drawinglayer/source/primitive3d/hatchtextureprimitive3d.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
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  19
  20 #include <drawinglayer/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 <drawinglayer/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
  33
  34 using namespace com::sun::star;
  35
  36
  37 namespace drawinglayer
  38 {
  39     namespace primitive3d
  40     {
  41         Primitive3DContainer HatchTexturePrimitive3D::impCreate3DDecomposition() const
  42         {
  43             Primitive3DContainer aRetval;
  44
  45             if(!getChildren().empty())
  46             {
  47                 const Primitive3DContainer aSource(getChildren());
  48                 const size_t nSourceCount(aSource.size());
  49                 std::vector< Primitive3DReference > aDestination;
  50
  51                 for(size_t a(0); a < nSourceCount; a++)
  52                 {
  53                     // get reference
  54                     const Primitive3DReference xReference(aSource[a]);
  55
  56                     if(xReference.is())
  57                     {
  58                         // try to cast to BasePrimitive2D implementation
  59                         const BasePrimitive3D* pBasePrimitive = dynamic_cast< const BasePrimitive3D* >(xReference.get());
  60
  61                         if(pBasePrimitive)
  62                         {
  63                             // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
  64                             // not all content is needed, remove transparencies and ModifiedColorPrimitives
  65                             switch(pBasePrimitive->getPrimitive3DID())
  66                             {
  67                                 case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
  68                                 {
  69                                     // polyPolygonMaterialPrimitive3D, check texturing and hatching
  70                                     const PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const PolyPolygonMaterialPrimitive3D& >(*pBasePrimitive);
  71                                     const basegfx::B3DPolyPolygon& aFillPolyPolygon(rPrimitive.getB3DPolyPolygon());
  72
  73                                     if(maHatch.isFillBackground())
  74                                     {
  75                                         // add original primitive for background
  76                                         aDestination.push_back(xReference);
  77                                     }
  78
  79                                     if(aFillPolyPolygon.areTextureCoordinatesUsed())
  80                                     {
  81                                         const sal_uInt32 nPolyCount(aFillPolyPolygon.count());
  82                                         basegfx::B2DPolyPolygon aTexPolyPolygon;
  83                                         basegfx::B2DPoint a2N;
  84                                         basegfx::B2DVector a2X, a2Y;
  85                                         basegfx::B3DPoint a3N;
  86                                         basegfx::B3DVector a3X, a3Y;
  87                                         bool b2N(false), b2X(false), b2Y(false);
  88
  89                                         for(sal_uInt32 b(0); b < nPolyCount; b++)
  90                                         {
  91                                             const basegfx::B3DPolygon& aPartPoly(aFillPolyPolygon.getB3DPolygon(b));
  92                                             const sal_uInt32 nPointCount(aPartPoly.count());
  93                                             basegfx::B2DPolygon aTexPolygon;
  94
  95                                             for(sal_uInt32 c(0); c < nPointCount; c++)
  96                                             {
  97                                                 const basegfx::B2DPoint a2Candidate(aPartPoly.getTextureCoordinate(c));
  98
  99                                                 if(!b2N)
 100                                                 {
 101                                                     a2N = a2Candidate;
 102                                                     a3N = aPartPoly.getB3DPoint(c);
 103                                                     b2N = true;
 104                                                 }
 105                                                 else if(!b2X && !a2N.equal(a2Candidate))
 106                                                 {
 107                                                     a2X = a2Candidate - a2N;
 108                                                     a3X = aPartPoly.getB3DPoint(c) - a3N;
 109                                                     b2X = true;
 110                                                 }
 111                                                 else if(!b2Y && !a2N.equal(a2Candidate) && !a2X.equal(a2Candidate))
 112                                                 {
 113                                                     a2Y = a2Candidate - a2N;
 114
 115                                                     const double fCross(a2X.cross(a2Y));
 116
 117                                                     if(!basegfx::fTools::equalZero(fCross))
 118                                                     {
 119                                                         a3Y = aPartPoly.getB3DPoint(c) - a3N;
 120                                                         b2Y = true;
 121                                                     }
 122                                                 }
 123
 124                                                 aTexPolygon.append(a2Candidate);
 125                                             }
 126
 127                                             aTexPolygon.setClosed(true);
 128                                             aTexPolyPolygon.append(aTexPolygon);
 129                                         }
 130
 131                                         if(b2N && b2X && b2Y)
 132                                         {
 133                                             // found two linearly independent 2D vectors
 134                                             // get 2d range of texture coordinates
 135                                             const basegfx::B2DRange aOutlineRange(basegfx::utils::getRange(aTexPolyPolygon));
 136                                             const basegfx::BColor aHatchColor(getHatch().getColor());
 137                                             const double fAngle(getHatch().getAngle());
 138                                             std::vector< basegfx::B2DHomMatrix > aMatrices;
 139
 140                                             // get hatch transformations
 141                                             switch(getHatch().getStyle())
 142                                             {
 143                                                 case attribute::HatchStyle::Triple:
 144                                                 {
 145                                                     // rotated 45 degrees
 146                                                     texture::GeoTexSvxHatch aHatch(
 147                                                         aOutlineRange,
 148                                                         aOutlineRange,
 149                                                         getHatch().getDistance(),
 150                                                         fAngle - F_PI4);
 151
 152                                                     aHatch.appendTransformations(aMatrices);
 153
 154                                                     [[fallthrough]];
 155                                                 }
 156                                                 case attribute::HatchStyle::Double:
 157                                                 {
 158                                                     // rotated 90 degrees
 159                                                     texture::GeoTexSvxHatch aHatch(
 160                                                         aOutlineRange,
 161                                                         aOutlineRange,
 162                                                         getHatch().getDistance(),
 163                                                         fAngle - F_PI2);
 164
 165                                                     aHatch.appendTransformations(aMatrices);
 166
 167                                                     [[fallthrough]];
 168                                                 }
 169                                                 case attribute::HatchStyle::Single:
 170                                                 {
 171                                                     // angle as given
 172                                                     texture::GeoTexSvxHatch aHatch(
 173                                                         aOutlineRange,
 174                                                         aOutlineRange,
 175                                                         getHatch().getDistance(),
 176                                                         fAngle);
 177
 178                                                     aHatch.appendTransformations(aMatrices);
 179                                                 }
 180                                             }
 181
 182                                             // create geometry from unit line
 183                                             basegfx::B2DPolyPolygon a2DHatchLines;
 184                                             basegfx::B2DPolygon a2DUnitLine;
 185                                             a2DUnitLine.append(basegfx::B2DPoint(0.0, 0.0));
 186                                             a2DUnitLine.append(basegfx::B2DPoint(1.0, 0.0));
 187
 188                                             for(const basegfx::B2DHomMatrix & rMatrix : aMatrices)
 189                                             {
 190                                                 basegfx::B2DPolygon aNewLine(a2DUnitLine);
 191                                                 aNewLine.transform(rMatrix);
 192                                                 a2DHatchLines.append(aNewLine);
 193                                             }
 194
 195                                             if(a2DHatchLines.count())
 196                                             {
 197                                                 // clip against texture polygon
 198                                                 a2DHatchLines = basegfx::utils::clipPolyPolygonOnPolyPolygon(a2DHatchLines, aTexPolyPolygon, true, true);
 199                                             }
 200
 201                                             if(a2DHatchLines.count())
 202                                             {
 203                                                 // create 2d matrix with 2d vectors as column vectors and 2d point as offset, this represents
 204                                                 // a coordinate system transformation from unit coordinates to the new coordinate system
 205                                                 basegfx::B2DHomMatrix a2D;
 206                                                 a2D.set(0, 0, a2X.getX());
 207                                                 a2D.set(1, 0, a2X.getY());
 208                                                 a2D.set(0, 1, a2Y.getX());
 209                                                 a2D.set(1, 1, a2Y.getY());
 210                                                 a2D.set(0, 2, a2N.getX());
 211                                                 a2D.set(1, 2, a2N.getY());
 212
 213                                                 // invert that transformation, so we have a back-transformation from texture coordinates
 214                                                 // to unit coordinates
 215                                                 a2D.invert();
 216                                                 a2DHatchLines.transform(a2D);
 217
 218                                                 // expand back-transformed geometry to 3D
 219                                                 basegfx::B3DPolyPolygon a3DHatchLines(basegfx::utils::createB3DPolyPolygonFromB2DPolyPolygon(a2DHatchLines, 0.0));
 220
 221                                                 // create 3d matrix with 3d vectors as column vectors (0,0,1 as Z) and 3d point as offset, this represents
 222                                                 // a coordinate system transformation from unit coordinates to the object's 3d coordinate system
 223                                                 basegfx::B3DHomMatrix a3D;
 224                                                 a3D.set(0, 0, a3X.getX());
 225                                                 a3D.set(1, 0, a3X.getY());
 226                                                 a3D.set(2, 0, a3X.getZ());
 227                                                 a3D.set(0, 1, a3Y.getX());
 228                                                 a3D.set(1, 1, a3Y.getY());
 229                                                 a3D.set(2, 1, a3Y.getZ());
 230                                                 a3D.set(0, 3, a3N.getX());
 231                                                 a3D.set(1, 3, a3N.getY());
 232                                                 a3D.set(2, 3, a3N.getZ());
 233
 234                                                 // transform hatch lines to 3D object coordinates
 235                                                 a3DHatchLines.transform(a3D);
 236
 237                                                 // build primitives from this geometry
 238                                                 const sal_uInt32 nHatchLines(a3DHatchLines.count());
 239
 240                                                 for(sal_uInt32 d(0); d < nHatchLines; d++)
 241                                                 {
 242                                                     const Primitive3DReference xRef(new PolygonHairlinePrimitive3D(a3DHatchLines.getB3DPolygon(d), aHatchColor));
 243                                                     aDestination.push_back(xRef);
 244                                                 }
 245                                             }
 246                                         }
 247                                     }
 248
 249                                     break;
 250                                 }
 251                                 default :
 252                                 {
 253                                     // add reference to result
 254                                     aDestination.push_back(xReference);
 255                                     break;
 256                                 }
 257                             }
 258                         }
 259                         else
 260                         {
 261                             // unknown implementation, add to result
 262                             aDestination.push_back(xReference);
 263                         }
 264                     }
 265                 }
 266
 267                 // prepare return value
 268                 const sal_uInt32 nDestSize(aDestination.size());
 269                 aRetval.resize(nDestSize);
 270
 271                 for(sal_uInt32 b(0); b < nDestSize; b++)
 272                 {
 273                     aRetval[b] = aDestination[b];
 274                 }
 275             }
 276
 277             return aRetval;
 278         }
 279
 280         HatchTexturePrimitive3D::HatchTexturePrimitive3D(
 281             const attribute::FillHatchAttribute& rHatch,
 282             const Primitive3DContainer& rChildren,
 283             const basegfx::B2DVector& rTextureSize,
 284             bool bModulate,
 285             bool bFilter)
 286         :   TexturePrimitive3D(rChildren, rTextureSize, bModulate, bFilter),
 287             maHatch(rHatch),
 288             maBuffered3DDecomposition()
 289         {
 290         }
 291
 292         bool HatchTexturePrimitive3D::operator==(const BasePrimitive3D& rPrimitive) const
 293         {
 294             if(TexturePrimitive3D::operator==(rPrimitive))
 295             {
 296                 const HatchTexturePrimitive3D& rCompare = static_cast<const HatchTexturePrimitive3D&>(rPrimitive);
 297
 298                 return (getHatch() == rCompare.getHatch());
 299             }
 300
 301             return false;
 302         }
 303
 304         Primitive3DContainer HatchTexturePrimitive3D::get3DDecomposition(const geometry::ViewInformation3D& /*rViewInformation*/) const
 305         {
 306             ::osl::MutexGuard aGuard( m_aMutex );
 307
 308             if(getBuffered3DDecomposition().empty())
 309             {
 310                 const Primitive3DContainer aNewSequence(impCreate3DDecomposition());
 311                 const_cast< HatchTexturePrimitive3D* >(this)->maBuffered3DDecomposition = aNewSequence;
 312             }
 313
 314             return getBuffered3DDecomposition();
 315         }
 316
 317         // provide unique ID
 318         ImplPrimitive3DIDBlock(HatchTexturePrimitive3D, PRIMITIVE3D_ID_HATCHTEXTUREPRIMITIVE3D)
 319
 320     } // end of namespace primitive3d
 321 } // end of namespace drawinglayer
 322
 323 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */