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
  35 using namespace com::sun::star;
  36
  37 //////////////////////////////////////////////////////////////////////////////
  38
  39 namespace drawinglayer
  40 {
  41     namespace processor3d
  42     {
  43         // as tooling, the process() implementation takes over API handling and calls this
  44         // virtual render method when the primitive implementation is BasePrimitive3D-based.
  45         void Shadow3DExtractingProcessor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
  46         {
  47             // it is a BasePrimitive3D implementation, use getPrimitive3DID() call for switch
  48             switch(rCandidate.getPrimitive3DID())
  49             {
  50                 case PRIMITIVE3D_ID_SHADOWPRIMITIVE3D :
  51                 {
  52                     // shadow3d object. Call recursive with content and start conversion
  53                     const primitive3d::ShadowPrimitive3D& rPrimitive = static_cast< const primitive3d::ShadowPrimitive3D& >(rCandidate);
  54
  55                     // set new target
  56                     primitive2d::Primitive2DVector aNewSubList;
  57                     primitive2d::Primitive2DVector* pLastTargetSequence = mpPrimitive2DSequence;
  58                     mpPrimitive2DSequence = &aNewSubList;
  59
  60                     // activate convert
  61                     const bool bLastConvert(mbConvert);
  62                     mbConvert = true;
  63
  64                     // set projection flag
  65                     const bool bLastUseProjection(mbUseProjection);
  66                     mbUseProjection = rPrimitive.getShadow3D();
  67
  68                     // process content
  69                     process(rPrimitive.getChildren());
  70
  71                     // restore values
  72                     mbUseProjection = bLastUseProjection;
  73                     mbConvert = bLastConvert;
  74                     mpPrimitive2DSequence = pLastTargetSequence;
  75
  76                     // create 2d shadow primitive with result. This also fetches all entries
  77                     // from aNewSubList, so there is no need to delete them
  78                     primitive2d::BasePrimitive2D* pNew = new primitive2d::ShadowPrimitive2D(
  79                         rPrimitive.getShadowTransform(),
  80                         rPrimitive.getShadowColor(),
  81                         primitive2d::Primitive2DVectorToPrimitive2DSequence(aNewSubList));
  82
  83                     if(basegfx::fTools::more(rPrimitive.getShadowTransparence(), 0.0))
  84                     {
  85                         // create simpleTransparencePrimitive, add created primitives
  86                         const primitive2d::Primitive2DReference xRef(pNew);
  87                         const primitive2d::Primitive2DSequence aNewTransPrimitiveVector(&xRef, 1);
  88
  89                         pNew = new primitive2d::UnifiedTransparencePrimitive2D(
  90                             aNewTransPrimitiveVector,
  91                             rPrimitive.getShadowTransparence());
  92                     }
  93
  94                     mpPrimitive2DSequence->push_back(pNew);
  95
  96                     break;
  97                 }
  98                 case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
  99                 {
 100                     // transform group. Remember current transformations
 101                     const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
 102                     const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
 103
 104                     // create new transformation; add new object transform from right side
 105                     const geometry::ViewInformation3D aNewViewInformation3D(
 106                         aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
 107                         aLastViewInformation3D.getOrientation(),
 108                         aLastViewInformation3D.getProjection(),
 109                         aLastViewInformation3D.getDeviceToView(),
 110                         aLastViewInformation3D.getViewTime(),
 111                         aLastViewInformation3D.getExtendedInformationSequence());
 112                     updateViewInformation(aNewViewInformation3D);
 113
 114                     if(mbShadowProjectionIsValid)
 115                     {
 116                         // update buffered WorldToEye and EyeToView
 117                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 118                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 119                     }
 120
 121                     // let break down
 122                     process(rPrimitive.getChildren());
 123
 124                     // restore transformations
 125                     updateViewInformation(aLastViewInformation3D);
 126
 127                     if(mbShadowProjectionIsValid)
 128                     {
 129                         // update buffered WorldToEye and EyeToView
 130                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 131                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 132                     }
 133                     break;
 134                 }
 135                 case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
 136                 {
 137                     // PolygonHairlinePrimitive3D
 138                     if(mbConvert)
 139                     {
 140                         const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
 141                         basegfx::B2DPolygon a2DHairline;
 142
 143                         if(mbUseProjection)
 144                         {
 145                             if(mbShadowProjectionIsValid)
 146                             {
 147                                 a2DHairline = impDoShadowProjection(rPrimitive.getB3DPolygon());
 148                             }
 149                         }
 150                         else
 151                         {
 152                             a2DHairline = basegfx::tools::createB2DPolygonFromB3DPolygon(rPrimitive.getB3DPolygon(), getViewInformation3D().getObjectToView());
 153                         }
 154
 155                         if(a2DHairline.count())
 156                         {
 157                             a2DHairline.transform(getObjectTransformation());
 158                             mpPrimitive2DSequence->push_back(
 159                                 new primitive2d::PolygonHairlinePrimitive2D(
 160                                     a2DHairline,
 161                                     maPrimitiveColor));
 162                         }
 163                     }
 164                     break;
 165                 }
 166                 case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
 167                 {
 168                     // PolyPolygonMaterialPrimitive3D
 169                     if(mbConvert)
 170                     {
 171                         const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
 172                         basegfx::B2DPolyPolygon a2DFill;
 173
 174                         if(mbUseProjection)
 175                         {
 176                             if(mbShadowProjectionIsValid)
 177                             {
 178                                 a2DFill = impDoShadowProjection(rPrimitive.getB3DPolyPolygon());
 179                             }
 180                         }
 181                         else
 182                         {
 183                             a2DFill = basegfx::tools::createB2DPolyPolygonFromB3DPolyPolygon(rPrimitive.getB3DPolyPolygon(), getViewInformation3D().getObjectToView());
 184                         }
 185
 186                         if(a2DFill.count())
 187                         {
 188                             a2DFill.transform(getObjectTransformation());
 189                             mpPrimitive2DSequence->push_back(
 190                                 new primitive2d::PolyPolygonColorPrimitive2D(
 191                                     a2DFill,
 192                                     maPrimitiveColor));
 193                         }
 194                     }
 195                     break;
 196                 }
 197                 default :
 198                 {
 199                     // process recursively
 200                     process(rCandidate.get3DDecomposition(getViewInformation3D()));
 201                     break;
 202                 }
 203             }
 204         }
 205
 206         Shadow3DExtractingProcessor::Shadow3DExtractingProcessor(
 207             const geometry::ViewInformation3D& rViewInformation,
 208             const basegfx::B2DHomMatrix& rObjectTransformation,
 209             const basegfx::B3DVector& rLightNormal,
 210             double fShadowSlant,
 211             const basegfx::B3DRange& rContained3DRange)
 212         :   BaseProcessor3D(rViewInformation),
 213             maPrimitive2DSequence(),
 214             mpPrimitive2DSequence(&maPrimitive2DSequence),
 215             maObjectTransformation(rObjectTransformation),
 216             maWorldToEye(),
 217             maEyeToView(),
 218             maLightNormal(rLightNormal),
 219             maShadowPlaneNormal(),
 220             maPlanePoint(),
 221             mfLightPlaneScalar(0.0),
 222             maPrimitiveColor(),
 223             mbShadowProjectionIsValid(false),
 224             mbConvert(false),
 225             mbUseProjection(false)
 226         {
 227             // normalize light normal, get and normalize shadow plane normal and calculate scalar from it
 228             maLightNormal.normalize();
 229             maShadowPlaneNormal = basegfx::B3DVector(0.0, sin(fShadowSlant), cos(fShadowSlant));
 230             maShadowPlaneNormal.normalize();
 231             mfLightPlaneScalar = maLightNormal.scalar(maShadowPlaneNormal);
 232
 233             // use only when scalar is > 0.0, so the light is in front of the object
 234             if(basegfx::fTools::more(mfLightPlaneScalar, 0.0))
 235             {
 236                 // prepare buffered WorldToEye and EyeToView
 237                 maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 238                 maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 239
 240                 // calculate range to get front edge around which to rotate the shadow's projection
 241                 basegfx::B3DRange aContained3DRange(rContained3DRange);
 242                 aContained3DRange.transform(getWorldToEye());
 243                 maPlanePoint.setX(maShadowPlaneNormal.getX() < 0.0 ? aContained3DRange.getMinX() : aContained3DRange.getMaxX());
 244                 maPlanePoint.setY(maShadowPlaneNormal.getY() > 0.0 ? aContained3DRange.getMinY() : aContained3DRange.getMaxY());
 245                 maPlanePoint.setZ(aContained3DRange.getMinZ() - (aContained3DRange.getDepth() / 8.0));
 246
 247                 // set flag that shadow projection is prepared and allowed
 248                 mbShadowProjectionIsValid = true;
 249             }
 250         }
 251
 252         Shadow3DExtractingProcessor::~Shadow3DExtractingProcessor()
 253         {
 254             OSL_ENSURE(0 == maPrimitive2DSequence.size(),
 255                 "OOps, someone used Shadow3DExtractingProcessor, but did not fetch the results (!)");
 256             for(sal_uInt32 a(0); a < maPrimitive2DSequence.size(); a++)
 257             {
 258                 delete maPrimitive2DSequence[a];
 259             }
 260         }
 261
 262         basegfx::B2DPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolygon& rSource)
 263         {
 264             basegfx::B2DPolygon aRetval;
 265
 266             for(sal_uInt32 a(0L); a < rSource.count(); a++)
 267             {
 268                 // get point, transform to eye coordinate system
 269                 basegfx::B3DPoint aCandidate(rSource.getB3DPoint(a));
 270                 aCandidate *= getWorldToEye();
 271
 272                 // we are in eye coordinates
 273                 // ray is (aCandidate + fCut * maLightNormal)
 274                 // plane is (maPlanePoint, maShadowPlaneNormal)
 275                 // maLightNormal.scalar(maShadowPlaneNormal) is already in mfLightPlaneScalar and > 0.0
 276                 // get cut point of ray with shadow plane
 277                 const double fCut(basegfx::B3DVector(maPlanePoint - aCandidate).scalar(maShadowPlaneNormal) / mfLightPlaneScalar);
 278                 aCandidate += maLightNormal * fCut;
 279
 280                 // transform to view, use 2d coordinates
 281                 aCandidate *= getEyeToView();
 282                 aRetval.append(basegfx::B2DPoint(aCandidate.getX(), aCandidate.getY()));
 283             }
 284
 285             // copy closed flag
 286             aRetval.setClosed(rSource.isClosed());
 287
 288             return aRetval;
 289         }
 290
 291         basegfx::B2DPolyPolygon Shadow3DExtractingProcessor::impDoShadowProjection(const basegfx::B3DPolyPolygon& rSource)
 292         {
 293             basegfx::B2DPolyPolygon aRetval;
 294
 295             for(sal_uInt32 a(0L); a < rSource.count(); a++)
 296             {
 297                 aRetval.append(impDoShadowProjection(rSource.getB3DPolygon(a)));
 298             }
 299
 300             return aRetval;
 301         }
 302
 303         const primitive2d::Primitive2DSequence Shadow3DExtractingProcessor::getPrimitive2DSequence() const
 304         {
 305             return Primitive2DVectorToPrimitive2DSequence(maPrimitive2DSequence);
 306         }
 307
 308     } // end of namespace processor3d
 309 } // end of namespace drawinglayer
 310
 311 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */