUE/FALSE)" },
+    { GIMP_PDB_INT32,    "tiled",                 "Tile source image (TRUE/FALSE)" },
+    { GIMP_PDB_INT32,    "newimage",              "Create a new image (TRUE/FALSE)" },
+    { GIMP_PDB_INT32,    "transparentbackground", "Make background transparent (TRUE/FALSE)" },
+    { GIMP_PDB_FLOAT,    "radius",                "Sphere/cylinder radius (only used when maptype=1 or 3)" },
+    { GIMP_PDB_FLOAT,    "x-scale",               "Box x size (0..->)" },
+    { GIMP_PDB_FLOAT,    "y-scale",               "Box y size (0..->)" },
+    { GIMP_PDB_FLOAT,    "z-scale",               "Box z size (0..->)"},
+    { GIMP_PDB_FLOAT,    "cylinder-length",       "Cylinder length (0..->)"},
+    { GIMP_PDB_DRAWABLE, "box-front-drawable",    "Box front face (set these to -1 if not used)" },
+    { GIMP_PDB_DRAWABLE, "box-back-drawable",     "Box back face" },
+    { GIMP_PDB_DRAWABLE, "box-top-drawable",      "Box top face" },
+    { GIMP_PDB_DRAWABLE, "box-bottom-drawable",   "Box bottom face" },
+    { GIMP_PDB_DRAWABLE, "box-left-drawable",     "Box left face" },
+    { GIMP_PDB_DRAWABLE, "box-right-drawable",    "Box right face" },
+    { GIMP_PDB_DRAWABLE, "cyl-top-drawable",      "Cylinder top face (set these to -1 if not used)" },
+    { GIMP_PDB_DRAWABLE, "cyl-bottom-drawable",   "Cylinder bottom face" }
+  };
+
+  gimp_install_procedure (PLUG_IN_PROC,
+                          N_("Map the image to an object (plane, sphere, box or cylinder)"),
+                          "No help yet",
+                          "Tom Bech & Federico Mena Quintero",
+                          "Tom Bech & Federico Mena Quintero",
+                          "Version 1.2.0, July 16 1998",
+                          N_("Map _Object..."),
+                          "RGB*",
+                          GIMP_PLUGIN,
+                          G_N_ELEMENTS (args), 0,
+                          args, NULL);
+
+  gimp_plugin_menu_register (PLUG_IN_PROC, "<Image>/Filters/Map");
+}
+
+static void
+run (const gchar      *name,
+     gint              nparams,
+     const GimpParam  *param,
+     gint             *nreturn_vals,
+     GimpParam       **return_vals)
+{
+  static GimpParam   values[1];
+  GimpRunMode        run_mode;
+  gint32             drawable_id;
+  GimpPDBStatusType  status = GIMP_PDB_SUCCESS;
+  gint               i;
+
+  INIT_I18N ();
+  gegl_init (NULL, NULL);
+
+  values[0].type = GIMP_PDB_STATUS;
+  values[0].data.d_status = status;
+
+  *nreturn_vals = 1;
+  *return_vals = values;
+
+  /* Set default values */
+  /* ================== */
+
+  set_default_settings ();
+
+  /* Get the specified drawable */
+  /* ========================== */
+
+  run_mode    = param[0].data.d_int32;
+  image_id    = param[1].data.d_int32;
+  drawable_id = param[2].data.d_int32;
+
+  switch (run_mode)
+    {
+      case GIMP_RUN_INTERACTIVE:
+
+        /* Possibly retrieve data */
+        /* ====================== */
+
+        gimp_get_data (PLUG_IN_PROC, &mapvals);
+        check_drawables (drawable_id);
+        if (main_dialog (drawable_id))
+          {
+            compute_image ();
+
+            gimp_set_data (PLUG_IN_PROC, &mapvals, sizeof (MapObjectValues));
+          }
+        break;
+
+      case GIMP_RUN_WITH_LAST_VALS:
+        gimp_get_data (PLUG_IN_PROC, &mapvals);
+        check_drawables (drawable_id);
+        if (image_setup (drawable_id, FALSE))
+          compute_image ();
+        break;
+
+      case GIMP_RUN_NONINTERACTIVE:
+        if (nparams != 49)
+          {
+            status = GIMP_PDB_CALLING_ERROR;
+          }
+        else
+          {
+            mapvals.maptype                 = (MapType) param[3].data.d_int32;
+            mapvals.viewpoint.x             = param[4].data.d_float;
+            mapvals.viewpoint.y             = param[5].data.d_float;
+            mapvals.viewpoint.z             = param[6].data.d_float;
+            mapvals.position.x              = param[7].data.d_float;
+            mapvals.position.y              = param[8].data.d_float;
+            mapvals.position.z              = param[9].data.d_float;
+            mapvals.firstaxis.x             = param[10].data.d_float;
+            mapvals.firstaxis.y             = param[11].data.d_float;
+            mapvals.firstaxis.z             = param[12].data.d_float;
+            mapvals.secondaxis.x            = param[13].data.d_float;
+            mapvals.secondaxis.y            = param[14].data.d_float;
+            mapvals.secondaxis.z            = param[15].data.d_float;
+            mapvals.alpha                   = param[16].data.d_float;
+            mapvals.beta                    = param[17].data.d_float;
+            mapvals.gamma                   = param[18].data.d_float;
+            mapvals.lightsource.type        = (LightType) param[19].data.d_int32;
+            mapvals.lightsource.color       = param[20].data.d_color;
+            mapvals.lightsource.position.x  = param[21].data.d_float;
+            mapvals.lightsource.position.y  = param[22].data.d_float;
+            mapvals.lightsource.position.z  = param[23].data.d_float;
+            mapvals.lightsource.direction.x = param[24].data.d_float;
+            mapvals.lightsource.direction.y = param[25].data.d_float;
+            mapvals.lightsource.direction.z = param[26].data.d_float;
+            mapvals.material.ambient_int    = param[27].data.d_float;
+            mapvals.material.diffuse_int    = param[28].data.d_float;
+            mapvals.material.diffuse_ref    = param[29].data.d_float;
+            mapvals.material.specular_ref   = param[30].data.d_float;
+            mapvals.material.highlight      = param[31].data.d_float;
+            mapvals.antialiasing            = (gint) param[32].data.d_int32;
+            mapvals.tiled                   = (gint) param[33].data.d_int32;
+            mapvals.create_new_image        = (gint) param[34].data.d_int32;
+            mapvals.transparent_background  = (gint) param[35].data.d_int32;
+            mapvals.radius                  = param[36].data.d_float;
+            mapvals.cylinder_radius         = param[36].data.d_float;
+            mapvals.scale.x                 = param[37].data.d_float;
+            mapvals.scale.y                 = param[38].data.d_float;
+            mapvals.scale.z                 = param[39].data.d_float;
+            mapvals.cylinder_length         = param[40].data.d_float;
+
+            for (i = 0; i < 6; i++)
+              mapvals.boxmap_id[i] = param[41+i].data.d_drawable;
+
+            for (i = 0; i < 2; i++)
+              mapvals.cylindermap_id[i] = param[47+i].data.d_drawable;
+
+            check_drawables (drawable_id);
+            if (image_setup (drawable_id, FALSE))
+              compute_image ();
+          }
+        break;
+    }
+
+  values[0].data.d_status = status;
+
+  if (run_mode != GIMP_RUN_NONINTERACTIVE)
+    gimp_displays_flush ();
+}
+
+const GimpPlugInInfo PLUG_IN_INFO =
+{
+  NULL,  /* init_proc  */
+  NULL,  /* quit_proc  */
+  query, /* query_proc */
+  run,   /* run_proc   */
+};
+
+MAIN ()
diff --git a/plug-ins/map-object/map-object-main.h b/plug-ins/map-object/map-object-main.h
new file mode 100644
index 0000000..5958c7c
--- /dev/null
+++ b/plug-ins/map-object/map-object-main.h
@@ -0,0 +1,90 @@
+#ifndef __MAPOBJECT_MAIN_H__
+#define __MAPOBJECT_MAIN_H__
+
+/* Defines and stuff */
+/* ================= */
+
+#define PLUG_IN_PROC   "plug-in-map-object"
+#define PLUG_IN_BINARY "map-object"
+#define PLUG_IN_ROLE   "gimp-map-object"
+
+#define TILE_CACHE_SIZE 16
+
+/* Typedefs */
+/* ======== */
+
+typedef enum
+{
+  POINT_LIGHT,
+  DIRECTIONAL_LIGHT,
+  NO_LIGHT
+} LightType;
+
+typedef enum
+{
+  MAP_PLANE,
+  MAP_SPHERE,
+  MAP_BOX,
+  MAP_CYLINDER
+} MapType;
+
+/* Typedefs */
+/* ======== */
+
+typedef struct
+{
+  gdouble  ambient_int;
+  gdouble  diffuse_int;
+  gdouble  diffuse_ref;
+  gdouble  specular_ref;
+  gdouble  highlight;
+  GimpRGB  color;
+} MaterialSettings;
+
+typedef struct
+{
+  LightType    type;
+  GimpVector3  position;
+  GimpVector3  direction;
+  GimpRGB      color;
+  gdouble      intensity;
+} LightSettings;
+
+typedef struct
+{
+  GimpVector3   viewpoint,firstaxis,secondaxis,normal,position,scale;
+  LightSettings lightsource;
+
+  MaterialSettings material;
+  MaterialSettings refmaterial;
+
+  MapType maptype;
+
+  gint antialiasing;
+  gint create_new_image;
+  gint create_new_layer;
+  gint transparent_background;
+  gint tiled;
+  gint livepreview;
+  gint showgrid;
+  gint showcaps;
+
+  gdouble zoom;
+  gdouble alpha,beta,gamma;
+  gdouble maxdepth;
+  gdouble pixelthreshold;
+  gdouble radius;
+  gdouble cylinder_radius;
+  gdouble cylinder_length;
+
+  gint32 boxmap_id[6];
+  gint32 cylindermap_id[2];
+
+} MapObjectValues;
+
+/* Externally visible variables */
+/* ============================ */
+
+extern MapObjectValues mapvals;
+
+#endif  /* __MAPOBJECT_MAIN_H__ */
diff --git a/plug-ins/map-object/map-object-preview.c b/plug-ins/map-object/map-object-preview.c
new file mode 100644
index 0000000..afc29b4
--- /dev/null
+++ b/plug-ins/map-object/map-object-preview.c
@@ -0,0 +1,745 @@
+/*************************************************/
+/* Compute a preview image and preview wireframe */
+/*************************************************/
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-main.h"
+#include "map-object-ui.h"
+#include "map-object-image.h"
+#include "map-object-apply.h"
+#include "map-object-shade.h"
+#include "map-object-preview.h"
+
+
+gdouble mat[3][4];
+gint    lightx, lighty;
+
+/* Protos */
+/* ====== */
+
+static void compute_preview         (gint x,
+                                     gint y,
+                                     gint w,
+                                     gint h,
+                                     gint pw,
+                                     gint ph);
+static void draw_light_marker       (cairo_t *cr,
+                                     gint xpos,
+                                     gint ypos);
+static void draw_line               (cairo_t    *cr,
+                                     gint        startx,
+                                     gint        starty,
+                                     gint        pw,
+                                     gint        ph,
+                                     gdouble     cx1,
+                                     gdouble     cy1,
+                                     gdouble     cx2,
+                                     gdouble     cy2,
+                                     GimpVector3 a,
+                                     GimpVector3 b);
+static void draw_wireframe          (cairo_t *cr,
+                                     gint startx,
+                                     gint starty,
+                                     gint pw,
+                                     gint ph);
+static void draw_preview_wireframe  (cairo_t *cr);
+static void draw_wireframe_plane    (cairo_t *cr,
+                                     gint        startx,
+                                     gint        starty,
+                                     gint        pw,
+                                     gint        ph);
+static void draw_wireframe_sphere   (cairo_t *cr,
+                                     gint        startx,
+                                     gint        starty,
+                                     gint        pw,
+                                     gint        ph);
+static void draw_wireframe_box      (cairo_t *cr,
+                                     gint        startx,
+                                     gint        starty,
+                                     gint        pw,
+                                     gint        ph);
+static void draw_wireframe_cylinder (cairo_t *cr,
+                                     gint        startx,
+                                     gint        starty,
+                                     gint        pw,
+                                     gint        ph);
+
+/**************************************************************/
+/* Computes a preview of the rectangle starting at (x,y) with */
+/* dimensions (w,h), placing the result in preview_RGB_data.  */
+/**************************************************************/
+
+static void
+compute_preview (gint x,
+                 gint y,
+                 gint w,
+                 gint h,
+                 gint pw,
+                 gint ph)
+{
+  gdouble      xpostab[PREVIEW_WIDTH];
+  gdouble      ypostab[PREVIEW_HEIGHT];
+  gdouble      realw;
+  gdouble      realh;
+  GimpVector3  p1, p2;
+  GimpRGB      color;
+  GimpRGB      lightcheck, darkcheck;
+  gint         xcnt, ycnt, f1, f2;
+  guchar       r, g, b;
+  glong        index = 0;
+
+  init_compute ();
+
+  if (! preview_surface)
+    return;
+
+  p1 = int_to_pos (x, y);
+  p2 = int_to_pos (x + w, y + h);
+
+  /* First, compute the linear mapping (x,y,x+w,y+h) to (0,0,pw,ph) */
+  /* ============================================================== */
+
+  realw = (p2.x - p1.x);
+  realh = (p2.y - p1.y);
+
+  for (xcnt = 0; xcnt < pw; xcnt++)
+    xpostab[xcnt] = p1.x + realw * ((gdouble) xcnt / (gdouble) pw);
+
+  for (ycnt = 0; ycnt < ph; ycnt++)
+    ypostab[ycnt] = p1.y + realh * ((gdouble) ycnt / (gdouble) ph);
+
+  /* Compute preview using the offset tables */
+  /* ======================================= */
+
+  if (mapvals.transparent_background == TRUE)
+    {
+      gimp_rgba_set (&background, 0.0, 0.0, 0.0, 0.0);
+    }
+  else
+    {
+      gimp_context_get_background (&background);
+      gimp_rgb_set_alpha (&background, 1.0);
+    }
+
+  gimp_rgba_set (&lightcheck,
+                 GIMP_CHECK_LIGHT, GIMP_CHECK_LIGHT, GIMP_CHECK_LIGHT, 1.0);
+  gimp_rgba_set (&darkcheck,
+                 GIMP_CHECK_DARK, GIMP_CHECK_DARK, GIMP_CHECK_DARK, 1.0);
+  gimp_vector3_set (&p2, -1.0, -1.0, 0.0);
+
+  cairo_surface_flush (preview_surface);
+
+  for (ycnt = 0; ycnt < ph; ycnt++)
+    {
+      index = ycnt * preview_rgb_stride;
+      for (xcnt = 0; xcnt < pw; xcnt++)
+        {
+          p1.x = xpostab[xcnt];
+          p1.y = ypostab[ycnt];
+
+          p2 = p1;
+          color = (* get_ray_color) (&p1);
+
+          if (color.a < 1.0)
+            {
+              f1 = ((xcnt % 32) < 16);
+              f2 = ((ycnt % 32) < 16);
+              f1 = f1 ^ f2;
+
+              if (f1)
+                {
+                  if (color.a == 0.0)
+                    color = lightcheck;
+                  else
+                    gimp_rgb_composite (&color, &lightcheck,
+                                        GIMP_RGB_COMPOSITE_BEHIND);
+                 }
+              else
+                {
+                  if (color.a == 0.0)
+                    color = darkcheck;
+                  else
+                    gimp_rgb_composite (&color, &darkcheck,
+                                        GIMP_RGB_COMPOSITE_BEHIND);
+                }
+            }
+
+          gimp_rgb_get_uchar (&color, &r, &g, &b);
+          GIMP_CAIRO_RGB24_SET_PIXEL((preview_rgb_data + index), r, g, b);
+          index += 4;
+        }
+    }
+  cairo_surface_mark_dirty (preview_surface);
+}
+
+/*************************************************/
+/* Check if the given position is within the     */
+/* light marker. Return TRUE if so, FALSE if not */
+/*************************************************/
+
+gint
+check_light_hit (gint xpos,
+                 gint ypos)
+{
+  gdouble dx, dy, r;
+
+  if (mapvals.lightsource.type == POINT_LIGHT)
+    {
+      dx = (gdouble) lightx - xpos;
+      dy = (gdouble) lighty - ypos;
+      r  = sqrt (dx * dx + dy * dy) + 0.5;
+
+      if ((gint) r > 7)
+        return FALSE;
+      else
+        return TRUE;
+    }
+
+  return FALSE;
+}
+
+/****************************************/
+/* Draw a marker to show light position */
+/****************************************/
+
+static void
+draw_light_marker (cairo_t *cr,
+                   gint xpos,
+                   gint ypos)
+{
+  GdkColor color;
+
+  if (mapvals.lightsource.type != POINT_LIGHT)
+    return;
+
+  cairo_set_line_width (cr, 1.0);
+
+  color.red   = 0x0;
+  color.green = 0x4000;
+  color.blue  = 0xFFFF;
+  gdk_cairo_set_source_color (cr, &color);
+
+  lightx = xpos;
+  lighty = ypos;
+
+  cairo_arc (cr, lightx, lighty, 7, 0, 2 * G_PI);
+  cairo_fill (cr);
+}
+
+static void
+draw_lights (cairo_t *cr,
+             gint startx,
+             gint starty,
+             gint pw,
+             gint ph)
+{
+  gdouble dxpos, dypos;
+  gint    xpos, ypos;
+
+  gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                        &dxpos, &dypos, &mapvals.viewpoint,
+                        &mapvals.lightsource.position);
+  xpos = RINT (dxpos);
+  ypos = RINT (dypos);
+
+  if (xpos >= 0 && xpos <= PREVIEW_WIDTH &&
+      ypos >= 0 && ypos <= PREVIEW_HEIGHT)
+    {
+      draw_light_marker (cr, xpos, ypos);
+    }
+}
+
+/*************************************************/
+/* Update light position given new screen coords */
+/*************************************************/
+
+void
+update_light (gint xpos,
+              gint ypos)
+{
+  gint    startx, starty, pw, ph;
+
+  pw     = PREVIEW_WIDTH * mapvals.zoom;
+  ph     = PREVIEW_HEIGHT * mapvals.zoom;
+  startx = (PREVIEW_WIDTH  - pw) / 2;
+  starty = (PREVIEW_HEIGHT - ph) / 2;
+
+  gimp_vector_2d_to_3d (startx, starty, pw, ph, xpos, ypos,
+                        &mapvals.viewpoint, &mapvals.lightsource.position);
+
+  gtk_widget_queue_draw (previewarea);
+}
+
+/**************************/
+/* Compute preview image. */
+/**************************/
+
+void
+compute_preview_image (void)
+{
+  GdkDisplay *display = gtk_widget_get_display (previewarea);
+  GdkCursor  *cursor;
+  gint        pw, ph;
+
+  pw = PREVIEW_WIDTH * mapvals.zoom;
+  ph = PREVIEW_HEIGHT * mapvals.zoom;
+
+  cursor = gdk_cursor_new_for_display (display, GDK_WATCH);
+  gdk_window_set_cursor (gtk_widget_get_window (previewarea), cursor);
+  gdk_cursor_unref (cursor);
+
+  compute_preview (0, 0, width - 1, height - 1, pw, ph);
+
+  cursor = gdk_cursor_new_for_display (display, GDK_HAND2);
+  gdk_window_set_cursor(gtk_widget_get_window (previewarea), cursor);
+  gdk_cursor_unref (cursor);
+}
+
+gboolean
+preview_expose (GtkWidget      *widget,
+                GdkEventExpose *eevent)
+{
+  gint startx, starty, pw, ph;
+  cairo_t *cr;
+
+  cr = gdk_cairo_create (eevent->window);
+
+  pw = PREVIEW_WIDTH * mapvals.zoom;
+  ph = PREVIEW_HEIGHT * mapvals.zoom;
+  startx = (PREVIEW_WIDTH - pw) / 2;
+  starty = (PREVIEW_HEIGHT - ph) / 2;
+
+  cairo_set_source_surface (cr, preview_surface, startx, starty);
+  cairo_rectangle (cr, startx, starty, pw, ph);
+  cairo_clip (cr);
+
+  cairo_paint (cr);
+
+  cairo_reset_clip (cr);
+
+  if (mapvals.showgrid)
+    draw_preview_wireframe (cr);
+
+  cairo_reset_clip (cr);
+  draw_lights (cr, startx, starty, pw, ph);
+
+  cairo_destroy (cr);
+
+  return FALSE;
+}
+
+/**************************/
+/* Draw preview wireframe */
+/**************************/
+
+void
+draw_preview_wireframe (cairo_t *cr)
+{
+  gint      startx, starty, pw, ph;
+
+  pw     = PREVIEW_WIDTH  * mapvals.zoom;
+  ph     = PREVIEW_HEIGHT * mapvals.zoom;
+  startx = (PREVIEW_WIDTH  - pw) / 2;
+  starty = (PREVIEW_HEIGHT - ph) / 2;
+
+  draw_wireframe (cr, startx, starty, pw, ph);
+}
+
+/****************************/
+/* Draw a wireframe preview */
+/****************************/
+
+void
+draw_wireframe (cairo_t *cr,
+                gint startx,
+                gint starty,
+                gint pw,
+                gint ph)
+{
+  cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+  switch (mapvals.maptype)
+    {
+    case MAP_PLANE:
+      draw_wireframe_plane (cr, startx, starty, pw, ph);
+      break;
+    case MAP_SPHERE:
+      draw_wireframe_sphere (cr, startx, starty, pw, ph);
+      break;
+    case MAP_BOX:
+      draw_wireframe_box (cr, startx, starty, pw, ph);
+      break;
+    case MAP_CYLINDER:
+      draw_wireframe_cylinder (cr, startx, starty, pw, ph);
+      break;
+    }
+}
+
+static void
+draw_wireframe_plane (cairo_t *cr,
+                      gint startx,
+                      gint starty,
+                      gint pw,
+                      gint ph)
+{
+  GimpVector3 v1, v2, a, b, c, d, dir1, dir2;
+  gint        cnt;
+  gdouble     x1, y1, x2, y2, fac;
+
+  cairo_rectangle (cr, startx, starty, pw, ph);
+  cairo_clip (cr);
+
+  /* Find rotated box corners */
+  /* ======================== */
+
+  gimp_vector3_set (&v1, 0.5, 0.0, 0.0);
+  gimp_vector3_set (&v2, 0.0, 0.5, 0.0);
+
+  gimp_vector3_rotate (&v1,
+                       gimp_deg_to_rad (mapvals.alpha),
+                       gimp_deg_to_rad (mapvals.beta),
+                       gimp_deg_to_rad (mapvals.gamma));
+
+  gimp_vector3_rotate (&v2,
+                       gimp_deg_to_rad (mapvals.alpha),
+                       gimp_deg_to_rad (mapvals.beta),
+                       gimp_deg_to_rad (mapvals.gamma));
+
+  dir1 = v1; gimp_vector3_normalize (&dir1);
+  dir2 = v2; gimp_vector3_normalize (&dir2);
+
+  fac = 1.0 / (gdouble) WIRESIZE;
+
+  gimp_vector3_mul (&dir1, fac);
+  gimp_vector3_mul (&dir2, fac);
+
+  gimp_vector3_add (&a, &mapvals.position, &v1);
+  gimp_vector3_sub (&b, &a, &v2);
+  gimp_vector3_add (&a, &a, &v2);
+  gimp_vector3_sub (&d, &mapvals.position, &v1);
+  gimp_vector3_sub (&d, &d, &v2);
+
+  c = b;
+
+  for (cnt = 0; cnt <= WIRESIZE; cnt++)
+    {
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x1, &y1, &mapvals.viewpoint, &a);
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x2, &y2, &mapvals.viewpoint, &b);
+
+      cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
+      cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
+
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x1, &y1, &mapvals.viewpoint, &c);
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x2, &y2, &mapvals.viewpoint, &d);
+
+      cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
+      cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
+
+      gimp_vector3_sub (&a, &a, &dir1);
+      gimp_vector3_sub (&b, &b, &dir1);
+      gimp_vector3_add (&c, &c, &dir2);
+      gimp_vector3_add (&d, &d, &dir2);
+    }
+
+  cairo_set_line_width (cr, 3.0);
+  cairo_stroke_preserve (cr);
+  cairo_set_line_width (cr, 1.0);
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+  cairo_stroke (cr);
+}
+
+static void
+draw_wireframe_sphere (cairo_t *cr,
+                       gint startx,
+                       gint starty,
+                       gint pw,
+                       gint ph)
+{
+  GimpVector3 p[2 * (WIRESIZE + 5)];
+  gint        cnt, cnt2;
+  gdouble     x1, y1, x2, y2, twopifac;
+
+  cairo_rectangle (cr, startx, starty, pw, ph);
+  cairo_clip (cr);
+
+  /* Compute wireframe points */
+  /* ======================== */
+
+  twopifac = (2.0 * G_PI) / WIRESIZE;
+
+  for (cnt = 0; cnt < WIRESIZE; cnt++)
+    {
+      p[cnt].x = mapvals.radius * cos ((gdouble) cnt * twopifac);
+      p[cnt].y = 0.0;
+      p[cnt].z = mapvals.radius * sin ((gdouble) cnt * twopifac);
+      gimp_vector3_rotate (&p[cnt],
+                           gimp_deg_to_rad (mapvals.alpha),
+                           gimp_deg_to_rad (mapvals.beta),
+                           gimp_deg_to_rad (mapvals.gamma));
+      gimp_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
+    }
+
+  p[cnt] = p[0];
+
+  for (cnt = WIRESIZE + 1; cnt < 2 * WIRESIZE + 1; cnt++)
+    {
+      p[cnt].x = mapvals.radius * cos ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
+      p[cnt].y = mapvals.radius * sin ((gdouble) (cnt-(WIRESIZE+1))*twopifac);
+      p[cnt].z = 0.0;
+      gimp_vector3_rotate (&p[cnt],
+                           gimp_deg_to_rad (mapvals.alpha),
+                           gimp_deg_to_rad (mapvals.beta),
+                           gimp_deg_to_rad (mapvals.gamma));
+      gimp_vector3_add (&p[cnt], &p[cnt], &mapvals.position);
+    }
+
+  p[cnt] = p[WIRESIZE+1];
+  cnt++;
+  cnt2 = cnt;
+
+  /* Find rotated axis */
+  /* ================= */
+
+  gimp_vector3_set (&p[cnt], 0.0, -0.35, 0.0);
+  gimp_vector3_rotate (&p[cnt],
+                       gimp_deg_to_rad (mapvals.alpha),
+                       gimp_deg_to_rad (mapvals.beta),
+                       gimp_deg_to_rad (mapvals.gamma));
+  p[cnt+1] = mapvals.position;
+
+  gimp_vector3_set (&p[cnt+2], 0.0, 0.0, -0.35);
+  gimp_vector3_rotate (&p[cnt+2],
+                       gimp_deg_to_rad (mapvals.alpha),
+                       gimp_deg_to_rad (mapvals.beta),
+                       gimp_deg_to_rad (mapvals.gamma));
+  p[cnt+3] = mapvals.position;
+
+  p[cnt + 4] = p[cnt];
+  gimp_vector3_mul (&p[cnt + 4], -1.0);
+  p[cnt + 5] = p[cnt + 1];
+
+  gimp_vector3_add (&p[cnt],     &p[cnt],     &mapvals.position);
+  gimp_vector3_add (&p[cnt + 2], &p[cnt + 2], &mapvals.position);
+  gimp_vector3_add (&p[cnt + 4], &p[cnt + 4], &mapvals.position);
+
+  /* Draw the circles (equator and zero meridian) */
+  /* ============================================ */
+
+  for (cnt = 0; cnt < cnt2 - 1; cnt++)
+    {
+      if (p[cnt].z > mapvals.position.z && p[cnt + 1].z > mapvals.position.z)
+        {
+          gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                                &x1, &y1, &mapvals.viewpoint, &p[cnt]);
+          gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                                &x2, &y2, &mapvals.viewpoint, &p[cnt + 1]);
+
+          cairo_move_to (cr, (gint) (x1 + 0.5) + 0.5, (gint) (y1 + 0.5) + 0.5);
+          cairo_line_to (cr, (gint) (x2 + 0.5) + 0.5, (gint) (y2 + 0.5) + 0.5);
+        }
+    }
+
+  /* Draw the axis (pole to pole and center to zero meridian) */
+  /* ======================================================== */
+
+  for (cnt = 0; cnt < 3; cnt++)
+    {
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x1, &y1, &mapvals.viewpoint, &p[cnt2]);
+      gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                            &x2, &y2, &mapvals.viewpoint, &p[cnt2 + 1]);
+
+      cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
+      cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
+
+      cnt2 += 2;
+    }
+
+  cairo_set_line_width (cr, 3.0);
+  cairo_stroke_preserve (cr);
+  cairo_set_line_width (cr, 1.0);
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+  cairo_stroke (cr);
+}
+
+static void
+draw_line (cairo_t    *cr,
+           gint        startx,
+           gint        starty,
+           gint        pw,
+           gint        ph,
+           gdouble     cx1,
+           gdouble     cy1,
+           gdouble     cx2,
+           gdouble     cy2,
+           GimpVector3 a,
+           GimpVector3 b)
+{
+  gdouble x1, y1, x2, y2;
+
+  gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                        &x1, &y1, &mapvals.viewpoint, &a);
+  gimp_vector_3d_to_2d (startx, starty, pw, ph,
+                        &x2, &y2, &mapvals.viewpoint, &b);
+
+  cairo_move_to (cr, RINT (x1) + 0.5, RINT (y1) + 0.5);
+  cairo_line_to (cr, RINT (x2) + 0.5, RINT (y2) + 0.5);
+}
+
+static void
+draw_wireframe_box (cairo_t *cr,
+                    gint startx,
+                    gint starty,
+                    gint pw,
+                    gint ph)
+{
+  GimpVector3 p[8], tmp, scale;
+  gint        i;
+  gdouble     cx1, cy1, cx2, cy2;
+
+  cairo_rectangle (cr, startx, starty, pw, ph);
+  cairo_clip (cr);
+
+  /* Compute wireframe points */
+  /* ======================== */
+
+  init_compute ();
+
+  scale = mapvals.scale;
+  gimp_vector3_mul (&scale, 0.5);
+
+  gimp_vector3_set (&p[0], -scale.x, -scale.y, scale.z);
+  gimp_vector3_set (&p[1],  scale.x, -scale.y, scale.z);
+  gimp_vector3_set (&p[2],  scale.x,  scale.y, scale.z);
+  gimp_vector3_set (&p[3], -scale.x,  scale.y, scale.z);
+
+  gimp_vector3_set (&p[4], -scale.x, -scale.y, -scale.z);
+  gimp_vector3_set (&p[5],  scale.x, -scale.y, -scale.z);
+  gimp_vector3_set (&p[6],  scale.x,  scale.y, -scale.z);
+  gimp_vector3_set (&p[7], -scale.x,  scale.y, -scale.z);
+
+  /* Rotate and translate points */
+  /* =========================== */
+
+  for (i = 0; i < 8; i++)
+    {
+      vecmulmat (&tmp, &p[i], rotmat);
+      gimp_vector3_add (&p[i], &tmp, &mapvals.position);
+    }
+
+  /* Draw the box */
+  /* ============ */
+
+  cx1 = (gdouble) startx;
+  cy1 = (gdouble) starty;
+  cx2 = cx1 + (gdouble) pw;
+  cy2 = cy1 + (gdouble) ph;
+
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[1]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[2]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[3]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[0]);
+
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[4],p[5]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[5],p[6]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[6],p[7]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[4]);
+
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[0],p[4]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[1],p[5]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[2],p[6]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[3],p[7]);
+
+  cairo_set_line_width (cr, 3.0);
+  cairo_stroke_preserve (cr);
+  cairo_set_line_width (cr, 1.0);
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+  cairo_stroke (cr);
+}
+
+static void
+draw_wireframe_cylinder (cairo_t *cr,
+                         gint startx,
+                         gint starty,
+                         gint pw,
+                         gint ph)
+{
+  GimpVector3 p[2*8], a, axis, scale;
+  gint        i;
+  gdouble     cx1, cy1, cx2, cy2;
+  gfloat      m[16], l, angle;
+
+  cairo_rectangle (cr, startx, starty, pw, ph);
+  cairo_clip (cr);
+
+  /* Compute wireframe points */
+  /* ======================== */
+
+  init_compute ();
+
+  scale = mapvals.scale;
+  gimp_vector3_mul (&scale, 0.5);
+
+  l = mapvals.cylinder_length / 2.0;
+  angle = 0;
+
+  gimp_vector3_set (&axis, 0.0, 1.0, 0.0);
+
+  for (i = 0; i < 8; i++)
+    {
+      rotatemat (angle, &axis, m);
+
+      gimp_vector3_set (&a, mapvals.cylinder_radius, 0.0, 0.0);
+
+      vecmulmat (&p[i], &a, m);
+
+      p[i+8] = p[i];
+
+      p[i].y   += l;
+      p[i+8].y -= l;
+
+      angle += 360.0 / 8.0;
+    }
+
+  /* Rotate and translate points */
+  /* =========================== */
+
+  for (i = 0; i < 16; i++)
+    {
+      vecmulmat (&a, &p[i], rotmat);
+      gimp_vector3_add (&p[i], &a, &mapvals.position);
+    }
+
+  /* Draw the box */
+  /* ============ */
+
+  cx1 = (gdouble) startx;
+  cy1 = (gdouble) starty;
+  cx2 = cx1 + (gdouble) pw;
+  cy2 = cy1 + (gdouble) ph;
+
+  for (i = 0; i < 7; i++)
+    {
+      draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+1]);
+      draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i+8],p[i+9]);
+      draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[i],p[i+8]);
+    }
+
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[7],p[0]);
+  draw_line (cr, startx,starty,pw,ph, cx1,cy1,cx2,cy2, p[15],p[8]);
+
+  cairo_set_line_width (cr, 3.0);
+  cairo_stroke_preserve (cr);
+  cairo_set_line_width (cr, 1.0);
+  cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+  cairo_stroke (cr);
+}
diff --git a/plug-ins/map-object/map-object-preview.h b/plug-ins/map-object/map-object-preview.h
new file mode 100644
index 0000000..400b767
--- /dev/null
+++ b/plug-ins/map-object/map-object-preview.h
@@ -0,0 +1,26 @@
+#ifndef __MAPOBJECT_PREVIEW_H__
+#define __MAPOBJECT_PREVIEW_H__
+
+#define PREVIEW_WIDTH 200
+#define PREVIEW_HEIGHT 200
+
+#define WIRESIZE 16
+
+/* Externally visible variables */
+/* ============================ */
+
+extern gdouble    mat[3][4];
+extern gint       lightx,lighty;
+
+/* Externally visible functions */
+/* ============================ */
+
+void     compute_preview_image  (void);
+gboolean preview_expose         (GtkWidget      *widget,
+                                 GdkEventExpose *eevent);
+gint     check_light_hit        (gint            xpos,
+                                 gint            ypos);
+void     update_light           (gint            xpos,
+                                 gint            ypos);
+
+#endif  /* __MAPOBJECT_PREVIEW_H__ */
diff --git a/plug-ins/map-object/map-object-shade.c b/plug-ins/map-object/map-object-shade.c
new file mode 100644
index 0000000..f91345b
--- /dev/null
+++ b/plug-ins/map-object/map-object-shade.c
@@ -0,0 +1,1254 @@
+/*****************/
+/* Shading stuff */
+/*****************/
+
+#include "config.h"
+
+#include <string.h>
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "map-object-apply.h"
+#include "map-object-main.h"
+#include "map-object-image.h"
+#include "map-object-shade.h"
+
+
+static gdouble     bx1, by1, bx2, by2;
+get_ray_color_func get_ray_color;
+
+typedef struct
+{
+  gdouble     u, v;
+  gdouble     t;
+  GimpVector3 s;
+  GimpVector3 n;
+  gint        face;
+} FaceIntersectInfo;
+
+/*****************/
+/* Phong shading */
+/*****************/
+
+static GimpRGB
+phong_shade (GimpVector3 *pos,
+             GimpVector3 *viewpoint,
+             GimpVector3 *normal,
+             GimpRGB     *diff_col,
+             GimpRGB     *spec_col,
+             LightType    type)
+{
+  GimpRGB       ambientcolor, diffusecolor, specularcolor;
+  gdouble      NL, RV, dist;
+  GimpVector3  L, NN, V, N;
+  GimpVector3  *light;
+
+  light = mapvals.lightsource.type == DIRECTIONAL_LIGHT
+    ? &mapvals.lightsource.direction
+    : &mapvals.lightsource.position,
+
+  /* Compute ambient intensity */
+  /* ========================= */
+
+  N = *normal;
+  ambientcolor = *diff_col;
+  gimp_rgb_multiply (&ambientcolor, mapvals.material.ambient_int);
+
+  /* Compute (N*L) term of Phong's equation */
+  /* ====================================== */
+
+  if (type == POINT_LIGHT)
+    gimp_vector3_sub (&L, light, pos);
+  else
+    L = *light;
+
+  dist = gimp_vector3_length (&L);
+
+  if (dist != 0.0)
+    gimp_vector3_mul (&L, 1.0 / dist);
+
+  NL = 2.0 * gimp_vector3_inner_product (&N, &L);
+
+  if (NL >= 0.0)
+    {
+      /* Compute (R*V)^alpha term of Phong's equation */
+      /* ============================================ */
+
+      gimp_vector3_sub (&V, viewpoint, pos);
+      gimp_vector3_normalize (&V);
+
+      gimp_vector3_mul (&N, NL);
+      gimp_vector3_sub (&NN, &N, &L);
+      RV = gimp_vector3_inner_product (&NN, &V);
+      RV = 0.0 < RV ? pow (RV, mapvals.material.highlight) : 0.0;
+
+      /* Compute diffuse and specular intensity contribution */
+      /* =================================================== */
+
+      diffusecolor = *diff_col;
+      gimp_rgb_multiply (&diffusecolor, mapvals.material.diffuse_ref);
+      gimp_rgb_multiply (&diffusecolor, NL);
+
+      specularcolor = *spec_col;
+      gimp_rgb_multiply (&specularcolor, mapvals.material.specular_ref);
+      gimp_rgb_multiply (&specularcolor, RV);
+
+      gimp_rgb_add (&diffusecolor, &specularcolor);
+      gimp_rgb_multiply (&diffusecolor, mapvals.material.diffuse_int);
+      gimp_rgb_clamp (&diffusecolor);
+
+      gimp_rgb_add (&ambientcolor, &diffusecolor);
+    }
+
+  return ambientcolor;
+}
+
+static gint
+plane_intersect (GimpVector3 *dir,
+                 GimpVector3 *viewp,
+                 GimpVector3 *ipos,
+                 gdouble     *u,
+                 gdouble     *v)
+{
+  static gdouble det, det1, det2, det3, t;
+
+  imat[0][0] = dir->x;
+  imat[1][0] = dir->y;
+  imat[2][0] = dir->z;
+
+  /* Compute determinant of the first 3x3 sub matrix (denominator) */
+  /* ============================================================= */
+
+  det = (imat[0][0] * imat[1][1] * imat[2][2] +
+         imat[0][1] * imat[1][2] * imat[2][0] +
+         imat[0][2] * imat[1][0] * imat[2][1] -
+         imat[0][2] * imat[1][1] * imat[2][0] -
+         imat[0][0] * imat[1][2] * imat[2][1] -
+         imat[2][2] * imat[0][1] * imat[1][0]);
+
+  /* If the determinant is non-zero, a intersection point exists */
+  /* =========================================================== */
+
+  if (det != 0.0)
+    {
+      /* Now, lets compute the numerator determinants (wow ;) */
+      /* ==================================================== */
+
+      det1 = (imat[0][3] * imat[1][1] * imat[2][2] +
+              imat[0][1] * imat[1][2] * imat[2][3] +
+              imat[0][2] * imat[1][3] * imat[2][1] -
+              imat[0][2] * imat[1][1] * imat[2][3] -
+              imat[1][2] * imat[2][1] * imat[0][3] -
+              imat[2][2] * imat[0][1] * imat[1][3]);
+
+      det2 = (imat[0][0] * imat[1][3] * imat[2][2] +
+              imat[0][3] * imat[1][2] * imat[2][0] +
+              imat[0][2] * imat[1][0] * imat[2][3] -
+              imat[0][2] * imat[1][3] * imat[2][0] -
+              imat[1][2] * imat[2][3] * imat[0][0] -
+              imat[2][2] * imat[0][3] * imat[1][0]);
+
+      det3 = (imat[0][0] * imat[1][1] * imat[2][3] +
+              imat[0][1] * imat[1][3] * imat[2][0] +
+              imat[0][3] * imat[1][0] * imat[2][1] -
+              imat[0][3] * imat[1][1] * imat[2][0] -
+              imat[1][3] * imat[2][1] * imat[0][0] -
+              imat[2][3] * imat[0][1] * imat[1][0]);
+
+      /* Now we have the simultaneous solutions. Lets compute the unknowns */
+      /* (skip u&v if t is <0, this means the intersection is behind us)  */
+      /* ================================================================ */
+
+      t = det1 / det;
+
+      if (t > 0.0)
+        {
+          *u = 1.0 + ((det2 / det) - 0.5);
+          *v = 1.0 + ((det3 / det) - 0.5);
+
+                ipos->x = viewp->x + t * dir->x;
+          ipos->y = viewp->y + t * dir->y;
+          ipos->z = viewp->z + t * dir->z;
+
+          return TRUE;
+        }
+    }
+
+  return FALSE;
+}
+
+/*****************************************************************************
+ * These routines computes the color of the surface
+ * of the plane at a given point
+ *****************************************************************************/
+
+GimpRGB
+get_ray_color_plane (GimpVector3 *pos)
+{
+  GimpRGB color = background;
+
+  static gint         inside = FALSE;
+  static GimpVector3  ray, spos;
+  static gdouble      vx, vy;
+
+  /* Construct a line from our VP to the point */
+  /* ========================================= */
+
+  gimp_vector3_sub (&ray, pos, &mapvals.viewpoint);
+  gimp_vector3_normalize (&ray);
+
+  /* Check for intersection. This is a quasi ray-tracer. */
+  /* =================================================== */
+
+  if (plane_intersect (&ray, &mapvals.viewpoint, &spos, &vx, &vy) == TRUE)
+    {
+      color = get_image_color (vx, vy, &inside);
+
+      if (color.a != 0.0 && inside == TRUE &&
+          mapvals.lightsource.type != NO_LIGHT)
+        {
+          /* Compute shading at this point */
+          /* ============================= */
+
+          color = phong_shade (&spos,
+                               &mapvals.viewpoint,
+                               &mapvals.normal,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+        }
+    }
+
+  if (mapvals.transparent_background == FALSE && color.a < 1.0)
+    {
+      gimp_rgb_composite (&color, &background,
+                          GIMP_RGB_COMPOSITE_BEHIND);
+    }
+
+  return color;
+}
+
+/***********************************************************************/
+/* Given the NorthPole, Equator and a third vector (normal) compute    */
+/* the conversion from spherical oordinates to image space coordinates */
+/***********************************************************************/
+
+static void
+sphere_to_image (GimpVector3 *normal,
+                 gdouble     *u,
+                 gdouble     *v)
+{
+  static gdouble      alpha, fac;
+  static GimpVector3  cross_prod;
+
+  alpha = acos (-gimp_vector3_inner_product (&mapvals.secondaxis, normal));
+
+  *v = alpha / G_PI;
+
+  if (*v == 0.0 || *v == 1.0)
+    {
+      *u = 0.0;
+    }
+  else
+    {
+      fac = (gimp_vector3_inner_product (&mapvals.firstaxis, normal) /
+             sin (alpha));
+
+      /* Make sure that we map to -1.0..1.0 (take care of rounding errors) */
+      /* ================================================================= */
+
+      fac = CLAMP (fac, -1.0, 1.0);
+
+      *u = acos (fac) / (2.0 * G_PI);
+
+      cross_prod = gimp_vector3_cross_product (&mapvals.secondaxis,
+                                               &mapvals.firstaxis);
+
+      if (gimp_vector3_inner_product (&cross_prod, normal) < 0.0)
+        *u = 1.0 - *u;
+    }
+}
+
+/***************************************************/
+/* Compute intersection point with sphere (if any) */
+/***************************************************/
+
+static gint
+sphere_intersect (GimpVector3 *dir,
+                  GimpVector3 *viewp,
+                  GimpVector3 *spos1,
+                  GimpVector3 *spos2)
+{
+  static gdouble      alpha, beta, tau, s1, s2, tmp;
+  static GimpVector3  t;
+
+  gimp_vector3_sub (&t, &mapvals.position, viewp);
+
+  alpha = gimp_vector3_inner_product (dir, &t);
+  beta  = gimp_vector3_inner_product (&t, &t);
+
+  tau = alpha * alpha - beta + mapvals.radius * mapvals.radius;
+
+  if (tau >= 0.0)
+    {
+      tau = sqrt (tau);
+      s1 = alpha + tau;
+      s2 = alpha - tau;
+
+      if (s2 < s1)
+        {
+          tmp = s1;
+          s1 = s2;
+          s2 = tmp;
+        }
+
+      spos1->x = viewp->x + s1 * dir->x;
+      spos1->y = viewp->y + s1 * dir->y;
+      spos1->z = viewp->z + s1 * dir->z;
+      spos2->x = viewp->x + s2 * dir->x;
+      spos2->y = viewp->y + s2 * dir->y;
+      spos2->z = viewp->z + s2 * dir->z;
+
+      return TRUE;
+    }
+
+  return FALSE;
+}
+
+/*****************************************************************************
+ * These routines computes the color of the surface
+ * of the sphere at a given point
+ *****************************************************************************/
+
+GimpRGB
+get_ray_color_sphere (GimpVector3 *pos)
+{
+  GimpRGB color = background;
+
+  static GimpRGB      color2;
+  static gint         inside = FALSE;
+  static GimpVector3  normal, ray, spos1, spos2;
+  static gdouble      vx, vy;
+
+  /* Check if ray is within the bounding box */
+  /* ======================================= */
+
+  if (pos->x<bx1 || pos->x>bx2 || pos->y<by1 || pos->y>by2)
+    return color;
+
+  /* Construct a line from our VP to the point */
+  /* ========================================= */
+
+  gimp_vector3_sub (&ray, pos, &mapvals.viewpoint);
+  gimp_vector3_normalize (&ray);
+
+  /* Check for intersection. This is a quasi ray-tracer. */
+  /* =================================================== */
+
+  if (sphere_intersect (&ray, &mapvals.viewpoint, &spos1, &spos2) == TRUE)
+    {
+      /* Compute spherical to rectangular mapping */
+      /* ======================================== */
+
+      gimp_vector3_sub (&normal, &spos1, &mapvals.position);
+      gimp_vector3_normalize (&normal);
+      sphere_to_image (&normal, &vx, &vy);
+      color = get_image_color (vx, vy, &inside);
+
+      /* Check for total transparency... */
+      /* =============================== */
+
+      if (color.a < 1.0)
+        {
+          /* Hey, we can see  through here!      */
+          /* Lets see what's on the other side.. */
+          /* =================================== */
+
+          color = phong_shade (&spos1,
+                               &mapvals.viewpoint,
+                               &normal,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+
+          gimp_vector3_sub (&normal, &spos2, &mapvals.position);
+          gimp_vector3_normalize (&normal);
+          sphere_to_image (&normal, &vx, &vy);
+          color2 = get_image_color (vx, vy, &inside);
+
+          /* Make the normal point inwards */
+          /* ============================= */
+
+          gimp_vector3_mul (&normal, -1.0);
+
+          color2 = phong_shade (&spos2,
+                                &mapvals.viewpoint,
+                                &normal,
+                                &color2,
+                                &mapvals.lightsource.color,
+                                mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color2);
+
+          /* Compute a mix of the first and second colors */
+          /* ============================================ */
+
+          gimp_rgb_composite (&color, &color2, GIMP_RGB_COMPOSITE_NORMAL);
+          gimp_rgb_clamp (&color);
+        }
+      else if (color.a != 0.0 &&
+               inside == TRUE &&
+               mapvals.lightsource.type != NO_LIGHT)
+        {
+          /* Compute shading at this point */
+          /* ============================= */
+
+          color = phong_shade (&spos1,
+                               &mapvals.viewpoint,
+                               &normal,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+        }
+    }
+
+  if (mapvals.transparent_background == FALSE && color.a < 1.0)
+    {
+      gimp_rgb_composite (&color, &background,
+                          GIMP_RGB_COMPOSITE_BEHIND);
+    }
+
+  return color;
+}
+
+/***************************************************/
+/* Transform the corners of the bounding box to 2D */
+/***************************************************/
+
+void
+compute_bounding_box (void)
+{
+  GimpVector3  p1, p2;
+  gdouble      t;
+  GimpVector3  dir;
+
+  p1 = mapvals.position;
+  p1.x -= (mapvals.radius + 0.01);
+  p1.y -= (mapvals.radius + 0.01);
+
+  p2 = mapvals.position;
+  p2.x += (mapvals.radius + 0.01);
+  p2.y += (mapvals.radius + 0.01);
+
+  gimp_vector3_sub (&dir, &p1, &mapvals.viewpoint);
+  gimp_vector3_normalize (&dir);
+
+  if (dir.z != 0.0)
+    {
+      t = (-1.0 * mapvals.viewpoint.z) / dir.z;
+      p1.x = (mapvals.viewpoint.x + t * dir.x);
+      p1.y = (mapvals.viewpoint.y + t * dir.y);
+    }
+
+  gimp_vector3_sub (&dir, &p2, &mapvals.viewpoint);
+  gimp_vector3_normalize (&dir);
+
+  if (dir.z != 0.0)
+    {
+      t = (-1.0 * mapvals.viewpoint.z) / dir.z;
+      p2.x = (mapvals.viewpoint.x + t * dir.x);
+      p2.y = (mapvals.viewpoint.y + t * dir.y);
+    }
+
+  bx1 = p1.x;
+  by1 = p1.y;
+  bx2 = p2.x;
+  by2 = p2.y;
+}
+
+/* These two were taken from the Mesa source. Mesa is written   */
+/* and is (C) by Brian Paul. vecmulmat() performs a post-mul by */
+/* a 4x4 matrix to a 1x4(3) vector. rotmat() creates a matrix   */
+/* that by post-mul will rotate a 1x4(3) vector the given angle */
+/* about the given axis.                                        */
+/* ============================================================ */
+
+void
+vecmulmat (GimpVector3 *u,
+           GimpVector3 *v,
+           gfloat       m[16])
+{
+  gfloat v0=v->x, v1=v->y, v2=v->z;
+#define M(row,col)  m[col*4+row]
+  u->x = v0 * M(0,0) + v1 * M(1,0) + v2 * M(2,0) + M(3,0);
+  u->y = v0 * M(0,1) + v1 * M(1,1) + v2 * M(2,1) + M(3,1);
+  u->z = v0 * M(0,2) + v1 * M(1,2) + v2 * M(2,2) + M(3,2);
+#undef M
+}
+
+void
+rotatemat (gfloat       angle,
+           GimpVector3 *v,
+           gfloat       m[16])
+{
+  /* This function contributed by Erich Boleyn (erich@uruk.org) */
+  gfloat mag, s, c;
+  gfloat xx, yy, zz, xy, yz, zx, xs, ys, zs, one_c;
+  gfloat IdentityMat[16];
+  gint   cnt;
+
+  s = sin (angle * (G_PI / 180.0));
+  c = cos (angle * (G_PI / 180.0));
+
+  mag = sqrt (v->x*v->x + v->y*v->y + v->z*v->z);
+
+  if (mag == 0.0)
+    {
+      /* generate an identity matrix and return */
+
+      for (cnt = 0; cnt < 16; cnt++)
+        IdentityMat[cnt] = 0.0;
+
+      IdentityMat[0]  = 1.0;
+      IdentityMat[5]  = 1.0;
+      IdentityMat[10] = 1.0;
+      IdentityMat[15] = 1.0;
+
+      memcpy (m, IdentityMat, sizeof (gfloat) * 16);
+      return;
+   }
+
+  v->x /= mag;
+  v->y /= mag;
+  v->z /= mag;
+
+#define M(row,col)  m[col*4+row]
+
+  xx = v->x * v->x;
+  yy = v->y * v->y;
+  zz = v->z * v->z;
+  xy = v->x * v->y;
+  yz = v->y * v->z;
+  zx = v->z * v->x;
+  xs = v->x * s;
+  ys = v->y * s;
+  zs = v->z * s;
+  one_c = 1.0F - c;
+
+  M(0,0) = (one_c * xx) + c;
+  M(0,1) = (one_c * xy) - zs;
+  M(0,2) = (one_c * zx) + ys;
+  M(0,3) = 0.0F;
+
+  M(1,0) = (one_c * xy) + zs;
+  M(1,1) = (one_c * yy) + c;
+  M(1,2) = (one_c * yz) - xs;
+  M(1,3) = 0.0F;
+
+  M(2,0) = (one_c * zx) - ys;
+  M(2,1) = (one_c * yz) + xs;
+  M(2,2) = (one_c * zz) + c;
+  M(2,3) = 0.0F;
+
+  M(3,0) = 0.0F;
+  M(3,1) = 0.0F;
+  M(3,2) = 0.0F;
+  M(3,3) = 1.0F;
+
+#undef M
+}
+
+/* Transpose the matrix m. If m is orthogonal (like a rotation matrix), */
+/* this is equal to the inverse of the matrix.                          */
+/* ==================================================================== */
+
+void
+transpose_mat (gfloat m[16])
+{
+  gint    i, j;
+  gfloat  t;
+
+  for (i = 0; i < 4; i++)
+    {
+      for (j = 0; j < i; j++)
+        {
+          t = m[j*4+i];
+          m[j*4+i] = m[i*4+j];
+          m[i*4+j] = t;
+        }
+    }
+}
+
+/* Compute the matrix product c=a*b */
+/* ================================ */
+
+void
+matmul (gfloat a[16],
+        gfloat b[16],
+        gfloat c[16])
+{
+  gint   i, j, k;
+  gfloat value;
+
+#define A(row,col)  a[col*4+row]
+#define B(row,col)  b[col*4+row]
+#define C(row,col)  c[col*4+row]
+
+  for (i = 0; i < 4; i++)
+    {
+      for (j = 0; j < 4; j++)
+        {
+          value = 0.0;
+
+          for (k = 0; k < 4; k++)
+            value += A(i,k) * B(k,j);
+
+          C(i,j) = value;
+        }
+    }
+
+#undef A
+#undef B
+#undef C
+}
+
+void
+ident_mat (gfloat m[16])
+{
+  gint  i, j;
+
+#define M(row,col)  m[col*4+row]
+
+  for (i = 0; i < 4; i++)
+    {
+      for (j = 0; j < 4; j++)
+        {
+          if (i == j)
+            M(i,j) = 1.0;
+          else
+            M(i,j) = 0.0;
+        }
+    }
+
+#undef M
+}
+
+static gboolean
+intersect_rect (gdouble            u,
+                gdouble            v,
+                gdouble            w,
+                GimpVector3        viewp,
+                GimpVector3        dir,
+                FaceIntersectInfo *face_info)
+{
+  gboolean result = FALSE;
+  gdouble  u2, v2;
+
+  if (dir.z!=0.0)
+    {
+      u2 = u / 2.0;
+      v2 = v / 2.0;
+
+      face_info->t = (w-viewp.z) / dir.z;
+      face_info->s.x = viewp.x + face_info->t * dir.x;
+      face_info->s.y = viewp.y + face_info->t * dir.y;
+      face_info->s.z = w;
+
+      if (face_info->s.x >= -u2 && face_info->s.x <= u2 &&
+          face_info->s.y >= -v2 && face_info->s.y <= v2)
+        {
+          face_info->u = (face_info->s.x + u2) / u;
+          face_info->v = (face_info->s.y + v2) / v;
+          result = TRUE;
+        }
+    }
+
+  return result;
+}
+
+static gboolean
+intersect_box (GimpVector3        scale,
+               GimpVector3        viewp,
+               GimpVector3        dir,
+               FaceIntersectInfo *face_intersect)
+{
+  GimpVector3        v, d, tmp, axis[3];
+  FaceIntersectInfo  face_tmp;
+  gboolean           result = FALSE;
+  gfloat             m[16];
+  gint               i = 0;
+
+  gimp_vector3_set (&axis[0], 1.0, 0.0, 0.0);
+  gimp_vector3_set (&axis[1], 0.0, 1.0, 0.0);
+  gimp_vector3_set (&axis[2], 0.0, 0.0, 1.0);
+
+  /* Front side */
+  /* ========== */
+
+  if (intersect_rect (scale.x, scale.y, scale.z / 2.0,
+                      viewp, dir, &face_intersect[i]) == TRUE)
+    {
+      face_intersect[i].face = 0;
+      gimp_vector3_set (&face_intersect[i++].n, 0.0, 0.0, 1.0);
+      result = TRUE;
+    }
+
+  /* Back side */
+  /* ========= */
+
+  if (intersect_rect (scale.x, scale.y, -scale.z / 2.0,
+                      viewp, dir, &face_intersect[i]) == TRUE)
+    {
+      face_intersect[i].face = 1;
+      face_intersect[i].u = 1.0 - face_intersect[i].u;
+      gimp_vector3_set (&face_intersect[i++].n, 0.0, 0.0, -1.0);
+      result = TRUE;
+    }
+
+  /* Check if we've found the two possible intersection points */
+  /* ========================================================= */
+
+  if (i < 2)
+    {
+      /* Top: Rotate viewpoint and direction into rectangle's local coordinate system */
+      /* ============================================================================ */
+
+      rotatemat (90, &axis[0], m);
+      vecmulmat (&v, &viewp, m);
+      vecmulmat (&d, &dir, m);
+
+      if (intersect_rect (scale.x, scale.z, scale.y / 2.0,
+                          v, d, &face_intersect[i]) == TRUE)
+        {
+          face_intersect[i].face = 2;
+
+          transpose_mat (m);
+          vecmulmat(&tmp, &face_intersect[i].s, m);
+          face_intersect[i].s = tmp;
+
+          gimp_vector3_set (&face_intersect[i++].n, 0.0, -1.0, 0.0);
+          result = TRUE;
+        }
+    }
+
+  /* Check if we've found the two possible intersection points */
+  /* ========================================================= */
+
+  if (i < 2)
+    {
+      /* Bottom: Rotate viewpoint and direction into rectangle's local coordinate system */
+      /* =============================================================================== */
+
+      rotatemat (90, &axis[0], m);
+      vecmulmat (&v, &viewp, m);
+      vecmulmat (&d, &dir, m);
+
+      if (intersect_rect (scale.x, scale.z, -scale.y / 2.0,
+                          v, d, &face_intersect[i]) == TRUE)
+        {
+          face_intersect[i].face = 3;
+
+          transpose_mat (m);
+
+          vecmulmat (&tmp, &face_intersect[i].s, m);
+          face_intersect[i].s = tmp;
+
+          face_intersect[i].v = 1.0 - face_intersect[i].v;
+
+          gimp_vector3_set (&face_intersect[i++].n, 0.0, 1.0, 0.0);
+
+          result = TRUE;
+        }
+    }
+
+  /* Check if we've found the two possible intersection points */
+  /* ========================================================= */
+
+  if (i < 2)
+    {
+      /* Left side: Rotate viewpoint and direction into rectangle's local coordinate system */
+      /* ================================================================================== */
+
+      rotatemat (90, &axis[1], m);
+      vecmulmat (&v, &viewp, m);
+      vecmulmat (&d, &dir, m);
+
+      if (intersect_rect (scale.z, scale.y, scale.x / 2.0,
+                          v, d, &face_intersect[i]) == TRUE)
+        {
+          face_intersect[i].face = 4;
+
+          transpose_mat (m);
+          vecmulmat (&tmp, &face_intersect[i].s, m);
+          face_intersect[i].s = tmp;
+
+          gimp_vector3_set (&face_intersect[i++].n, 1.0, 0.0, 0.0);
+          result = TRUE;
+        }
+    }
+
+  /* Check if we've found the two possible intersection points */
+  /* ========================================================= */
+
+  if (i < 2)
+    {
+      /* Right side: Rotate viewpoint and direction into rectangle's local coordinate system */
+      /* =================================================================================== */
+
+      rotatemat (90, &axis[1], m);
+      vecmulmat (&v, &viewp, m);
+      vecmulmat (&d, &dir, m);
+
+      if (intersect_rect (scale.z, scale.y, -scale.x / 2.0,
+                          v, d, &face_intersect[i]) == TRUE)
+        {
+          face_intersect[i].face = 5;
+
+          transpose_mat (m);
+          vecmulmat (&tmp, &face_intersect[i].s, m);
+
+          face_intersect[i].u = 1.0 - face_intersect[i].u;
+
+          gimp_vector3_set (&face_intersect[i++].n, -1.0, 0.0, 0.0);
+          result = TRUE;
+        }
+    }
+
+  /* Sort intersection points */
+  /* ======================== */
+
+  if (face_intersect[0].t > face_intersect[1].t)
+    {
+      face_tmp = face_intersect[0];
+      face_intersect[0] = face_intersect[1];
+      face_intersect[1] = face_tmp;
+    }
+
+  return result;
+}
+
+GimpRGB
+get_ray_color_box (GimpVector3 *pos)
+{
+  GimpVector3        lvp, ldir, vp, p, dir, ns, nn;
+  GimpRGB             color, color2;
+  gfloat             m[16];
+  gint               i;
+  FaceIntersectInfo  face_intersect[2];
+
+  color = background;
+  vp = mapvals.viewpoint;
+  p = *pos;
+
+  /* Translate viewpoint so that the box has its origin */
+  /* at its lower left corner.                          */
+  /* ================================================== */
+
+  vp.x = vp.x - mapvals.position.x;
+  vp.y = vp.y - mapvals.position.y;
+  vp.z = vp.z - mapvals.position.z;
+
+  p.x = p.x - mapvals.position.x;
+  p.y = p.y - mapvals.position.y;
+  p.z = p.z - mapvals.position.z;
+
+  /* Compute direction */
+  /* ================= */
+
+  gimp_vector3_sub (&dir, &p, &vp);
+  gimp_vector3_normalize (&dir);
+
+  /* Compute inverse of rotation matrix and apply it to   */
+  /* the viewpoint and direction. This transforms the     */
+  /* observer into the local coordinate system of the box */
+  /* ==================================================== */
+
+  memcpy (m, rotmat, sizeof (gfloat) * 16);
+
+  transpose_mat (m);
+
+  vecmulmat (&lvp, &vp, m);
+  vecmulmat (&ldir, &dir, m);
+
+  /* Ok. Now the observer is in the space where the box is located */
+  /* with its lower left corner at the origin and its axis aligned */
+  /* to the cartesian basis. Check if the transformed ray hits it. */
+  /* ============================================================= */
+
+  face_intersect[0].t = 1000000.0;
+  face_intersect[1].t = 1000000.0;
+
+  if (intersect_box (mapvals.scale, lvp, ldir, face_intersect) == TRUE)
+    {
+      /* We've hit the box. Transform the hit points and */
+      /* normals back into the world coordinate system   */
+      /* =============================================== */
+
+      for (i = 0; i < 2; i++)
+        {
+          vecmulmat (&ns, &face_intersect[i].s, rotmat);
+          vecmulmat (&nn, &face_intersect[i].n, rotmat);
+
+          ns.x = ns.x + mapvals.position.x;
+          ns.y = ns.y + mapvals.position.y;
+          ns.z = ns.z + mapvals.position.z;
+
+          face_intersect[i].s = ns;
+          face_intersect[i].n = nn;
+        }
+
+      color = get_box_image_color (face_intersect[0].face,
+                                   face_intersect[0].u,
+                                   face_intersect[0].v);
+
+      /* Check for total transparency... */
+      /* =============================== */
+
+      if (color.a < 1.0)
+        {
+          /* Hey, we can see  through here!      */
+          /* Lets see what's on the other side.. */
+          /* =================================== */
+
+          color = phong_shade (&face_intersect[0].s,
+                               &mapvals.viewpoint,
+                               &face_intersect[0].n,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+
+          color2 = get_box_image_color (face_intersect[1].face,
+                                        face_intersect[1].u,
+                                        face_intersect[1].v);
+
+          /* Make the normal point inwards */
+          /* ============================= */
+
+          gimp_vector3_mul (&face_intersect[1].n, -1.0);
+
+          color2 = phong_shade (&face_intersect[1].s,
+                                &mapvals.viewpoint,
+                                &face_intersect[1].n,
+                                &color2,
+                                &mapvals.lightsource.color,
+                                mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color2);
+
+          if (mapvals.transparent_background == FALSE && color2.a < 1.0)
+            {
+              gimp_rgb_composite (&color2, &background,
+                                  GIMP_RGB_COMPOSITE_BEHIND);
+            }
+
+          /* Compute a mix of the first and second colors */
+          /* ============================================ */
+
+          gimp_rgb_composite (&color, &color2, GIMP_RGB_COMPOSITE_NORMAL);
+          gimp_rgb_clamp (&color);
+        }
+      else if (color.a != 0.0 && mapvals.lightsource.type != NO_LIGHT)
+        {
+          color = phong_shade (&face_intersect[0].s,
+                               &mapvals.viewpoint,
+                               &face_intersect[0].n,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+        }
+    }
+  else
+    {
+      if (mapvals.transparent_background == TRUE)
+        gimp_rgb_set_alpha (&color, 0.0);
+    }
+
+  return color;
+}
+
+static gboolean
+intersect_circle (GimpVector3        vp,
+                  GimpVector3        dir,
+                  gdouble            w,
+                  FaceIntersectInfo *face_info)
+{
+  gboolean result = FALSE;
+  gdouble  r, d;
+
+#define sqr(a) (a*a)
+
+  if (dir.y != 0.0)
+    {
+      face_info->t = (w-vp.y)/dir.y;
+      face_info->s.x = vp.x + face_info->t*dir.x;
+      face_info->s.y = w;
+      face_info->s.z = vp.z + face_info->t*dir.z;
+
+      r = sqrt (sqr (face_info->s.x) + sqr (face_info->s.z));
+
+      if (r <= mapvals.cylinder_radius)
+        {
+          d = 2.0 * mapvals.cylinder_radius;
+          face_info->u = (face_info->s.x + mapvals.cylinder_radius) / d;
+          face_info->v = (face_info->s.z + mapvals.cylinder_radius) / d;
+          result = TRUE;
+        }
+    }
+
+#undef sqr
+
+  return result;
+}
+
+static gboolean
+intersect_cylinder (GimpVector3        vp,
+                    GimpVector3        dir,
+                    FaceIntersectInfo *face_intersect)
+{
+  gdouble  a, b, c, d, e, f, tmp, l;
+  gboolean result = FALSE;
+  gint     i;
+
+#define sqr(a) (a*a)
+
+  a = sqr (dir.x) + sqr (dir.z);
+  b = 2.0 * (vp.x * dir.x + vp.z * dir.z);
+  c = sqr (vp.x) + sqr (vp.z) - sqr (mapvals.cylinder_radius);
+
+  d = sqr (b) - 4.0 * a * c;
+
+  if (d >= 0.0)
+    {
+      e = sqrt (d);
+      f = 2.0 * a;
+
+      if (f != 0.0)
+        {
+          result = TRUE;
+
+          face_intersect[0].t = (-b+e)/f;
+          face_intersect[1].t = (-b-e)/f;
+
+          if (face_intersect[0].t>face_intersect[1].t)
+            {
+              tmp = face_intersect[0].t;
+              face_intersect[0].t = face_intersect[1].t;
+              face_intersect[1].t = tmp;
+            }
+
+          for (i = 0; i < 2; i++)
+            {
+              face_intersect[i].s.x = vp.x + face_intersect[i].t * dir.x;
+              face_intersect[i].s.y = vp.y + face_intersect[i].t * dir.y;
+              face_intersect[i].s.z = vp.z + face_intersect[i].t * dir.z;
+
+              face_intersect[i].n = face_intersect[i].s;
+              face_intersect[i].n.y = 0.0;
+              gimp_vector3_normalize(&face_intersect[i].n);
+
+              l = mapvals.cylinder_length/2.0;
+
+              face_intersect[i].u = (atan2(face_intersect[i].s.x,face_intersect[i].s.z)+G_PI)/(2.0*G_PI);
+              face_intersect[i].v = (face_intersect[i].s.y+l)/mapvals.cylinder_length;
+
+              /* Mark hitpoint as on the cylinder hull */
+              /* ===================================== */
+
+              face_intersect[i].face = 0;
+
+              /* Check if we're completely off the cylinder axis */
+              /* =============================================== */
+
+              if (face_intersect[i].s.y>l || face_intersect[i].s.y<-l)
+                {
+                  /* Check if we've hit a cap */
+                  /* ======================== */
+
+                  if (face_intersect[i].s.y>l)
+                    {
+                      if (intersect_circle(vp,dir,l,&face_intersect[i])==FALSE)
+                        result = FALSE;
+                      else
+                        {
+                          face_intersect[i].face = 2;
+                          face_intersect[i].v = 1 - face_intersect[i].v;
+                          gimp_vector3_set(&face_intersect[i].n, 0.0, 1.0, 0.0);
+                        }
+                    }
+                  else
+                    {
+                      if (intersect_circle(vp,dir,-l,&face_intersect[i])==FALSE)
+                        result = FALSE;
+                      else
+                        {
+                          face_intersect[i].face = 1;
+                          gimp_vector3_set(&face_intersect[i].n, 0.0, -1.0, 0.0);
+                        }
+                    }
+                }
+            }
+        }
+    }
+
+#undef sqr
+
+  return result;
+}
+
+static GimpRGB
+get_cylinder_color (gint    face,
+                    gdouble u,
+                    gdouble v)
+{
+  GimpRGB  color;
+  gint    inside;
+
+  if (face == 0)
+    color = get_image_color (u, v, &inside);
+  else
+    color = get_cylinder_image_color (face - 1, u, v);
+
+  return color;
+}
+
+GimpRGB
+get_ray_color_cylinder (GimpVector3 *pos)
+{
+  GimpVector3       lvp, ldir, vp, p, dir, ns, nn;
+  GimpRGB            color, color2;
+  gfloat            m[16];
+  gint              i;
+  FaceIntersectInfo face_intersect[2];
+
+  color = background;
+  vp = mapvals.viewpoint;
+  p = *pos;
+
+  vp.x = vp.x - mapvals.position.x;
+  vp.y = vp.y - mapvals.position.y;
+  vp.z = vp.z - mapvals.position.z;
+
+  p.x = p.x - mapvals.position.x;
+  p.y = p.y - mapvals.position.y;
+  p.z = p.z - mapvals.position.z;
+
+  /* Compute direction */
+  /* ================= */
+
+  gimp_vector3_sub (&dir, &p, &vp);
+  gimp_vector3_normalize (&dir);
+
+  /* Compute inverse of rotation matrix and apply it to   */
+  /* the viewpoint and direction. This transforms the     */
+  /* observer into the local coordinate system of the box */
+  /* ==================================================== */
+
+  memcpy (m, rotmat, sizeof (gfloat) * 16);
+
+  transpose_mat (m);
+
+  vecmulmat (&lvp, &vp, m);
+  vecmulmat (&ldir, &dir, m);
+
+  if (intersect_cylinder (lvp, ldir, face_intersect) == TRUE)
+    {
+      /* We've hit the cylinder. Transform the hit points and */
+      /* normals back into the world coordinate system        */
+      /* ==================================================== */
+
+      for (i = 0; i < 2; i++)
+        {
+          vecmulmat (&ns, &face_intersect[i].s, rotmat);
+          vecmulmat (&nn, &face_intersect[i].n, rotmat);
+
+          ns.x = ns.x + mapvals.position.x;
+          ns.y = ns.y + mapvals.position.y;
+          ns.z = ns.z + mapvals.position.z;
+
+          face_intersect[i].s = ns;
+          face_intersect[i].n = nn;
+        }
+
+      color = get_cylinder_color (face_intersect[0].face,
+                                  face_intersect[0].u,
+                                  face_intersect[0].v);
+
+      /* Check for transparency... */
+      /* ========================= */
+
+      if (color.a < 1.0)
+        {
+          /* Hey, we can see  through here!      */
+          /* Lets see what's on the other side.. */
+          /* =================================== */
+
+          color = phong_shade (&face_intersect[0].s,
+                               &mapvals.viewpoint,
+                               &face_intersect[0].n,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+
+          color2 = get_cylinder_color (face_intersect[1].face,
+                                       face_intersect[1].u,
+                                       face_intersect[1].v);
+
+          /* Make the normal point inwards */
+          /* ============================= */
+
+          gimp_vector3_mul (&face_intersect[1].n, -1.0);
+
+          color2 = phong_shade (&face_intersect[1].s,
+                                &mapvals.viewpoint,
+                                &face_intersect[1].n,
+                                &color2,
+                                &mapvals.lightsource.color,
+                                mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color2);
+
+          if (mapvals.transparent_background == FALSE && color2.a < 1.0)
+            {
+              gimp_rgb_composite (&color2, &background,
+                                  GIMP_RGB_COMPOSITE_BEHIND);
+            }
+
+          /* Compute a mix of the first and second colors */
+          /* ============================================ */
+
+          gimp_rgb_composite (&color, &color2, GIMP_RGB_COMPOSITE_NORMAL);
+          gimp_rgb_clamp (&color);
+        }
+      else if (color.a != 0.0 && mapvals.lightsource.type != NO_LIGHT)
+        {
+          color = phong_shade (&face_intersect[0].s,
+                               &mapvals.viewpoint,
+                               &face_intersect[0].n,
+                               &color,
+                               &mapvals.lightsource.color,
+                               mapvals.lightsource.type);
+
+          gimp_rgb_clamp (&color);
+        }
+    }
+  else
+    {
+      if (mapvals.transparent_background == TRUE)
+        gimp_rgb_set_alpha (&color, 0.0);
+    }
+
+  return color;
+}
diff --git a/plug-ins/map-object/map-object-shade.h b/plug-ins/map-object/map-object-shade.h
new file mode 100644
index 0000000..259e5eb
--- /dev/null
+++ b/plug-ins/map-object/map-object-shade.h
@@ -0,0 +1,26 @@
+#ifndef __MAPOBJECT_SHADE_H__
+#define __MAPOBJECT_SHADE_H__
+
+typedef GimpRGB (* get_ray_color_func) (GimpVector3 *pos);
+
+extern get_ray_color_func get_ray_color;
+
+GimpRGB   get_ray_color_plane    (GimpVector3 *pos);
+GimpRGB   get_ray_color_sphere   (GimpVector3 *pos);
+GimpRGB   get_ray_color_box      (GimpVector3 *pos);
+GimpRGB   get_ray_color_cylinder (GimpVector3 *pos);
+void     compute_bounding_box   (void);
+
+void     vecmulmat              (GimpVector3 *u,
+                                 GimpVector3 *v,
+                                 gfloat       m[16]);
+void     rotatemat              (gfloat       angle,
+                                 GimpVector3 *v,
+                                 gfloat       m[16]);
+void     transpose_mat          (gfloat       m[16]);
+void     matmul                 (gfloat       a[16],
+                                 gfloat       b[16],
+                                 gfloat       c[16]);
+void     ident_mat              (gfloat       m[16]);
+
+#endif  /* __MAPOBJECT_SHADE_H__ */
diff --git a/plug-ins/map-object/map-object-stock.c b/plug-ins/map-object/map-object-stock.c
new file mode 100644
index 0000000..fc3c153
--- /dev/null
+++ b/plug-ins/map-object/map-object-stock.c
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#include "config.h"
+
+#include <gtk/gtk.h>
+
+#include "map-object-stock.h"
+
+#include "../lighting/images/stock-pixbufs.h"
+
+
+static GtkIconFactory *mapobject_icon_factory = NULL;
+
+static GtkStockItem mapobject_stock_items[] =
+{
+  { STOCK_INTENSITY_AMBIENT_LOW,       NULL, 0, 0, NULL },
+  { STOCK_INTENSITY_AMBIENT_HIGH,      NULL, 0, 0, NULL },
+  { STOCK_INTENSITY_DIFFUSE_LOW,       NULL, 0, 0, NULL },
+  { STOCK_INTENSITY_DIFFUSE_HIGH,      NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_DIFFUSE_LOW,    NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_DIFFUSE_HIGH,   NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_SPECULAR_LOW,   NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_SPECULAR_HIGH,  NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_HIGHLIGHT_LOW,  NULL, 0, 0, NULL },
+  { STOCK_REFLECTIVITY_HIGHLIGHT_HIGH, NULL, 0, 0, NULL }
+};
+
+
+static void
+add_stock_icon (const gchar  *stock_id,
+                GtkIconSize   size,
+                const guint8 *inline_data)
+{
+  GtkIconSource *source;
+  GtkIconSet    *set;
+  GdkPixbuf     *pixbuf;
+
+  source = gtk_icon_source_new ();
+
+  gtk_icon_source_set_size (source, size);
+  gtk_icon_source_set_size_wildcarded (source, FALSE);
+
+  pixbuf = gdk_pixbuf_new_from_inline (-1, inline_data, FALSE, NULL);
+
+  gtk_icon_source_set_pixbuf (source, pixbuf);
+  g_object_unref (pixbuf);
+
+  set = gtk_icon_set_new ();
+
+  gtk_icon_set_add_source (set, source);
+  gtk_icon_source_free (source);
+
+  gtk_icon_factory_add (mapobject_icon_factory, stock_id, set);
+
+  gtk_icon_set_unref (set);
+}
+
+void
+mapobject_stock_init (void)
+{
+  static gboolean initialized = FALSE;
+
+  if (initialized)
+    return;
+
+  mapobject_icon_factory = gtk_icon_factory_new ();
+
+  add_stock_icon (STOCK_INTENSITY_AMBIENT_LOW,       GTK_ICON_SIZE_BUTTON,
+                  stock_intensity_ambient_low);
+  add_stock_icon (STOCK_INTENSITY_AMBIENT_HIGH,      GTK_ICON_SIZE_BUTTON,
+                  stock_intensity_ambient_high);
+  add_stock_icon (STOCK_INTENSITY_DIFFUSE_LOW,       GTK_ICON_SIZE_BUTTON,
+                  stock_intensity_diffuse_low);
+  add_stock_icon (STOCK_INTENSITY_DIFFUSE_HIGH,      GTK_ICON_SIZE_BUTTON,
+                  stock_intensity_diffuse_high);
+  add_stock_icon (STOCK_REFLECTIVITY_DIFFUSE_LOW,    GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_diffuse_low);
+  add_stock_icon (STOCK_REFLECTIVITY_DIFFUSE_HIGH,   GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_diffuse_high);
+  add_stock_icon (STOCK_REFLECTIVITY_SPECULAR_LOW,   GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_specular_low);
+  add_stock_icon (STOCK_REFLECTIVITY_SPECULAR_HIGH,  GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_specular_high);
+  add_stock_icon (STOCK_REFLECTIVITY_HIGHLIGHT_LOW,  GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_highlight_low);
+  add_stock_icon (STOCK_REFLECTIVITY_HIGHLIGHT_HIGH, GTK_ICON_SIZE_BUTTON,
+                  stock_reflectivity_highlight_high);
+
+  gtk_icon_factory_add_default (mapobject_icon_factory);
+
+  gtk_stock_add_static (mapobject_stock_items,
+                        G_N_ELEMENTS (mapobject_stock_items));
+
+  initialized = TRUE;
+}
diff --git a/plug-ins/map-object/map-object-stock.h b/plug-ins/map-object/map-object-stock.h
new file mode 100644
index 0000000..9226383
--- /dev/null
+++ b/plug-ins/map-object/map-object-stock.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __MAPOBJECT_STOCK_H__
+#define __MAPOBJECT_STOCK_H__
+
+
+#define STOCK_INTENSITY_AMBIENT_LOW        "intensity-ambient-low"
+#define STOCK_INTENSITY_AMBIENT_HIGH       "intensity-ambient-high"
+#define STOCK_INTENSITY_DIFFUSE_LOW        "intensity-diffuse-low"
+#define STOCK_INTENSITY_DIFFUSE_HIGH       "intensity-diffuse-high"
+#define STOCK_REFLECTIVITY_DIFFUSE_LOW     "reflectivity-diffuse-low"
+#define STOCK_REFLECTIVITY_DIFFUSE_HIGH    "reflectivity-diffuse-high"
+#define STOCK_REFLECTIVITY_SPECULAR_LOW    "reflectivity-specular-low"
+#define STOCK_REFLECTIVITY_SPECULAR_HIGH   "reflectivity-specular-high"
+#define STOCK_REFLECTIVITY_HIGHLIGHT_LOW   "reflectivity-highlight-low"
+#define STOCK_REFLECTIVITY_HIGHLIGHT_HIGH  "reflectivity-highlight-high"
+
+
+void  mapobject_stock_init (void);
+
+
+#endif /* __MAPOBJECT_STOCK_H__ */
diff --git a/plug-ins/map-object/map-object-ui.c b/plug-ins/map-object/map-object-ui.c
new file mode 100644
index 0000000..7f1d96d
--- /dev/null
+++ b/plug-ins/map-object/map-object-ui.c
@@ -0,0 +1,1462 @@
+/**************************************************************/
+/* Dialog creation and updaters, callbacks and event-handlers */
+/**************************************************************/
+
+#include "config.h"
+
+#include <libgimp/gimp.h>
+#include <libgimp/gimpui.h>
+
+#include "arcball.h"
+#include "map-object-ui.h"
+#include "map-object-image.h"
+#include "map-object-apply.h"
+#include "map-object-preview.h"
+#include "map-object-main.h"
+#include "map-object-stock.h"
+
+#include "libgimp/stdplugins-intl.h"
+
+
+GtkWidget     *previewarea = NULL;
+
+static GtkWidget   *appwin            = NULL;
+static GtkNotebook *options_note_book = NULL;
+
+static GtkWidget *pointlightwid;
+static GtkWidget *dirlightwid;
+
+static GtkAdjustment *xadj, *yadj, *zadj;
+
+static GtkWidget *box_page      = NULL;
+static GtkWidget *cylinder_page = NULL;
+
+static guint left_button_pressed = FALSE;
+static guint light_hit           = FALSE;
+
+
+static void create_main_notebook       (GtkWidget     *container);
+
+static gint preview_events             (GtkWidget     *area,
+                                        GdkEvent      *event);
+
+static void update_light_pos_entries   (void);
+
+static void double_adjustment_update   (GtkAdjustment *adjustment,
+                                        gpointer       data);
+
+static void toggle_update              (GtkWidget     *widget,
+                                        gpointer       data);
+
+static void lightmenu_callback         (GtkWidget     *widget,
+                                        gpointer       data);
+
+static void preview_callback           (GtkWidget     *widget,
+                                        gpointer       data);
+
+static gint box_constrain              (gint32         image_id,
+                                        gint32         drawable_id,
+                                        gpointer       data);
+static gint cylinder_constrain         (gint32         image_id,
+                                        gint32         drawable_id,
+                                        gpointer       data);
+
+static GtkWidget * create_options_page     (void);
+static GtkWidget * create_light_page       (void);
+static GtkWidget * create_material_page    (void);
+static GtkWidget * create_orientation_page (void);
+static GtkWidget * create_box_page         (void);
+static GtkWidget * create_cylinder_page    (void);
+
+
+/******************************************************/
+/* Update angle & position (redraw grid if necessary) */
+/******************************************************/
+
+static void
+double_adjustment_update (GtkAdjustment *adjustment,
+                          gpointer       data)
+{
+  gimp_double_adjustment_update (adjustment, data);
+
+  if (mapvals.livepreview)
+    compute_preview_image ();
+
+  gtk_widget_queue_draw (previewarea);
+}
+
+static void
+update_light_pos_entries (void)
+{
+  g_signal_handlers_block_by_func (xadj,
+                                   double_adjustment_update,
+                                   &mapvals.lightsource.position.x);
+  gtk_adjustment_set_value (GTK_ADJUSTMENT (xadj),
+                            mapvals.lightsource.position.x);
+  g_signal_handlers_unblock_by_func (xadj,
+                                     double_adjustment_update,
+                                     &mapvals.lightsource.position.x);
+
+  g_signal_handlers_block_by_func (yadj,
+                                   double_adjustment_update,
+                                   &mapvals.lightsource.position.y);
+  gtk_adjustment_set_value (GTK_ADJUSTMENT (yadj),
+                            mapvals.lightsource.position.y);
+  g_signal_handlers_unblock_by_func (yadj,
+                                     double_adjustment_update,
+                                     &mapvals.lightsource.position.y);
+
+  g_signal_handlers_block_by_func (zadj,
+                                   double_adjustment_update,
+                                   &mapvals.lightsource.position.z);
+  gtk_adjustment_set_value (GTK_ADJUSTMENT (zadj),
+                            mapvals.lightsource.position.z);
+  g_signal_handlers_unblock_by_func (zadj,
+                                     double_adjustment_update,
+                                     &mapvals.lightsource.position.z);
+}
+
+/**********************/
+/* Std. toggle update */
+/**********************/
+
+static void
+toggle_update (GtkWidget *widget,
+               gpointer   data)
+{
+  gimp_toggle_button_update (widget, data);
+
+  compute_preview_image ();
+  gtk_widget_queue_draw (previewarea);
+}
+
+/*****************************************/
+/* Main window light type menu callback. */
+/*****************************************/
+
+static void
+lightmenu_callback (GtkWidget *widget,
+                    gpointer   data)
+{
+  int active;
+
+  gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
+                                 &active);
+
+  mapvals.lightsource.type = active;
+
+  if (mapvals.lightsource.type == POINT_LIGHT)
+    {
+      gtk_widget_hide (dirlightwid);
+      gtk_widget_show (pointlightwid);
+    }
+  else if (mapvals.lightsource.type == DIRECTIONAL_LIGHT)
+    {
+      gtk_widget_hide (pointlightwid);
+      gtk_widget_show (dirlightwid);
+    }
+  else
+    {
+      gtk_widget_hide (pointlightwid);
+      gtk_widget_hide (dirlightwid);
+    }
+
+  if (mapvals.livepreview)
+    {
+      compute_preview_image ();
+      gtk_widget_queue_draw (previewarea);
+    }
+}
+
+/***************************************/
+/* Main window map type menu callback. */
+/***************************************/
+
+static void
+mapmenu_callback (GtkWidget *widget,
+                  gpointer   data)
+{
+  int active;
+
+  gimp_int_combo_box_get_active (GIMP_INT_COMBO_BOX (widget),
+                                 &active);
+
+  mapvals.maptype = active;
+
+  if (mapvals.livepreview)
+    {
+      compute_preview_image ();
+      gtk_widget_queue_draw (previewarea);
+    }
+
+  if (mapvals.maptype == MAP_BOX)
+    {
+      if (cylinder_page && gtk_widget_get_parent (GTK_WIDGET (cylinder_page)) ==
+          GTK_WIDGET (options_note_book))
+        {
+          gtk_container_remove (GTK_CONTAINER (options_note_book), cylinder_page);
+        }
+
+      if (!box_page)
+        {
+          box_page = create_box_page ();
+          g_object_ref (box_page);
+        }
+      gtk_notebook_append_page (options_note_book,
+                                box_page,
+                                gtk_label_new_with_mnemonic (_("_Box")));
+    }
+  else if (mapvals.maptype == MAP_CYLINDER)
+    {
+      if (box_page && gtk_widget_get_parent (GTK_WIDGET (box_page)) ==
+          GTK_WIDGET (options_note_book))
+        {
+          gtk_container_remove (GTK_CONTAINER (options_note_book), box_page);
+        }
+
+      if (!cylinder_page)
+        {
+          cylinder_page = create_cylinder_page ();
+          g_object_ref (cylinder_page);
+        }
+      gtk_notebook_append_page (options_note_book,
+                                cylinder_page,
+                                gtk_label_new_with_mnemonic (_("C_ylinder")));
+    }
+  else
+    {
+      if (box_page && gtk_widget_get_parent (GTK_WIDGET (box_page)) ==
+          GTK_WIDGET (options_note_book))
+        {
+          gtk_container_remove (GTK_CONTAINER (options_note_book), box_page);
+        }
+
+      if (cylinder_page && gtk_widget_get_parent (GTK_WIDGET (cylinder_page)) ==
+          GTK_WIDGET (options_note_book))
+        {
+          gtk_container_remove (GTK_CONTAINER (options_note_book), cylinder_page);
+        }
+    }
+}
+
+/******************************************/
+/* Main window "Preview!" button callback */
+/******************************************/
+
+static void
+preview_callback (GtkWidget *widget,
+                  gpointer   data)
+{
+  compute_preview_image ();
+
+  gtk_widget_queue_draw (previewarea);
+}
+
+static void
+zoomed_callback (GimpZoomModel *model)
+{
+  mapvals.zoom = gimp_zoom_model_get_factor (model);
+
+  compute_preview_image ();
+
+  gtk_widget_queue_draw (previewarea);
+}
+
+/**********************************************/
+/* Main window "Apply" button callback.       */
+/* Render to GIMP image, close down and exit. */
+/**********************************************/
+
+static gint
+box_constrain (gint32   image_id,
+               gint32   drawable_id,
+               gpointer data)
+{
+  if (drawable_id == -1)
+    return TRUE;
+
+  return (gimp_drawable_is_rgb (drawable_id) &&
+          !gimp_drawable_is_indexed (drawable_id));
+}
+
+static gint
+cylinder_constrain (gint32   image_id,
+                    gint32   drawable_id,
+                    gpointer data)
+{
+  if (drawable_id == -1)
+    return TRUE;
+
+  return (gimp_drawable_is_rgb (drawable_id) &&
+          !gimp_drawable_is_indexed (drawable_id));
+}
+
+/******************************/
+/* Preview area event handler */
+/******************************/
+
+static gint
+preview_events (GtkWidget *area,
+                GdkEvent  *event)
+{
+  HVect __attribute__((unused))pos;
+/*  HMatrix RotMat;
+  gdouble a,b,c; */
+
+  switch (event->type)
+    {
+      case GDK_ENTER_NOTIFY:
+        break;
+
+      case GDK_LEAVE_NOTIFY:
+        break;
+
+      case GDK_BUTTON_PRESS:
+        light_hit = check_light_hit (event->button.x, event->button.y);
+        if (light_hit == FALSE)
+          {
+            pos.x = -(2.0 * (gdouble) event->button.x /
+                      (gdouble) PREVIEW_WIDTH - 1.0);
+            pos.y = (2.0 * (gdouble) event->button.y /
+                     (gdouble) PREVIEW_HEIGHT - 1.0);
+            /*ArcBall_Mouse(pos);
+            ArcBall_BeginDrag(); */
+          }
+        left_button_pressed = TRUE;
+        break;
+
+      case GDK_BUTTON_RELEASE:
+        if (light_hit == TRUE)
+          {
+            compute_preview_image ();
+
+            gtk_widget_queue_draw (previewarea);
+          }
+        else
+          {
+            pos.x = -(2.0 * (gdouble) event->button.x /
+                      (gdouble) PREVIEW_WIDTH - 1.0);
+            pos.y = (2.0 * (gdouble) event->button.y /
+                     (gdouble) PREVIEW_HEIGHT - 1.0);
+            /*ArcBall_Mouse(pos);
+            ArcBall_EndDrag(); */
+          }
+        left_button_pressed = FALSE;
+        break;
+
+      case GDK_MOTION_NOTIFY:
+        if (left_button_pressed == TRUE)
+          {
+            if (light_hit == TRUE)
+              {
+                gint live = mapvals.livepreview;
+
+                mapvals.livepreview = FALSE;
+                update_light (event->motion.x, event->motion.y);
+                update_light_pos_entries ();
+                mapvals.livepreview = live;
+              }
+            else
+              {
+                pos.x = -(2.0 * (gdouble) event->motion.x /
+                          (gdouble) PREVIEW_WIDTH - 1.0);
+                pos.y = (2.0 * (gdouble) event->motion.y /
+                         (gdouble) PREVIEW_HEIGHT - 1.0);
+/*                ArcBall_Mouse(pos);
+                ArcBall_Update();
+                ArcBall_Values(&a,&b,&c);
+                Alpha+=RadToDeg(-a);
+                Beta+RadToDeg(-b);
+                Gamma+=RadToDeg(-c);
+                if (Alpha>180) Alpha-=360;
+                if (Alpha<-180) Alpha+=360;
+                if (Beta>180) Beta-=360;
+                if (Beta<-180) Beta+=360;
+                if (Gamma>180) Gamma-=360;
+                if (Gamma<-180) Gamma+=360;
+                      UpdateAngleSliders(); */
+              }
+          }
+        break;
+
+      default:
+        break;
+    }
+
+  return FALSE;
+}
+
+
+static GtkWidget *
+spin_button_new (GtkAdjustment **adjustment,  /* return value */
+                 gdouble         value,
+                 gdouble         lower,
+                 gdouble         upper,
+                 gdouble         step_increment,
+                 gdouble         page_increment,
+                 gdouble         page_size,
+                 gdouble         climb_rate,
+                 guint           digits)
+{
+  GtkWidget *spinbutton;
+
+  *adjustment = (GtkAdjustment *)
+                gtk_adjustment_new (value, lower, upper,
+                                    step_increment, page_increment, 0);
+
+  spinbutton = gimp_spin_button_new (GTK_ADJUSTMENT (*adjustment),
+                                     climb_rate, digits);
+
+  gtk_spin_button_set_numeric (GTK_SPIN_BUTTON (spinbutton), TRUE);
+
+  return spinbutton;
+}
+
+/*******************************/
+/* Create general options page */
+/*******************************/
+
+static GtkWidget *
+create_options_page (void)
+{
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *vbox;
+  GtkWidget     *hbox;
+  GtkWidget     *label;
+  GtkWidget     *combo;
+  GtkWidget     *toggle;
+  GtkWidget     *table;
+  GtkWidget     *spinbutton;
+  GtkAdjustment *adj;
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  /* General options */
+
+  frame = gimp_frame_new (_("General Options"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+  gtk_container_add (GTK_CONTAINER (frame), vbox);
+  gtk_widget_show (vbox);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  label = gtk_label_new (_("Map to:"));
+  gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 0);
+  gtk_widget_show (label);
+
+  combo = gimp_int_combo_box_new (_("Plane"),    MAP_PLANE,
+                                  _("Sphere"),   MAP_SPHERE,
+                                  _("Box"),      MAP_BOX,
+                                  _("Cylinder"), MAP_CYLINDER,
+                                  NULL);
+  gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo), mapvals.maptype);
+  gtk_box_pack_start (GTK_BOX (hbox), combo, TRUE, TRUE, 0);
+  gtk_widget_show (combo);
+
+  g_signal_connect (combo, "changed",
+                    G_CALLBACK (mapmenu_callback),
+                    &mapvals.maptype);
+
+  gimp_help_set_help_data (combo, _("Type of object to map to"), NULL);
+
+  toggle = gtk_check_button_new_with_label (_("Transparent background"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                mapvals.transparent_background);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (toggle_update),
+                    &mapvals.transparent_background);
+
+  gimp_help_set_help_data (toggle,
+                           _("Make image transparent outside object"), NULL);
+
+  toggle = gtk_check_button_new_with_label (_("Tile source image"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                mapvals.tiled);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (toggle_update),
+                    &mapvals.tiled);
+
+  gimp_help_set_help_data (toggle,
+                           _("Tile source image: useful for infinite planes"),
+                           NULL);
+
+  toggle = gtk_check_button_new_with_label (_("Create new image"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                mapvals.create_new_image);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (gimp_toggle_button_update),
+                    &mapvals.create_new_image);
+
+  gimp_help_set_help_data (toggle,
+                           _("Create a new image when applying filter"), NULL);
+
+  toggle = gtk_check_button_new_with_label (_("Create new layer"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                mapvals.create_new_layer);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (gimp_toggle_button_update),
+                    &mapvals.create_new_layer);
+
+  gimp_help_set_help_data (toggle,
+                           _("Create a new layer when applying filter"), NULL);
+
+  /* Antialiasing options */
+
+  frame = gimp_frame_new (NULL);
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  toggle = gtk_check_button_new_with_mnemonic (_("Enable _antialiasing"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle),
+                                mapvals.antialiasing);
+  gtk_frame_set_label_widget (GTK_FRAME (frame), toggle);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (gimp_toggle_button_update),
+                    &mapvals.antialiasing);
+
+  gimp_help_set_help_data (toggle,
+                           _("Enable/disable jagged edges removal "
+                             "(antialiasing)"), NULL);
+
+  table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  g_object_bind_property (toggle, "active",
+                          table,  "sensitive",
+                          G_BINDING_SYNC_CREATE);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("_Depth:"), 0, 0,
+                              mapvals.maxdepth, 1.0, 5.0, 0.1, 1.0,
+                              1, TRUE, 0, 0,
+                              _("Antialiasing quality. Higher is better, "
+                               "but slower"), NULL);
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (gimp_double_adjustment_update),
+                    &mapvals.maxdepth);
+
+  spinbutton = spin_button_new (&adj, mapvals.pixelthreshold,
+                                0.001, 1000, 0.1, 1, 0, 0, 3);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("_Threshold:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.pixelthreshold);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Stop when pixel differences are smaller than "
+                             "this value"), NULL);
+
+  gtk_widget_show (page);
+
+  return page;
+}
+
+/******************************/
+/* Create light settings page */
+/******************************/
+
+static GtkWidget *
+create_light_page (void)
+{
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *table;
+  GtkWidget     *combo;
+  GtkWidget     *colorbutton;
+  GtkWidget     *spinbutton;
+  GtkAdjustment *adj;
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  frame = gimp_frame_new (_("Light Settings"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 2, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);  gtk_widget_show (table);
+
+  combo = gimp_int_combo_box_new (_("Point light"),       POINT_LIGHT,
+                                  _("Directional light"), DIRECTIONAL_LIGHT,
+                                  _("No light"),          NO_LIGHT,
+                                  NULL);
+  gimp_int_combo_box_set_active (GIMP_INT_COMBO_BOX (combo),
+                                 mapvals.lightsource.type);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                             _("Lightsource type:"), 0.0, 0.5,
+                             combo, 1, FALSE);
+
+  g_signal_connect (combo, "changed",
+                    G_CALLBACK (lightmenu_callback),
+                    &mapvals.lightsource.type);
+
+  gimp_help_set_help_data (combo, _("Type of light source to apply"), NULL);
+
+  colorbutton = gimp_color_button_new (_("Select lightsource color"),
+                                       64, 16,
+                                       &mapvals.lightsource.color,
+                                       GIMP_COLOR_AREA_FLAT);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Lightsource color:"), 0.0, 0.5,
+                             colorbutton, 1, FALSE);
+
+  g_signal_connect (colorbutton, "color-changed",
+                    G_CALLBACK (gimp_color_button_get_color),
+                    &mapvals.lightsource.color);
+
+  gimp_help_set_help_data (colorbutton,
+                           _("Set light source color"), NULL);
+
+  pointlightwid = gimp_frame_new (_("Position"));
+  gtk_box_pack_start (GTK_BOX (page), pointlightwid, FALSE, FALSE, 0);
+
+  if (mapvals.lightsource.type == POINT_LIGHT)
+    gtk_widget_show (pointlightwid);
+
+  table = gtk_table_new (3, 2, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (pointlightwid), table);
+  gtk_widget_show (table);
+
+  spinbutton = spin_button_new (&xadj, mapvals.lightsource.position.x,
+                                -G_MAXFLOAT, G_MAXFLOAT,
+                                0.1, 1.0, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                             _("X:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (xadj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.position.x);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source X position in XYZ space"), NULL);
+
+  spinbutton = spin_button_new (&yadj, mapvals.lightsource.position.y,
+                                -G_MAXFLOAT, G_MAXFLOAT,
+                                0.1, 1.0, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Y:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (yadj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.position.y);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source Y position in XYZ space"), NULL);
+
+  spinbutton = spin_button_new (&zadj, mapvals.lightsource.position.z,
+                                -G_MAXFLOAT, G_MAXFLOAT,
+                                0.1, 1.0, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+                             _("Z:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (zadj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.position.z);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source Z position in XYZ space"), NULL);
+
+
+  dirlightwid = gimp_frame_new (_("Direction Vector"));
+  gtk_box_pack_start (GTK_BOX (page), dirlightwid, FALSE, FALSE, 0);
+
+  if (mapvals.lightsource.type == DIRECTIONAL_LIGHT)
+    gtk_widget_show (dirlightwid);
+
+  table = gtk_table_new (3, 2, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (dirlightwid), table);
+  gtk_widget_show (table);
+
+  spinbutton = spin_button_new (&adj, mapvals.lightsource.direction.x,
+                                -1.0, 1.0, 0.01, 0.1, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                             _("X:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.direction.x);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source X direction in XYZ space"), NULL);
+
+  spinbutton = spin_button_new (&adj, mapvals.lightsource.direction.y,
+                                -1.0, 1.0, 0.01, 0.1, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                             _("Y:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.direction.y);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source Y direction in XYZ space"), NULL);
+
+  spinbutton = spin_button_new (&adj, mapvals.lightsource.direction.z,
+                                -1.0, 1.0, 0.01, 0.1, 0.0, 0.0, 2);
+  gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+                             _("Z:"), 0.0, 0.5,
+                             spinbutton, 1, TRUE);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.lightsource.direction.z);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Light source Z direction in XYZ space"), NULL);
+
+  gtk_widget_show (page);
+
+  return page;
+}
+
+/*********************************/
+/* Create material settings page */
+/*********************************/
+
+static GtkWidget *
+create_material_page (void)
+{
+  GtkSizeGroup  *group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *table;
+  GtkWidget     *label;
+  GtkWidget     *hbox;
+  GtkWidget     *spinbutton;
+  GtkWidget     *image;
+  GtkAdjustment *adj;
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  frame = gimp_frame_new (_("Intensity Levels"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_container_add (GTK_CONTAINER (frame), hbox);
+  gtk_widget_show (hbox);
+
+  table = gtk_table_new (2, 4, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_box_pack_start (GTK_BOX (hbox), table, FALSE, FALSE, 0);
+  gtk_widget_show (table);
+
+  /* Ambient intensity */
+
+  image = gtk_image_new_from_stock (STOCK_INTENSITY_AMBIENT_LOW,
+                                    GTK_ICON_SIZE_BUTTON);
+  label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                                     _("Ambient:"), 0.0, 0.5,
+                                     image, 1, FALSE);
+  gtk_size_group_add_widget (group, label);
+
+  spinbutton = spin_button_new (&adj, mapvals.material.ambient_int,
+                                0, G_MAXFLOAT, 0.1, 1.0, 0.0, 0.0, 2);
+  gtk_table_attach (GTK_TABLE (table), spinbutton, 2, 3, 0, 1,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (spinbutton);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.material.ambient_int);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Amount of original color to show where no "
+                             "direct light falls"), NULL);
+
+  image = gtk_image_new_from_stock (STOCK_INTENSITY_AMBIENT_HIGH,
+                                    GTK_ICON_SIZE_BUTTON);
+  gtk_table_attach (GTK_TABLE (table), image, 3, 4, 0, 1,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (image);
+
+  /* Diffuse intensity */
+
+  image = gtk_image_new_from_stock (STOCK_INTENSITY_DIFFUSE_LOW,
+                                    GTK_ICON_SIZE_BUTTON);
+  label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                                     _("Diffuse:"), 0.0, 0.5,
+                                     image, 1, FALSE);
+  gtk_size_group_add_widget (group, label);
+
+  spinbutton = spin_button_new (&adj, mapvals.material.diffuse_int,
+                                0, G_MAXFLOAT, 0.1, 1.0, 0.0, 0.0, 2);
+  gtk_table_attach (GTK_TABLE (table), spinbutton, 2, 3, 1, 2,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (spinbutton);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.material.diffuse_int);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Intensity of original color when lit by a light "
+                             "source"), NULL);
+
+  image = gtk_image_new_from_stock (STOCK_INTENSITY_DIFFUSE_HIGH,
+                                    GTK_ICON_SIZE_BUTTON);
+  gtk_table_attach (GTK_TABLE (table), image, 3, 4, 1, 2,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (image);
+
+  frame = gimp_frame_new (_("Reflectivity"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_container_add (GTK_CONTAINER (frame), hbox);
+  gtk_widget_show (hbox);
+
+  table = gtk_table_new (3, 4, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_box_pack_start (GTK_BOX (hbox), table, FALSE, FALSE, 0);
+  gtk_widget_show (table);
+
+  /* Diffuse reflection */
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_DIFFUSE_LOW,
+                                    GTK_ICON_SIZE_BUTTON);
+  label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 0,
+                                     _("Diffuse:"), 0.0, 0.5,
+                                     image, 1, FALSE);
+  gtk_size_group_add_widget (group, label);
+
+  spinbutton = spin_button_new (&adj, mapvals.material.diffuse_ref,
+                                0, G_MAXFLOAT, 0.1, 1.0, 0.0, 0.0, 2);
+  gtk_table_attach (GTK_TABLE (table), spinbutton, 2, 3, 0, 1,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (spinbutton);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.material.diffuse_ref);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Higher values makes the object reflect more "
+                             "light (appear lighter)"), NULL);
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_DIFFUSE_HIGH,
+                                    GTK_ICON_SIZE_BUTTON);
+  gtk_table_attach (GTK_TABLE (table), image, 3, 4, 0, 1,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (image);
+
+  /* Specular reflection */
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_SPECULAR_LOW,
+                                    GTK_ICON_SIZE_BUTTON);
+  label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 1,
+                                     _("Specular:"), 0.0, 0.5,
+                                     image, 1, FALSE);
+  gtk_size_group_add_widget (group, label);
+
+  spinbutton = spin_button_new (&adj, mapvals.material.specular_ref,
+                                0, G_MAXFLOAT, 0.1, 1.0, 0.0, 0.0, 2);
+  gtk_table_attach (GTK_TABLE (table), spinbutton, 2, 3, 1, 2,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (spinbutton);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.material.specular_ref);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Controls how intense the highlights will be"),
+                           NULL);
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_SPECULAR_HIGH,
+                                    GTK_ICON_SIZE_BUTTON);
+  gtk_table_attach (GTK_TABLE (table), image, 3, 4, 1, 2,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (image);
+
+  /* Highlight */
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_HIGHLIGHT_LOW,
+                                    GTK_ICON_SIZE_BUTTON);
+  label = gimp_table_attach_aligned (GTK_TABLE (table), 0, 2,
+                                     _("Highlight:"), 0.0, 0.5,
+                                     image, 1, FALSE);
+  gtk_size_group_add_widget (group, label);
+
+  spinbutton = spin_button_new (&adj, mapvals.material.highlight,
+                                0, G_MAXFLOAT, 0.1, 1.0, 0.0, 0.0, 2);
+  gtk_table_attach (GTK_TABLE (table), spinbutton, 2, 3, 2, 3,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (spinbutton);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.material.highlight);
+
+  gimp_help_set_help_data (spinbutton,
+                           _("Higher values makes the highlights more focused"),
+                           NULL);
+
+  image = gtk_image_new_from_stock (STOCK_REFLECTIVITY_HIGHLIGHT_HIGH,
+                                    GTK_ICON_SIZE_BUTTON);
+  gtk_table_attach (GTK_TABLE (table), image, 3, 4, 2, 3,
+                    GTK_SHRINK | GTK_FILL, GTK_SHRINK | GTK_FILL, 0, 0);
+  gtk_widget_show (image);
+
+  gtk_widget_show (page);
+
+  g_object_unref (group);
+
+  return page;
+}
+
+/****************************************/
+/* Create orientation and position page */
+/****************************************/
+
+static GtkWidget *
+create_orientation_page (void)
+{
+  GtkSizeGroup  *group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *table;
+  GtkAdjustment *adj;
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  frame = gimp_frame_new (_("Position"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("X:"), 0, 0,
+                              mapvals.position.x, -1.0, 2.0, 0.01, 0.1, 5,
+                              TRUE, 0, 0,
+                              _("Object X position in XYZ space"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.01, 5);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.position.x);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
+                              _("Y:"), 0, 0,
+                              mapvals.position.y, -1.0, 2.0, 0.01, 0.1, 5,
+                              TRUE, 0, 0,
+                              _("Object Y position in XYZ space"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.01, 5);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.position.y);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
+                              _("Z:"), 0, 0,
+                              mapvals.position.z, -1.0, 2.0, 0.01, 0.1, 5,
+                              TRUE, 0, 0,
+                              _("Object Z position in XYZ space"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.01, 5);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.position.z);
+
+  frame = gimp_frame_new (_("Rotation"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("X:"), 0, 0,
+                              mapvals.alpha, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              _("Rotation angle about X axis"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.alpha);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
+                              _("Y:"), 0, 0,
+                              mapvals.beta, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              _("Rotation angle about Y axis"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.beta);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
+                              _("Z:"), 0, 0,
+                              mapvals.gamma, -180.0, 180.0, 1.0, 15.0, 1,
+                              TRUE, 0, 0,
+                              _("Rotation angle about Z axis"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_SPINBUTTON (adj));
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.gamma);
+
+  gtk_widget_show (page);
+
+  g_object_unref (group);
+
+  return page;
+}
+
+static GtkWidget *
+create_box_page (void)
+{
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *vbox;
+  GtkWidget     *table;
+  GtkAdjustment *adj;
+  gint           i;
+
+  static gchar *labels[] =
+  {
+    N_("Front:"), N_("Back:"),
+    N_("Top:"),   N_("Bottom:"),
+    N_("Left:"),  N_("Right:")
+  };
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  frame = gimp_frame_new (_("Map Images to Box Faces"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_add (GTK_CONTAINER (frame), vbox);
+  gtk_widget_show (vbox);
+
+  table = gtk_table_new (6, 2, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE(table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE(table), 6);
+  gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 5);
+  gtk_widget_show (table);
+
+  for (i = 0; i < 6; i++)
+    {
+      GtkWidget *combo;
+
+      combo = gimp_drawable_combo_box_new (box_constrain, NULL);
+      gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
+                                  mapvals.boxmap_id[i],
+                                  G_CALLBACK (gimp_int_combo_box_get_active),
+                                  &mapvals.boxmap_id[i]);
+
+      gimp_table_attach_aligned (GTK_TABLE (table), 0, i,
+                                 gettext (labels[i]), 0.0, 0.5,
+                                 combo, 1, FALSE);
+    }
+
+  /* Scale scales */
+
+  table = gtk_table_new (3, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE(table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE(table), 6);
+  gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
+  gtk_widget_show (table);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("Scale X:"), 0, 0,
+                              mapvals.scale.x, 0.0, 5.0, 0.01, 0.1, 2,
+                              TRUE, 0, 0,
+                              _("X scale (size)"), NULL);
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.1, 2);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.scale.x);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
+                              _("Y:"), 0, 0,
+                              mapvals.scale.y, 0.0, 5.0, 0.01, 0.1, 2,
+                              TRUE, 0, 0,
+                              _("Y scale (size)"), NULL);
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.1, 2);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.scale.y);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 2,
+                              _("Z:"), 0, 0,
+                              mapvals.scale.z, 0.0, 5.0, 0.01, 0.1, 2,
+                              TRUE, 0, 0,
+                              _("Z scale (size)"), NULL);
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.1, 2);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.scale.z);
+
+  gtk_widget_show (page);
+
+  return page;
+}
+
+static GtkWidget *
+create_cylinder_page (void)
+{
+  GtkSizeGroup  *group = gtk_size_group_new (GTK_SIZE_GROUP_HORIZONTAL);
+  GtkWidget     *page;
+  GtkWidget     *frame;
+  GtkWidget     *table;
+  GtkAdjustment *adj;
+  gint           i;
+
+  static const gchar *labels[] = { N_("_Top:"), N_("_Bottom:") };
+
+  page = gtk_box_new (GTK_ORIENTATION_VERTICAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (page), 12);
+
+  frame = gimp_frame_new (_("Images for the Cap Faces"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 2, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  /* Option menus */
+
+  for (i = 0; i < 2; i++)
+    {
+      GtkWidget *combo;
+      GtkWidget *label;
+
+      combo = gimp_drawable_combo_box_new (cylinder_constrain, NULL);
+      gimp_int_combo_box_connect (GIMP_INT_COMBO_BOX (combo),
+                                  mapvals.cylindermap_id[i],
+                                  G_CALLBACK (gimp_int_combo_box_get_active),
+                                  &mapvals.cylindermap_id[i]);
+
+      label = gimp_table_attach_aligned (GTK_TABLE (table), 0, i,
+                                         gettext (labels[i]), 0.0, 0.5,
+                                         combo, 1, FALSE);
+      gtk_size_group_add_widget (group, label);
+    }
+
+  frame = gimp_frame_new (_("Size"));
+  gtk_box_pack_start (GTK_BOX (page), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  table = gtk_table_new (2, 3, FALSE);
+  gtk_table_set_row_spacings (GTK_TABLE (table), 6);
+  gtk_table_set_col_spacings (GTK_TABLE (table), 6);
+  gtk_container_add (GTK_CONTAINER (frame), table);
+  gtk_widget_show (table);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 0,
+                              _("R_adius:"), 0, 0,
+                              mapvals.cylinder_radius,
+                              0.0, 2.0, 0.01, 0.1, 2,
+                              TRUE, 0, 0,
+                              _("Cylinder radius"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.1, 2);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.cylinder_radius);
+
+  adj = (GtkAdjustment *)
+        gimp_scale_entry_new (GTK_TABLE (table), 0, 1,
+                              _("L_ength:"), 0, 0,
+                              mapvals.cylinder_length,
+                              0.0, 2.0, 0.01, 0.1, 2,
+                              TRUE, 0, 0,
+                              _("Cylinder length"), NULL);
+  gtk_size_group_add_widget (group, GIMP_SCALE_ENTRY_LABEL (adj));
+  gtk_spin_button_configure (GIMP_SCALE_ENTRY_SPINBUTTON (adj),
+                             GIMP_SCALE_ENTRY_SPINBUTTON_ADJ (adj), 0.1, 2);
+
+  g_signal_connect (adj, "value-changed",
+                    G_CALLBACK (double_adjustment_update),
+                    &mapvals.cylinder_length);
+
+  gtk_widget_show (page);
+
+  g_object_unref (group);
+
+  return page;
+}
+
+/****************************/
+/* Create notbook and pages */
+/****************************/
+
+static void
+create_main_notebook (GtkWidget *container)
+{
+  GtkWidget *page;
+
+  options_note_book = GTK_NOTEBOOK (gtk_notebook_new ());
+  gtk_container_add (GTK_CONTAINER (container),
+                     GTK_WIDGET (options_note_book));
+
+  page = create_options_page ();
+  gtk_notebook_append_page (options_note_book, page,
+                            gtk_label_new_with_mnemonic (_("O_ptions")));
+
+  page = create_light_page ();
+  gtk_notebook_append_page (options_note_book, page,
+                            gtk_label_new_with_mnemonic (_("_Light")));
+
+  page = create_material_page ();
+  gtk_notebook_append_page (options_note_book, page,
+                            gtk_label_new_with_mnemonic (_("_Material")));
+
+  page = create_orientation_page ();
+  gtk_notebook_append_page (options_note_book, page,
+                            gtk_label_new_with_mnemonic (_("O_rientation")));
+
+  if (mapvals.maptype == MAP_BOX)
+    {
+      box_page = create_box_page ();
+      g_object_ref (box_page);
+      gtk_notebook_append_page (options_note_book, box_page,
+                                gtk_label_new_with_mnemonic (_("_Box")));
+    }
+  else if (mapvals.maptype == MAP_CYLINDER)
+    {
+      cylinder_page = create_cylinder_page ();
+      g_object_ref (cylinder_page);
+      gtk_notebook_append_page (options_note_book, cylinder_page,
+                                gtk_label_new_with_mnemonic (_("C_ylinder")));
+    }
+
+  gtk_widget_show (GTK_WIDGET (options_note_book));
+}
+
+/********************************/
+/* Create and show main dialog. */
+/********************************/
+
+gboolean
+main_dialog (gint32 drawable_id)
+{
+  GtkWidget     *main_hbox;
+  GtkWidget     *vbox;
+  GtkWidget     *hbox;
+  GtkWidget     *frame;
+  GtkWidget     *button;
+  GtkWidget     *toggle;
+  GimpZoomModel *model;
+  gboolean       run = FALSE;
+
+  gimp_ui_init (PLUG_IN_BINARY, FALSE);
+
+  appwin = gimp_dialog_new (_("Map to Object"), PLUG_IN_ROLE,
+                            NULL, 0,
+                            gimp_standard_help_func, PLUG_IN_PROC,
+
+                            _("_Cancel"), GTK_RESPONSE_CANCEL,
+                            _("_OK"),     GTK_RESPONSE_OK,
+
+                            NULL);
+
+  gtk_dialog_set_alternative_button_order (GTK_DIALOG (appwin),
+                                           GTK_RESPONSE_OK,
+                                           GTK_RESPONSE_CANCEL,
+                                           -1);
+
+  gimp_window_set_transient (GTK_WINDOW (appwin));
+
+  main_hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 12);
+  gtk_container_set_border_width (GTK_CONTAINER (main_hbox), 12);
+  gtk_box_pack_start (GTK_BOX (gtk_dialog_get_content_area (GTK_DIALOG (appwin))),
+                      main_hbox, FALSE, FALSE, 0);
+  gtk_widget_show (main_hbox);
+
+  /* Create the Preview */
+
+  vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 6);
+  gtk_box_pack_start (GTK_BOX (main_hbox), vbox, FALSE, FALSE, 0);
+  gtk_widget_show (vbox);
+
+  /* Add preview widget and various buttons to the first part */
+
+  frame = gtk_frame_new (NULL);
+  gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN);
+  gtk_box_pack_start (GTK_BOX (vbox), frame, FALSE, FALSE, 0);
+  gtk_widget_show (frame);
+
+  gtk_widget_realize (appwin);
+  previewarea = gtk_drawing_area_new ();
+  gtk_widget_set_size_request (previewarea, PREVIEW_WIDTH, PREVIEW_HEIGHT);
+  gtk_widget_set_events (previewarea, (GDK_EXPOSURE_MASK |
+                                       GDK_BUTTON1_MOTION_MASK |
+                                       GDK_BUTTON_PRESS_MASK |
+                                       GDK_BUTTON_RELEASE_MASK));
+  gtk_container_add (GTK_CONTAINER (frame), previewarea);
+  gtk_widget_show (previewarea);
+
+  g_signal_connect (previewarea, "event",
+                    G_CALLBACK (preview_events),
+                    previewarea);
+
+  g_signal_connect (previewarea, "expose-event",
+                    G_CALLBACK (preview_expose),
+                    previewarea);
+
+  hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 6);
+  gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
+  gtk_widget_show (hbox);
+
+  button = gtk_button_new_with_mnemonic (_("_Preview!"));
+  gtk_misc_set_padding (GTK_MISC (gtk_bin_get_child (GTK_BIN (button))), 2, 0);
+  gtk_box_pack_start (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+  gtk_widget_show (button);
+
+  g_signal_connect (button, "clicked",
+                    G_CALLBACK (preview_callback),
+                    NULL);
+
+  gimp_help_set_help_data (button, _("Recompute preview image"), NULL);
+
+  model = gimp_zoom_model_new ();
+  gimp_zoom_model_set_range (model, 0.25, 1.0);
+  gimp_zoom_model_zoom (model, GIMP_ZOOM_TO, mapvals.zoom);
+
+  button = gimp_zoom_button_new (model, GIMP_ZOOM_IN, GTK_ICON_SIZE_MENU);
+  gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+  gtk_widget_show (button);
+
+  button = gimp_zoom_button_new (model, GIMP_ZOOM_OUT, GTK_ICON_SIZE_MENU);
+  gtk_box_pack_end (GTK_BOX (hbox), button, FALSE, FALSE, 0);
+  gtk_widget_show (button);
+
+  g_signal_connect (model, "zoomed",
+                    G_CALLBACK (zoomed_callback),
+                    NULL);
+
+  toggle = gtk_check_button_new_with_mnemonic (_("Show _wireframe"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), mapvals.showgrid);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (toggle_update),
+                    &mapvals.showgrid);
+
+  toggle = gtk_check_button_new_with_mnemonic (_("Update preview _live"));
+  gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (toggle), mapvals.livepreview);
+  gtk_box_pack_start (GTK_BOX (vbox), toggle, FALSE, FALSE, 0);
+  gtk_widget_show (toggle);
+
+  g_signal_connect (toggle, "toggled",
+                    G_CALLBACK (toggle_update),
+                    &mapvals.livepreview);
+
+  create_main_notebook (main_hbox);
+
+  gtk_widget_show (appwin);
+
+  {
+    GdkCursor *cursor;
+
+    cursor = gdk_cursor_new_for_display (gtk_widget_get_display (previewarea),
+                                         GDK_HAND2);
+    gdk_window_set_cursor (gtk_widget_get_window (previewarea), cursor);
+    gdk_cursor_unref (cursor);
+  }
+
+  image_setup (drawable_id, TRUE);
+
+  compute_preview_image ();
+
+  if (gimp_dialog_run (GIMP_DIALOG (appwin)) == GTK_RESPONSE_OK)
+    run = TRUE;
+
+  gtk_widget_destroy (appwin);
+  if (preview_rgb_data)
+    g_free (preview_rgb_data);
+  if (preview_surface)
+    cairo_surface_destroy (preview_surface);
+  if (box_page)
+    g_object_unref (box_page);
+  if (cylinder_page)
+    g_object_unref (cylinder_page);
+
+  return run;
+}
diff --git a/plug-ins/map-object/map-object-ui.h b/plug-ins/map-object/map-object-ui.h
new file mode 100644
index 0000000..69f6065
--- /dev/null
+++ b/plug-ins/map-object/map-object-ui.h
@@ -0,0 +1,14 @@
+#ifndef __MAPOBJECT_UI_H__
+#define __MAPOBJECT_UI_H__
+
+/* Externally visible variables */
+/* ============================ */
+
+extern GtkWidget *previewarea;
+
+/* Externally visible functions */
+/* ============================ */
+
+gboolean main_dialog (gint32 drawable_id);
+
+#endif  /* __MAPOBJECT_UI_H__ */