1 files changed, 180 insertions, 0 deletions
diff --git a/svx/source/engine3d/camera3d.cxx b/svx/source/engine3d/camera3d.cxx
new file mode 100644
index 000000000..30a1b09fb
--- /dev/null
+++ b/svx/source/engine3d/camera3d.cxx
@@ -0,0 +1,180 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <svx/camera3d.hxx>
+
+Camera3D::Camera3D(const basegfx::B3DPoint& rPos, const basegfx::B3DPoint& rLookAt,
+                   double fFocalLen)
+    : fBankAngle(0)
+    , bAutoAdjustProjection(true)
+{
+    SetPosition(rPos);
+    SetLookAt(rLookAt);
+    SetFocalLength(fFocalLen);
+}
+
+Camera3D::Camera3D()
+    : fFocalLength(35.0)
+    , fBankAngle(0.0)
+    , bAutoAdjustProjection(false)
+{
+}
+
+// Set ViewWindow and adjust PRP
+
+void Camera3D::SetViewWindow(double fX, double fY, double fW, double fH)
+{
+    Viewport3D::SetViewWindow(fX, fY, fW, fH);
+    if (bAutoAdjustProjection)
+        SetFocalLength(fFocalLength);
+}
+
+void Camera3D::SetPosition(const basegfx::B3DPoint& rNewPos)
+{
+    if (rNewPos != aPosition)
+    {
+        aPosition = rNewPos;
+        SetVRP(aPosition);
+        SetVPN(aPosition - aLookAt);
+        SetBankAngle(fBankAngle);
+    }
+}
+
+void Camera3D::SetLookAt(const basegfx::B3DPoint& rNewLookAt)
+{
+    if (rNewLookAt != aLookAt)
+    {
+        aLookAt = rNewLookAt;
+        SetVPN(aPosition - aLookAt);
+        SetBankAngle(fBankAngle);
+    }
+}
+
+void Camera3D::SetPosAndLookAt(const basegfx::B3DPoint& rNewPos,
+                               const basegfx::B3DPoint& rNewLookAt)
+{
+    if (rNewPos != aPosition || rNewLookAt != aLookAt)
+    {
+        aPosition = rNewPos;
+        aLookAt = rNewLookAt;
+
+        SetVRP(aPosition);
+        SetVPN(aPosition - aLookAt);
+        SetBankAngle(fBankAngle);
+    }
+}
+
+void Camera3D::SetBankAngle(double fAngle)
+{
+    basegfx::B3DVector aDiff(aPosition - aLookAt);
+    basegfx::B3DVector aPrj(aDiff);
+    fBankAngle = fAngle;
+
+    if (aDiff.getY() == 0)
+    {
+        aPrj.setY(-1.0);
+    }
+    else
+    { // aPrj = Projection from aDiff on the XZ-plane
+        aPrj.setY(0.0);
+
+        if (aDiff.getY() < 0.0)
+        {
+            aPrj = -aPrj;
+        }
+    }
+
+    // Calculate from aDiff to upwards pointing View-Up-Vector
+    // duplicated line is intentional!
+    aPrj = aPrj.getPerpendicular(aDiff);
+    aPrj = aPrj.getPerpendicular(aDiff);
+    aDiff.normalize();
+
+    // Rotate on Z axis, to rotate the BankAngle and back
+    basegfx::B3DHomMatrix aTf;
+    const double fV(sqrt(aDiff.getY() * aDiff.getY() + aDiff.getZ() * aDiff.getZ()));
+
+    if (fV != 0.0)
+    {
+        basegfx::B3DHomMatrix aTemp;
+        const double fSin(aDiff.getY() / fV);
+        const double fCos(aDiff.getZ() / fV);
+
+        aTemp.set(1, 1, fCos);
+        aTemp.set(2, 2, fCos);
+        aTemp.set(2, 1, fSin);
+        aTemp.set(1, 2, -fSin);
+
+        aTf *= aTemp;
+    }
+
+    {
+        basegfx::B3DHomMatrix aTemp;
+        const double fSin(-aDiff.getX());
+        const double fCos(fV);
+
+        aTemp.set(0, 0, fCos);
+        aTemp.set(2, 2, fCos);
+        aTemp.set(0, 2, fSin);
+        aTemp.set(2, 0, -fSin);
+
+        aTf *= aTemp;
+    }
+
+    aTf.rotate(0.0, 0.0, fBankAngle);
+
+    {
+        basegfx::B3DHomMatrix aTemp;
+        const double fSin(aDiff.getX());
+        const double fCos(fV);
+
+        aTemp.set(0, 0, fCos);
+        aTemp.set(2, 2, fCos);
+        aTemp.set(0, 2, fSin);
+        aTemp.set(2, 0, -fSin);
+
+        aTf *= aTemp;
+    }
+
+    if (fV != 0.0)
+    {
+        basegfx::B3DHomMatrix aTemp;
+        const double fSin(-aDiff.getY() / fV);
+        const double fCos(aDiff.getZ() / fV);
+
+        aTemp.set(1, 1, fCos);
+        aTemp.set(2, 2, fCos);
+        aTemp.set(2, 1, fSin);
+        aTemp.set(1, 2, -fSin);
+
+        aTf *= aTemp;
+    }
+
+    SetVUV(aTf * aPrj);
+}
+
+void Camera3D::SetFocalLength(double fLen)
+{
+    if (fLen < 5)
+        fLen = 5;
+    SetPRP(basegfx::B3DPoint(0.0, 0.0, fLen / 35.0 * aViewWin.W));
+    fFocalLength = fLen;
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */