drawinglayer/source/processor3d/shadow3dextractor.cxx

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   5  *  $RCSfile: shadow3dextractor.cxx,v $
   6  *
   7  *  $Revision: 1.9 $
   8  *
   9  *  last change: $Author: aw $ $Date: 2008-06-24 15:31:09 $
  10  *
  11  *  The Contents of this file are made available subject to
  12  *  the terms of GNU Lesser General Public License Version 2.1.
  13  *
  14  *
  15  *    GNU Lesser General Public License Version 2.1
  16  *    =============================================
  17  *    Copyright 2005 by Sun Microsystems, Inc.
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  20  *    This library is free software; you can redistribute it and/or
  21  *    modify it under the terms of the GNU Lesser General Public
  22  *    License version 2.1, as published by the Free Software Foundation.
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  24  *    This library is distributed in the hope that it will be useful,
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  27  *    Lesser General Public License for more details.
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  31  *    Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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  34  ************************************************************************/
  35
  36 // MARKER(update_precomp.py): autogen include statement, do not remove
  37 #include "precompiled_drawinglayer.hxx"
  38
  39 #include <drawinglayer/processor3d/shadow3dextractor.hxx>
  40 #include <drawinglayer/primitive3d/shadowprimitive3d.hxx>
  41 #include <drawinglayer/primitive2d/shadowprimitive2d.hxx>
  42 #include <drawinglayer/primitive2d/unifiedalphaprimitive2d.hxx>
  43 #include <drawinglayer/primitive3d/transformprimitive3d.hxx>
  44 #include <drawinglayer/primitive3d/polygonprimitive3d.hxx>
  45 #include <basegfx/polygon/b2dpolygontools.hxx>
  46 #include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
  47 #include <drawinglayer/primitive3d/polypolygonprimitive3d.hxx>
  48 #include <basegfx/polygon/b2dpolypolygontools.hxx>
  49 #include <drawinglayer/primitive2d/polypolygonprimitive2d.hxx>
  50 #include <drawinglayer/primitive3d/drawinglayer_primitivetypes3d.hxx>
  51
  52 //////////////////////////////////////////////////////////////////////////////
  53
  54 using namespace com::sun::star;
  55
  56 //////////////////////////////////////////////////////////////////////////////
  57
  58 namespace drawinglayer
  59 {
  60     namespace processor3d
  61     {
  62         // as tooling, the process() implementation takes over API handling and calls this
  63         // virtual render method when the primitive implementation is BasePrimitive3D-based.
  64         void Shadow3DExtractingProcessor::processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate)
  65         {
  66             // it is a BasePrimitive3D implementation, use getPrimitiveID() call for switch
  67             switch(rCandidate.getPrimitiveID())
  68             {
  69                 case PRIMITIVE3D_ID_SHADOWPRIMITIVE3D :
  70                 {
  71                     // shadow3d object. Call recursive with content and start conversion
  72                     const primitive3d::ShadowPrimitive3D& rPrimitive = static_cast< const primitive3d::ShadowPrimitive3D& >(rCandidate);
  73
  74                     // set new target
  75                     primitive2d::Primitive2DSequence aNewSubList;
  76                     primitive2d::Primitive2DSequence* pLastTargetSequence = mpPrimitive2DSequence;
  77                     mpPrimitive2DSequence = &aNewSubList;
  78
  79                     // activate convert
  80                     const bool bLastConvert(mbConvert);
  81                     mbConvert = true;
  82
  83                     // set projection flag
  84                     const bool bLastUseProjection(mbUseProjection);
  85                     mbUseProjection = rPrimitive.getShadow3D();
  86
  87                     // process content
  88                     process(rPrimitive.getChildren());
  89
  90                     // restore values
  91                     mbUseProjection = bLastUseProjection;
  92                     mbConvert = bLastConvert;
  93                     mpPrimitive2DSequence = pLastTargetSequence;
  94
  95                     // create 2d shadow primitive with result
  96                     const primitive2d::Primitive2DReference xRef(new primitive2d::ShadowPrimitive2D(rPrimitive.getShadowTransform(), rPrimitive.getShadowColor(), aNewSubList));
  97
  98                     if(basegfx::fTools::more(rPrimitive.getShadowTransparence(), 0.0))
  99                     {
 100                         // create simpleTransparencePrimitive, add created primitives
 101                         const primitive2d::Primitive2DSequence aNewTransPrimitiveVector(&xRef, 1L);
 102                         const primitive2d::Primitive2DReference xRef2(new primitive2d::UnifiedAlphaPrimitive2D(aNewTransPrimitiveVector, rPrimitive.getShadowTransparence()));
 103                         primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(*mpPrimitive2DSequence, xRef2);
 104                     }
 105                     else
 106                     {
 107                         // add directly
 108                         primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(*mpPrimitive2DSequence, xRef);
 109                     }
 110                     break;
 111                 }
 112                 case PRIMITIVE3D_ID_TRANSFORMPRIMITIVE3D :
 113                 {
 114                     // transform group. Remember current transformations
 115                     const primitive3d::TransformPrimitive3D& rPrimitive = static_cast< const primitive3d::TransformPrimitive3D& >(rCandidate);
 116                     const geometry::ViewInformation3D aLastViewInformation3D(getViewInformation3D());
 117
 118                     // create new transformation; add new object transform from right side
 119                     const geometry::ViewInformation3D aNewViewInformation3D(
 120                         aLastViewInformation3D.getObjectTransformation() * rPrimitive.getTransformation(),
 121                         aLastViewInformation3D.getOrientation(),
 122                         aLastViewInformation3D.getProjection(),
 123                         aLastViewInformation3D.getDeviceToView(),
 124                         aLastViewInformation3D.getViewTime(),
 125                         aLastViewInformation3D.getExtendedInformationSequence());
 126                     updateViewInformation(aNewViewInformation3D);
 127
 128                     if(mbShadowProjectionIsValid)
 129                     {
 130                         // update buffered WorldToEye and EyeToView
 131                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 132                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 133                     }
 134
 135                     // let break down
 136                     process(rPrimitive.getChildren());
 137
 138                     // restore transformations
 139                     updateViewInformation(aLastViewInformation3D);
 140
 141                     if(mbShadowProjectionIsValid)
 142                     {
 143                         // update buffered WorldToEye and EyeToView
 144                         maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 145                         maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 146                     }
 147                     break;
 148                 }
 149                 case PRIMITIVE3D_ID_POLYGONHAIRLINEPRIMITIVE3D :
 150                 {
 151                     // PolygonHairlinePrimitive3D
 152                     if(mbConvert)
 153                     {
 154                         const primitive3d::PolygonHairlinePrimitive3D& rPrimitive = static_cast< const primitive3d::PolygonHairlinePrimitive3D& >(rCandidate);
 155                         basegfx::B2DPolygon a2DHairline;
 156
 157                         if(mbUseProjection)
 158                         {
 159                             if(mbShadowProjectionIsValid)
 160                             {
 161                                 a2DHairline = impDoShadowProjection(rPrimitive.getB3DPolygon());
 162                             }
 163                         }
 164                         else
 165                         {
 166                             a2DHairline = basegfx::tools::createB2DPolygonFromB3DPolygon(rPrimitive.getB3DPolygon(), getViewInformation3D().getObjectToView());
 167                         }
 168
 169                         if(a2DHairline.count())
 170                         {
 171                             a2DHairline.transform(getObjectTransformation());
 172                             const primitive2d::Primitive2DReference xRef(new primitive2d::PolygonHairlinePrimitive2D(a2DHairline, maPrimitiveColor));
 173                             primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(*mpPrimitive2DSequence, xRef);
 174                         }
 175                     }
 176                     break;
 177                 }
 178                 case PRIMITIVE3D_ID_POLYPOLYGONMATERIALPRIMITIVE3D :
 179                 {
 180                     // PolyPolygonMaterialPrimitive3D
 181                     if(mbConvert)
 182                     {
 183                         const primitive3d::PolyPolygonMaterialPrimitive3D& rPrimitive = static_cast< const primitive3d::PolyPolygonMaterialPrimitive3D& >(rCandidate);
 184                         basegfx::B2DPolyPolygon a2DFill;
 185
 186                         if(mbUseProjection)
 187                         {
 188                             if(mbShadowProjectionIsValid)
 189                             {
 190                                 a2DFill = impDoShadowProjection(rPrimitive.getB3DPolyPolygon());
 191                             }
 192                         }
 193                         else
 194                         {
 195                             a2DFill = basegfx::tools::createB2DPolyPolygonFromB3DPolyPolygon(rPrimitive.getB3DPolyPolygon(), getViewInformation3D().getObjectToView());
 196                         }
 197
 198                         if(a2DFill.count())
 199                         {
 200                             a2DFill.transform(getObjectTransformation());
 201                             const primitive2d::Primitive2DReference xRef(new primitive2d::PolyPolygonColorPrimitive2D(a2DFill, maPrimitiveColor));
 202                             primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(*mpPrimitive2DSequence, xRef);
 203                         }
 204                     }
 205                     break;
 206                 }
 207                 default :
 208                 {
 209                     // process recursively
 210                     process(rCandidate.get3DDecomposition(getViewInformation3D()));
 211                     break;
 212                 }
 213             }
 214         }
 215
 216         Shadow3DExtractingProcessor::Shadow3DExtractingProcessor(
 217             const geometry::ViewInformation3D& rViewInformation,
 218             const basegfx::B2DHomMatrix& rObjectTransformation,
 219             const basegfx::B3DVector& rLightNormal,
 220             double fShadowSlant,
 221             const basegfx::B3DRange& rContained3DRange)
 222         :       BaseProcessor3D(rViewInformation),
 223             maPrimitive2DSequence(),
 224             mpPrimitive2DSequence(&maPrimitive2DSequence),
 225             maObjectTransformation(rObjectTransformation),
 226             maWorldToEye(),
 227             maEyeToView(),
 228             maLightNormal(rLightNormal),
 229             maShadowPlaneNormal(),
 230             maPlanePoint(),
 231             mfLightPlaneScalar(0.0),
 232             maPrimitiveColor(),
 233             mbShadowProjectionIsValid(false),
 234             mbConvert(false),
 235             mbUseProjection(false)
 236         {
 237             // normalize light normal, get and normalize shadow plane normal and calculate scalar from it
 238             maLightNormal.normalize();
 239             maShadowPlaneNormal = basegfx::B3DVector(0.0, sin(fShadowSlant), cos(fShadowSlant));
 240             maShadowPlaneNormal.normalize();
 241             mfLightPlaneScalar = maLightNormal.scalar(maShadowPlaneNormal);
 242
 243             // use only when scalar is > 0.0, so the light is in front of the object
 244             if(basegfx::fTools::more(mfLightPlaneScalar, 0.0))
 245             {
 246                 // prepare buffered WorldToEye and EyeToView
 247                 maWorldToEye = getViewInformation3D().getOrientation() * getViewInformation3D().getObjectTransformation();
 248                 maEyeToView = getViewInformation3D().getDeviceToView() * getViewInformation3D().getProjection();
 249
 250                 // calculate range to get front edge around which to rotate the shadow's projection
 251                 basegfx::B3DRange aContained3DRange(rContained3DRange);
 252                 aContained3DRange.transform(getWorldToEye());
 253                 maPlanePoint.setX(maShadowPlaneNormal.getX() < 0.0 ? aContained3DRange.getMinX() : aContained3DRange.getMaxX());
 254                 maPlanePoint.setY(maShadowPlaneNormal.getY() > 0.0 ? aContained3DRange.getMinY() : aContained3DRange.getMaxY());
 255                 maPlanePoint.setZ(aContained3DRange.getMinZ() - (aContained3DRange.getDepth() / 8.0));
 256
 257                 // set flag that shadow projection is prepared and allowed
 258                 mbShadowProjectionIsValid = true;
 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     } // end of namespace processor3d
 303 } // end of namespace drawinglayer
 304
 305 //////////////////////////////////////////////////////////////////////////////
 306 // eof