drawinglayer/source/processor3d/shadow3dextractor.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 .
  18  */
  19
  20 #include <drawinglayer/processor3d/shadow3dextractor.hxx>
  21 #include <drawinglayer/primitive3d/shadowprimitive3d.hxx>
  22 #include <drawinglayer/primitive2d/shadowprimitive2d.hxx>
  23 #include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
  24 #include <drawinglayer/primitive3d/transformprimitive3d.hxx>
  25 #include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
  26 #include <basegfx/polygon/b2dpolygontools.hxx>
  27 #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
  28 #include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
  29 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  30 #include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
  31 #include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
  32
  33
  34 using namespace com::sun::star;
  35
  36
  37 namespace drawinglayer
  38 {
  39     namespace processor3d
  40     {
  41         // as tooling, the process() implementation takes over API handling and calls this
  42         // virtual render method when the primitive implementation is BasePrimitive3D-based.
  43         void Shadow3DExtractingProcessor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
  44         {
  45             // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
  46             switch(rCandidate.getPrimitive3DID())
  47             {
  48                 case PRIMITIVE3D_ID_SHADOWPRIMITIVE3D :
  49                 {
  50                     // shadow3d object. Call recursive with content and start conversion
  51                     const primitive3d::ShadowPrimitive3D& rPrimitive = static_cast< const primitive3d::ShadowPrimitive3D& >(rCandidate);
  52
  53                     // set new target
  54                     primitive2d::Primitive2DContainer aNewSubList;
  55                     primitive2d::Primitive2DContainer* pLastTargetSequence = mpPrimitive2DSequence;
  56                     mpPrimitive2DSequence = &aNewSubList;
  57
  58                     // activate convert
  59                     const bool bLastConvert(mbConvert);
  60                     mbConvert = true;
  61
  62                     // set projection flag
  63                     const bool bLastUseProjection(mbUseProjection);
  64                     mbUseProjection = rPrimitive.getShadow3D();
  65
  66                     // process content
  67                     process(rPrimitive.getChildren());
  68
  69                     // restore values
  70                     mbUseProjection = bLastUseProjection;
  71                     mbConvert = bLastConvert;
  72                     mpPrimitive2DSequence = pLastTargetSequence;
  73
  74                     // create 2d shadow primitive with result. This also fetches all entries
  75                     // from aNewSubList, so there is no need to delete them
  76                     primitive2d::BasePrimitive2D* pNew = new primitive2d::ShadowPrimitive2D(
  77                         rPrimitive.getShadowTransform(),
  78                         rPrimitive.getShadowColor(),
  79                         aNewSubList);
  80
  81                     if(basegfx::fTools::more(rPrimitive.getShadowTransparence(), 0.0))
  82                     {
  83                         // create simpleTransparencePrimitive, add created primitives
  84                         const primitive2d::Primitive2DReference xRef(pNew);
  85                         const primitive2d::Primitive2DContainer aNewTransPrimitiveVector { xRef };
  86
  87                         pNew = new primitive2d::UnifiedTransparencePrimitive2D(
  88                             aNewTransPrimitiveVector,
  89                             rPrimitive.getShadowTransparence());
  90                     }
  91
  92                     mpPrimitive2DSequence->push_back(pNew);
  93
  94                     break;
  95                 }
  96                 case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
  97                 {
  98                     // transform group. Remember current transformations
  99                     const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
 100                     const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
 101
 102                     // create new transformation; add new object transform from right side
 103                     const geometry::ViewInformation3D aNewViewInformation3D(
 104                         aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
 105                         aLastViewInformation3D.getOrientation(),
 106                         aLastViewInformation3D.getProjection(),
 107                         aLastViewInformation3D.getDeviceToView(),
 108                         aLastViewInformation3D.getViewTime(),
 109                         aLastViewInformation3D.getExtendedInformationSequence());
 110                     updateViewInformation(aNewViewInformation3D);
 111
 112                     if(mbShadowProjectionIsValid)
 113                     {
 114                         // update buffered WorldToEye and EyeToView
 115                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 116                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 117                     }
 118
 119                     // let break down
 120                     process(rPrimitive.getChildren());
 121
 122                     // restore transformations
 123                     updateViewInformation(aLastViewInformation3D);
 124
 125                     if(mbShadowProjectionIsValid)
 126                     {
 127                         // update buffered WorldToEye and EyeToView
 128                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 129                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 130                     }
 131                     break;
 132                 }
 133                 case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
 134                 {
 135                     // PolygonHairlinePrimitive3D
 136                     if(mbConvert)
 137                     {
 138                         const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
 139                         basegfx::B2DPolygon a2DHairline;
 140
 141                         if(mbUseProjection)
 142                         {
 143                             if(mbShadowProjectionIsValid)
 144                             {
 145                                 a2DHairline = impDoShadowProjection(rPrimitive.getB3DPolygon());
 146                             }
 147                         }
 148                         else
 149                         {
 150                             a2DHairline = basegfx::utils::createB2DPolygonFromB3DPolygon(rPrimitive.getB3DPolygon(), getViewInformation3D().getObjectToView());
 151                         }
 152
 153                         if(a2DHairline.count())
 154                         {
 155                             a2DHairline.transform(getObjectTransformation());
 156                             mpPrimitive2DSequence->push_back(
 157                                 new primitive2d::PolygonHairlinePrimitive2D(
 158                                     a2DHairline,
 159                                     basegfx::BColor()));
 160                         }
 161                     }
 162                     break;
 163                 }
 164                 case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
 165                 {
 166                     // PolyPolygonMaterialPrimitive3D
 167                     if(mbConvert)
 168                     {
 169                         const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
 170                         basegfx::B2DPolyPolygon a2DFill;
 171
 172                         if(mbUseProjection)
 173                         {
 174                             if(mbShadowProjectionIsValid)
 175                             {
 176                                 a2DFill = impDoShadowProjection(rPrimitive.getB3DPolyPolygon());
 177                             }
 178                         }
 179                         else
 180                         {
 181                             a2DFill = basegfx::utils::createB2DPolyPolygonFromB3DPolyPolygon(rPrimitive.getB3DPolyPolygon(), getViewInformation3D().getObjectToView());
 182                         }
 183
 184                         if(a2DFill.count())
 185                         {
 186                             a2DFill.transform(getObjectTransformation());
 187                             mpPrimitive2DSequence->push_back(
 188                                 new primitive2d::PolyPolygonColorPrimitive2D(
 189                                     a2DFill,
 190                                     basegfx::BColor()));
 191                         }
 192                     }
 193                     break;
 194                 }
 195                 default :
 196                 {
 197                     // process recursively
 198                     process(rCandidate.get3DDecomposition(getViewInformation3D()));
 199                     break;
 200                 }
 201             }
 202         }
 203
 204         Shadow3DExtractingProcessor::Shadow3DExtractingProcessor(
 205             const geometry::ViewInformation3D& rViewInformation,
 206             const basegfx::B2DHomMatrix& rObjectTransformation,
 207             const basegfx::B3DVector& rLightNormal,
 208             double fShadowSlant,
 209             const basegfx::B3DRange& rContained3DRange)
 210         :   BaseProcessor3D(rViewInformation),
 211             maPrimitive2DSequence(),
 212             mpPrimitive2DSequence(&maPrimitive2DSequence),
 213             maObjectTransformation(rObjectTransformation),
 214             maWorldToEye(),
 215             maEyeToView(),
 216             maLightNormal(rLightNormal),
 217             maShadowPlaneNormal(),
 218             maPlanePoint(),
 219             mfLightPlaneScalar(0.0),
 220             mbShadowProjectionIsValid(false),
 221             mbConvert(false),
 222             mbUseProjection(false)
 223         {
 224             // normalize light normal, get and normalize shadow plane normal and calculate scalar from it
 225             maLightNormal.normalize();
 226             maShadowPlaneNormal = basegfx::B3DVector(0.0, sin(fShadowSlant), cos(fShadowSlant));
 227             maShadowPlaneNormal.normalize();
 228             mfLightPlaneScalar = maLightNormal.scalar(maShadowPlaneNormal);
 229
 230             // use only when scalar is > 0.0, so the light is in front of the object
 231             if(basegfx::fTools::more(mfLightPlaneScalar, 0.0))
 232             {
 233                 // prepare buffered WorldToEye and EyeToView
 234                 maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 235                 maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 236
 237                 // calculate range to get front edge around which to rotate the shadow's projection
 238                 basegfx::B3DRange aContained3DRange(rContained3DRange);
 239                 aContained3DRange.transform(getWorldToEye());
 240                 maPlanePoint.setX(maShadowPlaneNormal.getX() < 0.0 ? aContained3DRange.getMinX() : aContained3DRange.getMaxX());
 241                 maPlanePoint.setY(maShadowPlaneNormal.getY() > 0.0 ? aContained3DRange.getMinY() : aContained3DRange.getMaxY());
 242                 maPlanePoint.setZ(aContained3DRange.getMinZ() - (aContained3DRange.getDepth() / 8.0));
 243
 244                 // set flag that shadow projection is prepared and allowed
 245                 mbShadowProjectionIsValid = true;
 246             }
 247         }
 248
 249         Shadow3DExtractingProcessor::~Shadow3DExtractingProcessor()
 250         {
 251             OSL_ENSURE(maPrimitive2DSequence.empty(),
 252                 "OOps, someone used Shadow3DExtractingProcessor, but did not fetch the results (!)");
 253         }
 254
 255         basegfx::B2DPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolygon& rSource)
 256         {
 257             basegfx::B2DPolygon aRetval;
 258
 259             for(sal_uInt32 a(0); a < rSource.count(); a++)
 260             {
 261                 // get point, transform to eye coordinate system
 262                 basegfx::B3DPoint aCandidate(rSource.getB3DPoint(a));
 263                 aCandidate *= getWorldToEye();
 264
 265                 // we are in eye coordinates
 266                 // ray is (aCandidate + fCut * maLightNormal)
 267                 // plane is (maPlanePoint, maShadowPlaneNormal)
 268                 // maLightNormal.scalar(maShadowPlaneNormal) is already in mfLightPlaneScalar and > 0.0
 269                 // get cut point of ray with shadow plane
 270                 const double fCut(basegfx::B3DVector(maPlanePoint - aCandidate).scalar(maShadowPlaneNormal) / mfLightPlaneScalar);
 271                 aCandidate += maLightNormal * fCut;
 272
 273                 // transform to view, use 2d coordinates
 274                 aCandidate *= maEyeToView;
 275                 aRetval.append(basegfx::B2DPoint(aCandidate.getX(), aCandidate.getY()));
 276             }
 277
 278             // copy closed flag
 279             aRetval.setClosed(rSource.isClosed());
 280
 281             return aRetval;
 282         }
 283
 284         basegfx::B2DPolyPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolyPolygon& rSource)
 285         {
 286             basegfx::B2DPolyPolygon aRetval;
 287
 288             for(sal_uInt32 a(0); a < rSource.count(); a++)
 289             {
 290                 aRetval.append(impDoShadowProjection(rSource.getB3DPolygon(a)));
 291             }
 292
 293             return aRetval;
 294         }
 295
 296         const primitive2d::Primitive2DContainer& Shadow3DExtractingProcessor::getPrimitive2DSequence() const
 297         {
 298             return maPrimitive2DSequence;
 299         }
 300
 301     } // end of namespace processor3d
 302 } // end of namespace drawinglayer
 303
 304 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */