drawinglayer/source/primitive3d/hatchtextureprimitive3d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
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   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
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  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <primitive3d/hatchtextureprimitive3d.hxx>
  21 #include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
  22 #include <basegfx/polygon/b2dpolypolygon.hxx>
  23 #include <basegfx/polygon/b3dpolygon.hxx>
  24 #include <basegfx/polygon/b2dpolygon.hxx>
  25 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  26 #include <basegfx/range/b2drange.hxx>
  27 #include <texture/texture.hxx>
  28 #include <basegfx/polygon/b2dpolygonclipper.hxx>
  29 #include <basegfx/matrix/b3dhommatrix.hxx>
  30 #include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
  31 #include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
  32 #include <utility>
  33
  34
  35 using namespace com::sun::star;
  36
  37
  38 namespace drawinglayer::primitive3d
  39 {
  40         Primitive3DContainer HatchTexturePrimitive3D::impCreate3DDecomposition() const
  41         {
  42             Primitive3DContainer aRetval;
  43
  44             if(!getChildren().empty())
  45             {
  46                 const Primitive3DContainer aSource(getChildren());
  47                 const size_t nSourceCount(aSource.size());
  48                 std::vector< Primitive3DReference > aDestination;
  49
  50                 for(size_t a(0); a < nSourceCount; a++)
  51                 {
  52                     // get reference
  53                     const Primitive3DReference& xReference(aSource[a]);
  54
  55                     if(xReference.is())
  56                     {
  57                         const BasePrimitive3D* pBasePrimitive = static_cast< const BasePrimitive3D* >(xReference.get());
  58
  59                         // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
  60                         // not all content is needed, remove transparencies and ModifiedColorPrimitives
  61                         switch(pBasePrimitive->getPrimitive3DID())
  62                         {
  63                             case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
  64                             {
  65                                 // polyPolygonMaterialPrimitive3D, check texturing and hatching
  66                                 const PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const PolyPolygonMaterialPrimitive3D& >(*pBasePrimitive);
  67                                 const basegfx::B3DPolyPolygon& aFillPolyPolygon(rPrimitive.getB3DPolyPolygon());
  68
  69                                 if(maHatch.isFillBackground())
  70                                 {
  71                                     // add original primitive for background
  72                                     aDestination.push_back(xReference);
  73                                 }
  74
  75                                 if(aFillPolyPolygon.areTextureCoordinatesUsed())
  76                                 {
  77                                     const sal_uInt32 nPolyCount(aFillPolyPolygon.count());
  78                                     basegfx::B2DPolyPolygon aTexPolyPolygon;
  79                                     basegfx::B2DPoint a2N;
  80                                     basegfx::B2DVector a2X, a2Y;
  81                                     basegfx::B3DPoint a3N;
  82                                     basegfx::B3DVector a3X, a3Y;
  83                                     bool b2N(false), b2X(false), b2Y(false);
  84
  85                                     for(sal_uInt32 b(0); b < nPolyCount; b++)
  86                                     {
  87                                         const basegfx::B3DPolygon& aPartPoly(aFillPolyPolygon.getB3DPolygon(b));
  88                                         const sal_uInt32 nPointCount(aPartPoly.count());
  89                                         basegfx::B2DPolygon aTexPolygon;
  90
  91                                         for(sal_uInt32 c(0); c < nPointCount; c++)
  92                                         {
  93                                             const basegfx::B2DPoint a2Candidate(aPartPoly.getTextureCoordinate(c));
  94
  95                                             if(!b2N)
  96                                             {
  97                                                 a2N = a2Candidate;
  98                                                 a3N = aPartPoly.getB3DPoint(c);
  99                                                 b2N = true;
 100                                             }
 101                                             else if(!b2X && !a2N.equal(a2Candidate))
 102                                             {
 103                                                 a2X = a2Candidate - a2N;
 104                                                 a3X = aPartPoly.getB3DPoint(c) - a3N;
 105                                                 b2X = true;
 106                                             }
 107                                             else if(!b2Y && !a2N.equal(a2Candidate) && !a2X.equal(a2Candidate))
 108                                             {
 109                                                 a2Y = a2Candidate - a2N;
 110
 111                                                 const double fCross(a2X.cross(a2Y));
 112
 113                                                 if(!basegfx::fTools::equalZero(fCross))
 114                                                 {
 115                                                     a3Y = aPartPoly.getB3DPoint(c) - a3N;
 116                                                     b2Y = true;
 117                                                 }
 118                                             }
 119
 120                                             aTexPolygon.append(a2Candidate);
 121                                         }
 122
 123                                         aTexPolygon.setClosed(true);
 124                                         aTexPolyPolygon.append(aTexPolygon);
 125                                     }
 126
 127                                     if(b2N && b2X && b2Y)
 128                                     {
 129                                         // found two linearly independent 2D vectors
 130                                         // get 2d range of texture coordinates
 131                                         const basegfx::B2DRange aOutlineRange(basegfx::utils::getRange(aTexPolyPolygon));
 132                                         const basegfx::BColor aHatchColor(getHatch().getColor());
 133                                         const double fAngle(getHatch().getAngle());
 134                                         std::vector< basegfx::B2DHomMatrix > aMatrices;
 135
 136                                         // get hatch transformations
 137                                         switch(getHatch().getStyle())
 138                                         {
 139                                             case attribute::HatchStyle::Triple:
 140                                             {
 141                                                 // rotated 45 degrees
 142                                                 texture::GeoTexSvxHatch aHatch(
 143                                                     aOutlineRange,
 144                                                     aOutlineRange,
 145                                                     getHatch().getDistance(),
 146                                                     fAngle - M_PI_4);
 147
 148                                                 aHatch.appendTransformations(aMatrices);
 149
 150                                                 [[fallthrough]];
 151                                             }
 152                                             case attribute::HatchStyle::Double:
 153                                             {
 154                                                 // rotated 90 degrees
 155                                                 texture::GeoTexSvxHatch aHatch(
 156                                                     aOutlineRange,
 157                                                     aOutlineRange,
 158                                                     getHatch().getDistance(),
 159                                                     fAngle - M_PI_2);
 160
 161                                                 aHatch.appendTransformations(aMatrices);
 162
 163                                                 [[fallthrough]];
 164                                             }
 165                                             case attribute::HatchStyle::Single:
 166                                             {
 167                                                 // angle as given
 168                                                 texture::GeoTexSvxHatch aHatch(
 169                                                     aOutlineRange,
 170                                                     aOutlineRange,
 171                                                     getHatch().getDistance(),
 172                                                     fAngle);
 173
 174                                                 aHatch.appendTransformations(aMatrices);
 175                                             }
 176                                         }
 177
 178                                         // create geometry from unit line
 179                                         basegfx::B2DPolyPolygon a2DHatchLines;
 180                                         basegfx::B2DPolygon a2DUnitLine;
 181                                         a2DUnitLine.append(basegfx::B2DPoint(0.0, 0.0));
 182                                         a2DUnitLine.append(basegfx::B2DPoint(1.0, 0.0));
 183
 184                                         for(const basegfx::B2DHomMatrix & rMatrix : aMatrices)
 185                                         {
 186                                             basegfx::B2DPolygon aNewLine(a2DUnitLine);
 187                                             aNewLine.transform(rMatrix);
 188                                             a2DHatchLines.append(aNewLine);
 189                                         }
 190
 191                                         if(a2DHatchLines.count())
 192                                         {
 193                                             // clip against texture polygon
 194                                             a2DHatchLines = basegfx::utils::clipPolyPolygonOnPolyPolygon(a2DHatchLines, aTexPolyPolygon, true, true);
 195                                         }
 196
 197                                         if(a2DHatchLines.count())
 198                                         {
 199                                             // create 2d matrix with 2d vectors as column vectors and 2d point as offset, this represents
 200                                             // a coordinate system transformation from unit coordinates to the new coordinate system
 201                                             basegfx::B2DHomMatrix a2D;
 202                                             a2D.set(0, 0, a2X.getX());
 203                                             a2D.set(1, 0, a2X.getY());
 204                                             a2D.set(0, 1, a2Y.getX());
 205                                             a2D.set(1, 1, a2Y.getY());
 206                                             a2D.set(0, 2, a2N.getX());
 207                                             a2D.set(1, 2, a2N.getY());
 208
 209                                             // invert that transformation, so we have a back-transformation from texture coordinates
 210                                             // to unit coordinates
 211                                             a2D.invert();
 212                                             a2DHatchLines.transform(a2D);
 213
 214                                             // expand back-transformed geometry to 3D
 215                                             basegfx::B3DPolyPolygon a3DHatchLines(basegfx::utils::createB3DPolyPolygonFromB2DPolyPolygon(a2DHatchLines, 0.0));
 216
 217                                             // create 3d matrix with 3d vectors as column vectors (0,0,1 as Z) and 3d point as offset, this represents
 218                                             // a coordinate system transformation from unit coordinates to the object's 3d coordinate system
 219                                             basegfx::B3DHomMatrix a3D;
 220                                             a3D.set(0, 0, a3X.getX());
 221                                             a3D.set(1, 0, a3X.getY());
 222                                             a3D.set(2, 0, a3X.getZ());
 223                                             a3D.set(0, 1, a3Y.getX());
 224                                             a3D.set(1, 1, a3Y.getY());
 225                                             a3D.set(2, 1, a3Y.getZ());
 226                                             a3D.set(0, 3, a3N.getX());
 227                                             a3D.set(1, 3, a3N.getY());
 228                                             a3D.set(2, 3, a3N.getZ());
 229
 230                                             // transform hatch lines to 3D object coordinates
 231                                             a3DHatchLines.transform(a3D);
 232
 233                                             // build primitives from this geometry
 234                                             const sal_uInt32 nHatchLines(a3DHatchLines.count());
 235
 236                                             for(sal_uInt32 d(0); d < nHatchLines; d++)
 237                                             {
 238                                                 const Primitive3DReference xRef(new PolygonHairlinePrimitive3D(a3DHatchLines.getB3DPolygon(d), aHatchColor));
 239                                                 aDestination.push_back(xRef);
 240                                             }
 241                                         }
 242                                     }
 243                                 }
 244
 245                                 break;
 246                             }
 247                             default :
 248                             {
 249                                 // add reference to result
 250                                 aDestination.push_back(xReference);
 251                                 break;
 252                             }
 253                         }
 254                     }
 255                 }
 256
 257                 // prepare return value
 258                 const sal_uInt32 nDestSize(aDestination.size());
 259                 aRetval.resize(nDestSize);
 260
 261                 for(sal_uInt32 b(0); b < nDestSize; b++)
 262                 {
 263                     aRetval[b] = aDestination[b];
 264                 }
 265             }
 266
 267             return aRetval;
 268         }
 269
 270         HatchTexturePrimitive3D::HatchTexturePrimitive3D(
 271             attribute::FillHatchAttribute aHatch,
 272             const Primitive3DContainer& rChildren,
 273             const basegfx::B2DVector& rTextureSize,
 274             bool bModulate,
 275             bool bFilter)
 276         :   TexturePrimitive3D(rChildren, rTextureSize, bModulate, bFilter),
 277             maHatch(std::move(aHatch))
 278         {
 279         }
 280
 281         bool HatchTexturePrimitive3D::operator==(const BasePrimitive3D& rPrimitive) const
 282         {
 283             if(TexturePrimitive3D::operator==(rPrimitive))
 284             {
 285                 const HatchTexturePrimitive3D& rCompare = static_cast<const HatchTexturePrimitive3D&>(rPrimitive);
 286
 287                 return (getHatch() == rCompare.getHatch());
 288             }
 289
 290             return false;
 291         }
 292
 293         Primitive3DContainer HatchTexturePrimitive3D::get3DDecomposition(const geometry::ViewInformation3D& /*rViewInformation*/) const
 294         {
 295             std::unique_lock aGuard( m_aMutex );
 296
 297             if(getBuffered3DDecomposition().empty())
 298             {
 299                 const Primitive3DContainer aNewSequence(impCreate3DDecomposition());
 300                 const_cast< HatchTexturePrimitive3D* >(this)->maBuffered3DDecomposition = aNewSequence;
 301             }
 302
 303             return getBuffered3DDecomposition();
 304         }
 305
 306         // provide unique ID
 307         ImplPrimitive3DIDBlock(HatchTexturePrimitive3D, PRIMITIVE3D_ID_HATCHTEXTUREPRIMITIVE3D)
 308
 309 } // end of namespace
 310
 311 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */