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+/* -*- 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 <drawinglayer/primitive3d/sdrextrudelathetools3d.hxx>
+
+#include <osl/diagnose.h>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/range/b2drange.hxx>
+#include <basegfx/polygon/b2dpolypolygontools.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/point/b3dpoint.hxx>
+#include <basegfx/polygon/b3dpolygon.hxx>
+#include <basegfx/polygon/b3dpolygontools.hxx>
+#include <basegfx/polygon/b3dpolypolygontools.hxx>
+#include <basegfx/range/b3drange.hxx>
+#include <basegfx/matrix/b3dhommatrix.hxx>
+#include <basegfx/polygon/b2dpolygontools.hxx>
+#include <drawinglayer/geometry/viewinformation3d.hxx>
+#include <numeric>
+
+
+// decomposition helpers for extrude/lathe (rotation) objects
+
+namespace
+{
+
+ // common helpers
+
+ basegfx::B2DPolyPolygon impScalePolyPolygonOnCenter(
+ const basegfx::B2DPolyPolygon& rSource,
+ double fScale)
+ {
+ basegfx::B2DPolyPolygon aRetval(rSource);
+
+ if(!basegfx::fTools::equalZero(fScale))
+ {
+ const basegfx::B2DRange aRange(basegfx::utils::getRange(rSource));
+ const basegfx::B2DPoint aCenter(aRange.getCenter());
+ basegfx::B2DHomMatrix aTrans;
+
+ aTrans.translate(-aCenter.getX(), -aCenter.getY());
+ aTrans.scale(fScale, fScale);
+ aTrans.translate(aCenter.getX(), aCenter.getY());
+ aRetval.transform(aTrans);
+ }
+
+ return aRetval;
+ }
+
+ void impGetOuterPolyPolygon(
+ basegfx::B2DPolyPolygon& rPolygon,
+ basegfx::B2DPolyPolygon& rOuterPolyPolygon,
+ double fOffset,
+ bool bCharacterMode)
+ {
+ rOuterPolyPolygon = rPolygon;
+
+ if(!basegfx::fTools::more(fOffset, 0.0))
+ return;
+
+ if(bCharacterMode)
+ {
+ // grow the outside polygon and scale all polygons to original size. This is done
+ // to avoid a shrink which potentially would lead to self-intersections, but changes
+ // the original polygon -> not a precision step, so e.g. not usable for charts
+ const basegfx::B2DRange aRange(basegfx::utils::getRange(rPolygon));
+ rPolygon = basegfx::utils::growInNormalDirection(rPolygon, fOffset);
+ const basegfx::B2DRange aGrownRange(basegfx::utils::getRange(rPolygon));
+ const double fScaleX(basegfx::fTools::equalZero(aGrownRange.getWidth()) ? 1.0 : aRange.getWidth() / aGrownRange.getWidth());
+ const double fScaleY(basegfx::fTools::equalZero(aGrownRange.getHeight())? 1.0 : aRange.getHeight() / aGrownRange.getHeight());
+ basegfx::B2DHomMatrix aScaleTrans;
+
+ aScaleTrans.translate(-aGrownRange.getMinX(), -aGrownRange.getMinY());
+ aScaleTrans.scale(fScaleX, fScaleY);
+ aScaleTrans.translate(aRange.getMinX(), aRange.getMinY());
+ rPolygon.transform(aScaleTrans);
+ rOuterPolyPolygon.transform(aScaleTrans);
+ }
+ else
+ {
+ // use more precision, shrink the outer polygons. Since this may lead to self-intersections,
+ // some kind of correction should be applied here after that step
+ rOuterPolyPolygon = basegfx::utils::growInNormalDirection(rPolygon, -fOffset);
+ // basegfx::utils::correctGrowShrinkPolygonPair(rPolygon, rOuterPolyPolygon);
+ }
+ }
+
+ void impAddInBetweenFill(
+ basegfx::B3DPolyPolygon& rTarget,
+ const basegfx::B3DPolyPolygon& rPolA,
+ const basegfx::B3DPolyPolygon& rPolB,
+ double fTexVerStart,
+ double fTexVerStop,
+ bool bCreateNormals,
+ bool bCreateTextureCoordinates)
+ {
+ OSL_ENSURE(rPolA.count() == rPolB.count(), "impAddInBetweenFill: unequally sized polygons (!)");
+ const sal_uInt32 nPolygonCount(std::min(rPolA.count(), rPolB.count()));
+
+ for(sal_uInt32 a(0); a < nPolygonCount; a++)
+ {
+ const basegfx::B3DPolygon& aSubA(rPolA.getB3DPolygon(a));
+ const basegfx::B3DPolygon& aSubB(rPolB.getB3DPolygon(a));
+ OSL_ENSURE(aSubA.count() == aSubB.count(), "impAddInBetweenFill: unequally sized polygons (!)");
+ const sal_uInt32 nPointCount(std::min(aSubA.count(), aSubB.count()));
+
+ if(nPointCount)
+ {
+ const sal_uInt32 nEdgeCount(aSubA.isClosed() ? nPointCount : nPointCount - 1);
+ double fTexHorMultiplicatorA(0.0), fTexHorMultiplicatorB(0.0);
+ double fPolygonPosA(0.0), fPolygonPosB(0.0);
+
+ if(bCreateTextureCoordinates)
+ {
+ const double fPolygonLengthA(basegfx::utils::getLength(aSubA));
+ fTexHorMultiplicatorA = basegfx::fTools::equalZero(fPolygonLengthA) ? 1.0 : 1.0 / fPolygonLengthA;
+
+ const double fPolygonLengthB(basegfx::utils::getLength(aSubB));
+ fTexHorMultiplicatorB = basegfx::fTools::equalZero(fPolygonLengthB) ? 1.0 : 1.0 / fPolygonLengthB;
+ }
+
+ for(sal_uInt32 b(0); b < nEdgeCount; b++)
+ {
+ const sal_uInt32 nIndexA(b);
+ const sal_uInt32 nIndexB((b + 1) % nPointCount);
+
+ const basegfx::B3DPoint aStartA(aSubA.getB3DPoint(nIndexA));
+ const basegfx::B3DPoint aEndA(aSubA.getB3DPoint(nIndexB));
+ const basegfx::B3DPoint aStartB(aSubB.getB3DPoint(nIndexA));
+ const basegfx::B3DPoint aEndB(aSubB.getB3DPoint(nIndexB));
+
+ basegfx::B3DPolygon aNew;
+ aNew.setClosed(true);
+
+ aNew.append(aStartA);
+ aNew.append(aStartB);
+ aNew.append(aEndB);
+ aNew.append(aEndA);
+
+ if(bCreateNormals)
+ {
+ aNew.setNormal(0, aSubA.getNormal(nIndexA));
+ aNew.setNormal(1, aSubB.getNormal(nIndexA));
+ aNew.setNormal(2, aSubB.getNormal(nIndexB));
+ aNew.setNormal(3, aSubA.getNormal(nIndexB));
+ }
+
+ if(bCreateTextureCoordinates)
+ {
+ const double fRelTexAL(fPolygonPosA * fTexHorMultiplicatorA);
+ const double fEdgeLengthA(basegfx::B3DVector(aEndA - aStartA).getLength());
+ fPolygonPosA += fEdgeLengthA;
+ const double fRelTexAR(fPolygonPosA * fTexHorMultiplicatorA);
+
+ const double fRelTexBL(fPolygonPosB * fTexHorMultiplicatorB);
+ const double fEdgeLengthB(basegfx::B3DVector(aEndB - aStartB).getLength());
+ fPolygonPosB += fEdgeLengthB;
+ const double fRelTexBR(fPolygonPosB * fTexHorMultiplicatorB);
+
+ aNew.setTextureCoordinate(0, basegfx::B2DPoint(fRelTexAL, fTexVerStart));
+ aNew.setTextureCoordinate(1, basegfx::B2DPoint(fRelTexBL, fTexVerStop));
+ aNew.setTextureCoordinate(2, basegfx::B2DPoint(fRelTexBR, fTexVerStop));
+ aNew.setTextureCoordinate(3, basegfx::B2DPoint(fRelTexAR, fTexVerStart));
+ }
+
+ rTarget.append(aNew);
+ }
+ }
+ }
+ }
+
+ void impSetNormal(
+ basegfx::B3DPolyPolygon& rCandidate,
+ const basegfx::B3DVector& rNormal)
+ {
+ for(sal_uInt32 a(0); a < rCandidate.count(); a++)
+ {
+ basegfx::B3DPolygon aSub(rCandidate.getB3DPolygon(a));
+
+ for(sal_uInt32 b(0); b < aSub.count(); b++)
+ {
+ aSub.setNormal(b, rNormal);
+ }
+
+ rCandidate.setB3DPolygon(a, aSub);
+ }
+ }
+
+ void impCreateInBetweenNormals(
+ basegfx::B3DPolyPolygon& rPolA,
+ basegfx::B3DPolyPolygon& rPolB)
+ {
+ OSL_ENSURE(rPolA.count() == rPolB.count(), "sdrExtrudePrimitive3D: unequally sized polygons (!)");
+ const sal_uInt32 nPolygonCount(std::min(rPolA.count(), rPolB.count()));
+
+ for(sal_uInt32 a(0); a < nPolygonCount; a++)
+ {
+ basegfx::B3DPolygon aSubA(rPolA.getB3DPolygon(a));
+ basegfx::B3DPolygon aSubB(rPolB.getB3DPolygon(a));
+ OSL_ENSURE(aSubA.count() == aSubB.count(), "sdrExtrudePrimitive3D: unequally sized polygons (!)");
+ const sal_uInt32 nPointCount(std::min(aSubA.count(), aSubB.count()));
+
+ if(nPointCount)
+ {
+ basegfx::B3DPoint aPrevA(aSubA.getB3DPoint(nPointCount - 1));
+ basegfx::B3DPoint aCurrA(aSubA.getB3DPoint(0));
+ const bool bClosed(aSubA.isClosed());
+
+ for(sal_uInt32 b(0); b < nPointCount; b++)
+ {
+ const sal_uInt32 nIndNext((b + 1) % nPointCount);
+ const basegfx::B3DPoint aNextA(aSubA.getB3DPoint(nIndNext));
+ const basegfx::B3DPoint aCurrB(aSubB.getB3DPoint(b));
+
+ // vector to back
+ basegfx::B3DVector aDepth(aCurrB - aCurrA);
+ aDepth.normalize();
+
+ if(aDepth.equalZero())
+ {
+ // no difference, try to get depth from next point
+ const basegfx::B3DPoint aNextB(aSubB.getB3DPoint(nIndNext));
+ aDepth = aNextB - aNextA;
+ aDepth.normalize();
+ }
+
+ // vector to left (correct for non-closed lines)
+ const bool bFirstAndNotClosed(!bClosed && 0 == b);
+ basegfx::B3DVector aLeft(bFirstAndNotClosed ? aCurrA - aNextA : aPrevA - aCurrA);
+ aLeft.normalize();
+
+ // create left normal
+ const basegfx::B3DVector aNormalLeft(aDepth.getPerpendicular(aLeft));
+
+ // smooth horizontal normals
+ {
+ // vector to right (correct for non-closed lines)
+ const bool bLastAndNotClosed(!bClosed && b + 1 == nPointCount);
+ basegfx::B3DVector aRight(bLastAndNotClosed ? aCurrA - aPrevA : aNextA - aCurrA);
+ aRight.normalize();
+
+ // create right normal
+ const basegfx::B3DVector aNormalRight(aRight.getPerpendicular(aDepth));
+
+ // create smoothed in-between normal
+ basegfx::B3DVector aNewNormal(aNormalLeft + aNormalRight);
+ aNewNormal.normalize();
+
+ // set as new normal at polygons
+ aSubA.setNormal(b, aNewNormal);
+ aSubB.setNormal(b, aNewNormal);
+ }
+
+ // prepare next step
+ aPrevA = aCurrA;
+ aCurrA = aNextA;
+ }
+
+ rPolA.setB3DPolygon(a, aSubA);
+ rPolB.setB3DPolygon(a, aSubB);
+ }
+ }
+ }
+
+ void impMixNormals(
+ basegfx::B3DPolyPolygon& rPolA,
+ const basegfx::B3DPolyPolygon& rPolB,
+ double fWeightA)
+ {
+ const double fWeightB(1.0 - fWeightA);
+ OSL_ENSURE(rPolA.count() == rPolB.count(), "sdrExtrudePrimitive3D: unequally sized polygons (!)");
+ const sal_uInt32 nPolygonCount(std::min(rPolA.count(), rPolB.count()));
+
+ for(sal_uInt32 a(0); a < nPolygonCount; a++)
+ {
+ basegfx::B3DPolygon aSubA(rPolA.getB3DPolygon(a));
+ const basegfx::B3DPolygon& aSubB(rPolB.getB3DPolygon(a));
+ OSL_ENSURE(aSubA.count() == aSubB.count(), "sdrExtrudePrimitive3D: unequally sized polygons (!)");
+ const sal_uInt32 nPointCount(std::min(aSubA.count(), aSubB.count()));
+
+ for(sal_uInt32 b(0); b < nPointCount; b++)
+ {
+ const basegfx::B3DVector aVA(aSubA.getNormal(b) * fWeightA);
+ const basegfx::B3DVector aVB(aSubB.getNormal(b) * fWeightB);
+ basegfx::B3DVector aVNew(aVA + aVB);
+ aVNew.normalize();
+ aSubA.setNormal(b, aVNew);
+ }
+
+ rPolA.setB3DPolygon(a, aSubA);
+ }
+ }
+
+ bool impHasCutWith(const basegfx::B2DPolygon& rPoly, const basegfx::B2DPoint& rStart, const basegfx::B2DPoint& rEnd)
+ {
+ // polygon is closed, one of the points is a member
+ const sal_uInt32 nPointCount(rPoly.count());
+
+ if(!nPointCount)
+ return false;
+
+ basegfx::B2DPoint aCurrent(rPoly.getB2DPoint(0));
+ const basegfx::B2DVector aVector(rEnd - rStart);
+
+ for(sal_uInt32 a(0); a < nPointCount; a++)
+ {
+ const sal_uInt32 nNextIndex((a + 1) % nPointCount);
+ const basegfx::B2DPoint aNext(rPoly.getB2DPoint(nNextIndex));
+ const basegfx::B2DVector aEdgeVector(aNext - aCurrent);
+
+ if(basegfx::utils::findCut(
+ rStart, aVector,
+ aCurrent, aEdgeVector) != CutFlagValue::NONE)
+ {
+ return true;
+ }
+
+ aCurrent = aNext;
+ }
+
+ return false;
+ }
+} // end of anonymous namespace
+
+
+namespace drawinglayer::primitive3d
+{
+ void createLatheSlices(
+ Slice3DVector& rSliceVector,
+ const basegfx::B2DPolyPolygon& rSource,
+ double fBackScale,
+ double fDiagonal,
+ double fRotation,
+ sal_uInt32 nSteps,
+ bool bCharacterMode,
+ bool bCloseFront,
+ bool bCloseBack)
+ {
+ if(basegfx::fTools::equalZero(fRotation) || 0 == nSteps)
+ {
+ // no rotation or no steps, just one plane
+ rSliceVector.emplace_back(rSource, basegfx::B3DHomMatrix());
+ }
+ else
+ {
+ const bool bBackScale(!basegfx::fTools::equal(fBackScale, 1.0));
+ const bool bClosedRotation(!bBackScale && basegfx::fTools::equal(fRotation, 2 * M_PI));
+ basegfx::B2DPolyPolygon aFront(rSource);
+ basegfx::B2DPolyPolygon aBack(rSource);
+ basegfx::B3DHomMatrix aTransformBack;
+ basegfx::B2DPolyPolygon aOuterBack;
+
+ if(bClosedRotation)
+ {
+ bCloseFront = bCloseBack = false;
+ }
+
+ if(bBackScale)
+ {
+ // avoid null zoom
+ if(basegfx::fTools::equalZero(fBackScale))
+ {
+ fBackScale = 0.000001;
+ }
+
+ // back is scaled compared to front, create scaled version
+ aBack = impScalePolyPolygonOnCenter(aBack, fBackScale);
+ }
+
+ if(bCloseFront || bCloseBack)
+ {
+ const basegfx::B2DRange aBaseRange(basegfx::utils::getRange(aFront));
+ const double fOuterLength(aBaseRange.getMaxX() * fRotation);
+ const double fInnerLength(aBaseRange.getMinX() * fRotation);
+ const double fAverageLength((fOuterLength + fInnerLength) * 0.5);
+
+ if(bCloseFront)
+ {
+ const double fOffsetLen((fAverageLength / 12.0) * fDiagonal);
+ basegfx::B2DPolyPolygon aOuterFront;
+ impGetOuterPolyPolygon(aFront, aOuterFront, fOffsetLen, bCharacterMode);
+ basegfx::B3DHomMatrix aTransform;
+ aTransform.translate(0.0, 0.0, fOffsetLen);
+ rSliceVector.emplace_back(aOuterFront, aTransform, SLICETYPE3D_FRONTCAP);
+ }
+
+ if(bCloseBack)
+ {
+ const double fOffsetLen((fAverageLength / 12.0) * fDiagonal);
+ impGetOuterPolyPolygon(aBack, aOuterBack, fOffsetLen, bCharacterMode);
+ aTransformBack.translate(0.0, 0.0, -fOffsetLen);
+ aTransformBack.rotate(0.0, fRotation, 0.0);
+ }
+ }
+
+ // add start polygon (a = 0)
+ if(!bClosedRotation)
+ {
+ rSliceVector.emplace_back(aFront, basegfx::B3DHomMatrix());
+ }
+
+ // create segments (a + 1 .. nSteps)
+ const double fStepSize(1.0 / static_cast<double>(nSteps));
+
+ for(sal_uInt32 a(0); a < nSteps; a++)
+ {
+ const double fStep(static_cast<double>(a + 1) * fStepSize);
+ basegfx::B2DPolyPolygon aNewPoly(bBackScale ? basegfx::utils::interpolate(aFront, aBack, fStep) : aFront);
+ basegfx::B3DHomMatrix aNewMat;
+ aNewMat.rotate(0.0, fRotation * fStep, 0.0);
+ rSliceVector.emplace_back(aNewPoly, aNewMat);
+ }
+
+ if(bCloseBack)
+ {
+ rSliceVector.emplace_back(aOuterBack, aTransformBack, SLICETYPE3D_BACKCAP);
+ }
+ }
+ }
+
+ void createExtrudeSlices(
+ Slice3DVector& rSliceVector,
+ const basegfx::B2DPolyPolygon& rSource,
+ double fBackScale,
+ double fDiagonal,
+ double fDepth,
+ bool bCharacterMode,
+ bool bCloseFront,
+ bool bCloseBack)
+ {
+ if(basegfx::fTools::equalZero(fDepth))
+ {
+ // no depth, just one plane
+ rSliceVector.emplace_back(rSource, basegfx::B3DHomMatrix());
+ }
+ else
+ {
+ // there is depth, create Polygons for front,back and their default depth positions
+ basegfx::B2DPolyPolygon aFront(rSource);
+ basegfx::B2DPolyPolygon aBack(rSource);
+ const bool bBackScale(!basegfx::fTools::equal(fBackScale, 1.0));
+ double fZFront(fDepth); // default depth for aFront
+ double fZBack(0.0); // default depth for aBack
+ basegfx::B2DPolyPolygon aOuterBack;
+
+ if(bBackScale)
+ {
+ // avoid null zoom
+ if(basegfx::fTools::equalZero(fBackScale))
+ {
+ fBackScale = 0.000001;
+ }
+
+ // aFront is scaled compared to aBack, create scaled version
+ aFront = impScalePolyPolygonOnCenter(aFront, fBackScale);
+ }
+
+ if(bCloseFront)
+ {
+ const double fOffset(fDepth * fDiagonal * 0.5);
+ fZFront = fDepth - fOffset;
+ basegfx::B2DPolyPolygon aOuterFront;
+ impGetOuterPolyPolygon(aFront, aOuterFront, fOffset, bCharacterMode);
+ basegfx::B3DHomMatrix aTransformFront;
+ aTransformFront.translate(0.0, 0.0, fDepth);
+ rSliceVector.emplace_back(aOuterFront, aTransformFront, SLICETYPE3D_FRONTCAP);
+ }
+
+ if(bCloseBack)
+ {
+ const double fOffset(fDepth * fDiagonal * 0.5);
+ fZBack = fOffset;
+ impGetOuterPolyPolygon(aBack, aOuterBack, fOffset, bCharacterMode);
+ }
+
+ // add front and back polygons at evtl. changed depths
+ {
+ basegfx::B3DHomMatrix aTransformA, aTransformB;
+
+ aTransformA.translate(0.0, 0.0, fZFront);
+ rSliceVector.emplace_back(aFront, aTransformA);
+
+ aTransformB.translate(0.0, 0.0, fZBack);
+ rSliceVector.emplace_back(aBack, aTransformB);
+ }
+
+ if(bCloseBack)
+ {
+ rSliceVector.emplace_back(aOuterBack, basegfx::B3DHomMatrix(), SLICETYPE3D_BACKCAP);
+ }
+ }
+ }
+
+ basegfx::B3DPolyPolygon extractHorizontalLinesFromSlice(const Slice3DVector& rSliceVector, bool bCloseHorLines)
+ {
+ basegfx::B3DPolyPolygon aRetval;
+ const sal_uInt32 nNumSlices(rSliceVector.size());
+
+ if(nNumSlices)
+ {
+ const sal_uInt32 nSlideSubPolygonCount(rSliceVector[0].getB3DPolyPolygon().count());
+
+ for(sal_uInt32 b(0); b < nSlideSubPolygonCount; b++)
+ {
+ const sal_uInt32 nSubPolygonPointCount(rSliceVector[0].getB3DPolyPolygon().getB3DPolygon(b).count());
+
+ for(sal_uInt32 c(0); c < nSubPolygonPointCount; c++)
+ {
+ basegfx::B3DPolygon aNew;
+
+ for(sal_uInt32 d(0); d < nNumSlices; d++)
+ {
+ const bool bSamePolygonCount(nSlideSubPolygonCount == rSliceVector[d].getB3DPolyPolygon().count());
+ const bool bSamePointCount(nSubPolygonPointCount == rSliceVector[d].getB3DPolyPolygon().getB3DPolygon(b).count());
+
+ if(bSamePolygonCount && bSamePointCount)
+ {
+ aNew.append(rSliceVector[d].getB3DPolyPolygon().getB3DPolygon(b).getB3DPoint(c));
+ }
+ else
+ {
+ OSL_ENSURE(bSamePolygonCount, "Slice tools::PolyPolygon with different Polygon count (!)");
+ OSL_ENSURE(bSamePointCount, "Slice Polygon with different point count (!)");
+ }
+ }
+
+ aNew.setClosed(bCloseHorLines);
+ aRetval.append(aNew);
+ }
+ }
+ }
+
+ return aRetval;
+ }
+
+ basegfx::B3DPolyPolygon extractVerticalLinesFromSlice(const Slice3DVector& rSliceVector)
+ {
+ basegfx::B3DPolyPolygon aRetval;
+ const sal_uInt32 nNumSlices(rSliceVector.size());
+
+ for(sal_uInt32 a(0); a < nNumSlices; a++)
+ {
+ aRetval.append(rSliceVector[a].getB3DPolyPolygon());
+ }
+
+ return aRetval;
+ }
+
+ void extractPlanesFromSlice(
+ std::vector< basegfx::B3DPolyPolygon >& rFill,
+ const Slice3DVector& rSliceVector,
+ bool bCreateNormals,
+ bool bSmoothNormals,
+ bool bSmoothLids,
+ bool bClosed,
+ double fSmoothNormalsMix,
+ double fSmoothLidsMix,
+ bool bCreateTextureCoordinates,
+ const basegfx::B2DHomMatrix& rTexTransform)
+ {
+ const sal_uInt32 nNumSlices(rSliceVector.size());
+
+ if(!nNumSlices)
+ return;
+
+ // common parameters
+ const sal_uInt32 nLoopCount(bClosed ? nNumSlices : nNumSlices - 1);
+ basegfx::B3DPolyPolygon aEdgeRounding;
+ sal_uInt32 a;
+
+ // texture parameters
+ double fInvTexHeight(1.0);
+ std::vector<double> aTexHeightArray;
+ basegfx::B3DRange aTexRangeFront;
+ basegfx::B3DRange aTexRangeBack;
+
+ if(bCreateTextureCoordinates)
+ {
+ aTexRangeFront = basegfx::utils::getRange(rSliceVector[0].getB3DPolyPolygon());
+ aTexRangeBack = basegfx::utils::getRange(rSliceVector[nNumSlices - 1].getB3DPolyPolygon());
+
+ if(aTexRangeBack.getDepth() > aTexRangeBack.getWidth())
+ {
+ // last polygon is rotated so that depth is bigger than width, exchange X and Z
+ // for making applyDefaultTextureCoordinatesParallel use Z instead of X for
+ // horizontal texture coordinate
+ aTexRangeBack = basegfx::B3DRange(
+ aTexRangeBack.getMinZ(), aTexRangeBack.getMinY(), aTexRangeBack.getMinX(),
+ aTexRangeBack.getMaxZ(), aTexRangeBack.getMaxY(), aTexRangeBack.getMaxX());
+ }
+
+ basegfx::B3DPoint aCenter(basegfx::utils::getRange(rSliceVector[0].getB3DPolyPolygon()).getCenter());
+
+ for(a = 0; a < nLoopCount; a++)
+ {
+ const basegfx::B3DPoint aNextCenter(basegfx::utils::getRange(rSliceVector[(a + 1) % nNumSlices].getB3DPolyPolygon()).getCenter());
+ const double fLength(basegfx::B3DVector(aNextCenter - aCenter).getLength());
+ aTexHeightArray.push_back(fLength);
+ aCenter = aNextCenter;
+ }
+
+ const double fTexHeight(std::accumulate(aTexHeightArray.begin(), aTexHeightArray.end(), 0.0));
+
+ if(!basegfx::fTools::equalZero(fTexHeight))
+ {
+ fInvTexHeight = 1.0 / fTexHeight;
+ }
+ }
+
+ if(nLoopCount)
+ {
+ double fTexHeightPos(0.0);
+ for(a = 0; a < nLoopCount; a++)
+ {
+ const Slice3D& rSliceA(rSliceVector[a]);
+ const Slice3D& rSliceB(rSliceVector[(a + 1) % nNumSlices]);
+ const bool bAcceptPair(SLICETYPE3D_REGULAR == rSliceA.getSliceType() && SLICETYPE3D_REGULAR == rSliceB.getSliceType());
+ basegfx::B3DPolyPolygon aPolA(rSliceA.getB3DPolyPolygon());
+ basegfx::B3DPolyPolygon aPolB(rSliceB.getB3DPolyPolygon());
+
+ if(bAcceptPair)
+ {
+ if(bCreateNormals)
+ {
+ impCreateInBetweenNormals(aPolB, aPolA);
+ }
+
+ {
+ const sal_uInt32 nIndPrev((a + nNumSlices - 1) % nNumSlices);
+ const Slice3D& rSlicePrev(rSliceVector[nIndPrev]);
+ basegfx::B3DPolyPolygon aPrev(rSlicePrev.getB3DPolyPolygon());
+ basegfx::B3DPolyPolygon aPolAA(rSliceA.getB3DPolyPolygon());
+
+ if(SLICETYPE3D_FRONTCAP == rSlicePrev.getSliceType())
+ {
+ basegfx::B3DPolyPolygon aFront(rSlicePrev.getB3DPolyPolygon());
+ const bool bHasSlant(aPolAA != aPrev);
+
+ if(bCreateTextureCoordinates)
+ {
+ aFront = basegfx::utils::applyDefaultTextureCoordinatesParallel(aFront, aTexRangeFront);
+ }
+
+ if(bCreateNormals)
+ {
+ basegfx::B3DVector aNormal(0.0, 0.0, -1.0);
+
+ if(aFront.count())
+ {
+ aNormal = -aFront.getB3DPolygon(0).getNormal();
+ }
+
+ impSetNormal(aFront, aNormal);
+
+ if(bHasSlant)
+ {
+ impCreateInBetweenNormals(aPolAA, aPrev);
+
+ if(bSmoothNormals)
+ {
+ // smooth and copy
+ impMixNormals(aPolA, aPolAA, fSmoothNormalsMix);
+ aPolAA = aPolA;
+ }
+ else
+ {
+ // take over from surface
+ aPolAA = aPolA;
+ }
+
+ if(bSmoothLids)
+ {
+ // smooth and copy
+ impMixNormals(aFront, aPrev, fSmoothLidsMix);
+ aPrev = aFront;
+ }
+ else
+ {
+ // take over from front
+ aPrev = aFront;
+ }
+ }
+ else
+ {
+ if(bSmoothNormals)
+ {
+ // smooth
+ impMixNormals(aPolA, aFront, fSmoothNormalsMix);
+ }
+
+ if(bSmoothLids)
+ {
+ // smooth and copy
+ impMixNormals(aFront, aPolA, fSmoothLidsMix);
+ aPolA = aFront;
+ }
+ }
+ }
+
+ if(bHasSlant)
+ {
+ double fTexStart{};
+ double fTexStop{};
+ if(bCreateTextureCoordinates)
+ {
+ fTexStart = fTexHeightPos * fInvTexHeight;
+ fTexStop = (fTexHeightPos - aTexHeightArray[(a + nLoopCount - 1) % nLoopCount]) * fInvTexHeight;
+ }
+
+ impAddInBetweenFill(aEdgeRounding, aPolAA, aPrev, fTexStart, fTexStop, bCreateNormals, bCreateTextureCoordinates);
+ }
+
+ aFront.flip();
+ rFill.push_back(aFront);
+ }
+ else
+ {
+ if(bCreateNormals && bSmoothNormals && (nIndPrev != a + 1))
+ {
+ impCreateInBetweenNormals(aPolAA, aPrev);
+ impMixNormals(aPolA, aPolAA, 0.5);
+ }
+ }
+ }
+
+ {
+ const sal_uInt32 nIndNext((a + 2) % nNumSlices);
+ const Slice3D& rSliceNext(rSliceVector[nIndNext]);
+ basegfx::B3DPolyPolygon aNext(rSliceNext.getB3DPolyPolygon());
+ basegfx::B3DPolyPolygon aPolBB(rSliceB.getB3DPolyPolygon());
+
+ if(SLICETYPE3D_BACKCAP == rSliceNext.getSliceType())
+ {
+ basegfx::B3DPolyPolygon aBack(rSliceNext.getB3DPolyPolygon());
+ const bool bHasSlant(aPolBB != aNext);
+
+ if(bCreateTextureCoordinates)
+ {
+ aBack = basegfx::utils::applyDefaultTextureCoordinatesParallel(aBack, aTexRangeBack);
+ }
+
+ if(bCreateNormals)
+ {
+ const basegfx::B3DVector aNormal(aBack.count() ? aBack.getB3DPolygon(0).getNormal() : basegfx::B3DVector(0.0, 0.0, 1.0));
+ impSetNormal(aBack, aNormal);
+
+ if(bHasSlant)
+ {
+ impCreateInBetweenNormals(aNext, aPolBB);
+
+ if(bSmoothNormals)
+ {
+ // smooth and copy
+ impMixNormals(aPolB, aPolBB, fSmoothNormalsMix);
+ aPolBB = aPolB;
+ }
+ else
+ {
+ // take over from surface
+ aPolBB = aPolB;
+ }
+
+ if(bSmoothLids)
+ {
+ // smooth and copy
+ impMixNormals(aBack, aNext, fSmoothLidsMix);
+ aNext = aBack;
+ }
+ else
+ {
+ // take over from back
+ aNext = aBack;
+ }
+ }
+ else
+ {
+ if(bSmoothNormals)
+ {
+ // smooth
+ impMixNormals(aPolB, aBack, fSmoothNormalsMix);
+ }
+
+ if(bSmoothLids)
+ {
+ // smooth and copy
+ impMixNormals(aBack, aPolB, fSmoothLidsMix);
+ aPolB = aBack;
+ }
+ }
+ }
+
+ if(bHasSlant)
+ {
+ double fTexStart{};
+ double fTexStop{};
+ if(bCreateTextureCoordinates)
+ {
+ fTexStart = (fTexHeightPos + aTexHeightArray[a] + aTexHeightArray[(a + 1) % nLoopCount]) * fInvTexHeight;
+ fTexStop = (fTexHeightPos + aTexHeightArray[a]) * fInvTexHeight;
+ }
+
+ impAddInBetweenFill(aEdgeRounding, aNext, aPolBB, fTexStart, fTexStop, bCreateNormals, bCreateTextureCoordinates);
+ }
+
+ rFill.push_back(aBack);
+ }
+ else
+ {
+ if(bCreateNormals && bSmoothNormals && (nIndNext != a))
+ {
+ impCreateInBetweenNormals(aNext, aPolBB);
+ impMixNormals(aPolB, aPolBB, 0.5);
+ }
+ }
+ }
+
+ double fTexStart{};
+ double fTexStop{};
+ if(bCreateTextureCoordinates)
+ {
+ fTexStart = (fTexHeightPos + aTexHeightArray[a]) * fInvTexHeight;
+ fTexStop = fTexHeightPos * fInvTexHeight;
+ }
+
+ impAddInBetweenFill(aEdgeRounding, aPolB, aPolA, fTexStart, fTexStop, bCreateNormals, bCreateTextureCoordinates);
+ }
+
+ if(bCreateTextureCoordinates)
+ {
+ fTexHeightPos += aTexHeightArray[a];
+ }
+ }
+ }
+ else
+ {
+ // no loop, but a single slice (1 == nNumSlices), create a filling from the single
+ // front plane
+ const Slice3D& rSlice(rSliceVector[0]);
+ basegfx::B3DPolyPolygon aFront(rSlice.getB3DPolyPolygon());
+
+ if(bCreateTextureCoordinates)
+ {
+ aFront = basegfx::utils::applyDefaultTextureCoordinatesParallel(aFront, aTexRangeFront);
+ }
+
+ if(bCreateNormals)
+ {
+ basegfx::B3DVector aNormal(0.0, 0.0, -1.0);
+
+ if(aFront.count())
+ {
+ aNormal = -aFront.getB3DPolygon(0).getNormal();
+ }
+
+ impSetNormal(aFront, aNormal);
+ }
+
+ aFront.flip();
+ rFill.push_back(aFront);
+ }
+
+ if(bCreateTextureCoordinates)
+ {
+ aEdgeRounding.transformTextureCoordinates(rTexTransform);
+ }
+
+ for(a = 0; a < aEdgeRounding.count(); a++)
+ {
+ rFill.emplace_back(aEdgeRounding.getB3DPolygon(a));
+ }
+ }
+
+ void createReducedOutlines(
+ const geometry::ViewInformation3D& rViewInformation,
+ const basegfx::B3DHomMatrix& rObjectTransform,
+ const basegfx::B3DPolygon& rLoopA,
+ const basegfx::B3DPolygon& rLoopB,
+ basegfx::B3DPolyPolygon& rTarget)
+ {
+ const sal_uInt32 nPointCount(rLoopA.count());
+
+ // with identical polygons there are no outlines
+ if(rLoopA == rLoopB)
+ return;
+
+ if(!(nPointCount && nPointCount == rLoopB.count()))
+ return;
+
+ const basegfx::B3DHomMatrix aObjectTransform(rViewInformation.getObjectToView() * rObjectTransform);
+ const basegfx::B2DPolygon a2DLoopA(basegfx::utils::createB2DPolygonFromB3DPolygon(rLoopA, aObjectTransform));
+ const basegfx::B2DPolygon a2DLoopB(basegfx::utils::createB2DPolygonFromB3DPolygon(rLoopB, aObjectTransform));
+ const basegfx::B2DPoint a2DCenterA(a2DLoopA.getB2DRange().getCenter());
+ const basegfx::B2DPoint a2DCenterB(a2DLoopB.getB2DRange().getCenter());
+
+ // without detectable Y-Axis there are no outlines
+ if(a2DCenterA.equal(a2DCenterB))
+ return;
+
+ // search for outmost left and right inter-loop-edges which do not cut the loops
+ const basegfx::B2DPoint aCommonCenter(basegfx::average(a2DCenterA, a2DCenterB));
+ const basegfx::B2DVector aAxisVector(a2DCenterA - a2DCenterB);
+ double fMaxLeft(0.0);
+ double fMaxRight(0.0);
+ sal_uInt32 nIndexLeft(0);
+ sal_uInt32 nIndexRight(0);
+
+ for(sal_uInt32 a(0); a < nPointCount; a++)
+ {
+ const basegfx::B2DPoint aStart(a2DLoopA.getB2DPoint(a));
+ const basegfx::B2DPoint aEnd(a2DLoopB.getB2DPoint(a));
+ const basegfx::B2DPoint aMiddle(basegfx::average(aStart, aEnd));
+
+ if(!basegfx::utils::isInside(a2DLoopA, aMiddle))
+ {
+ if(!basegfx::utils::isInside(a2DLoopB, aMiddle))
+ {
+ if(!impHasCutWith(a2DLoopA, aStart, aEnd))
+ {
+ if(!impHasCutWith(a2DLoopB, aStart, aEnd))
+ {
+ const basegfx::B2DVector aCandidateVector(aMiddle - aCommonCenter);
+ const double fCross(aCandidateVector.cross(aAxisVector));
+ const double fDistance(aCandidateVector.getLength());
+
+ if(fCross > 0.0)
+ {
+ if(fDistance > fMaxLeft)
+ {
+ fMaxLeft = fDistance;
+ nIndexLeft = a;
+ }
+ }
+ else if(fCross < 0.0)
+ {
+ if(fDistance > fMaxRight)
+ {
+ fMaxRight = fDistance;
+ nIndexRight = a;
+ }
+ }
+ }
+ }
+ }
+ }
+ }
+
+ if(fMaxLeft != 0.0)
+ {
+ basegfx::B3DPolygon aToBeAdded;
+ aToBeAdded.append(rLoopA.getB3DPoint(nIndexLeft));
+ aToBeAdded.append(rLoopB.getB3DPoint(nIndexLeft));
+ rTarget.append(aToBeAdded);
+ }
+
+ if(fMaxRight != 0.0)
+ {
+ basegfx::B3DPolygon aToBeAdded;
+ aToBeAdded.append(rLoopA.getB3DPoint(nIndexRight));
+ aToBeAdded.append(rLoopB.getB3DPoint(nIndexRight));
+ rTarget.append(aToBeAdded);
+ }
+ }
+
+} // end of namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */