include/drawinglayer/processor3d/shadow3dextractor.hxx

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  19
  20 #ifndef INCLUDED_DRAWINGLAYER_PROCESSOR3D_SHADOW3DEXTRACTOR_HXX
  21 #define INCLUDED_DRAWINGLAYER_PROCESSOR3D_SHADOW3DEXTRACTOR_HXX
  22
  23 #include <drawinglayer/drawinglayerdllapi.h>
  24
  25 #include <drawinglayer/processor3d/baseprocessor3d.hxx>
  26 #include <drawinglayer/primitive2d/baseprimitive2d.hxx>
  27 #include <basegfx/matrix/b3dhommatrix.hxx>
  28 #include <basegfx/polygon/b2dpolygon.hxx>
  29 #include <basegfx/polygon/b2dpolypolygon.hxx>
  30 #include <basegfx/matrix/b2dhommatrix.hxx>
  31
  32 namespace basegfx { class B3DPolyPolygon; }
  33 namespace basegfx { class B3DPolygon; }
  34
  35
  36 namespace drawinglayer
  37 {
  38     namespace processor3d
  39     {
  40         /** Shadow3DExtractingProcessor class
  41
  42             This processor extracts the 2D shadow geometry (projected geometry) of all fed primitives.
  43             It is used to create the shadow of 3D objects which consists of 2D geometry. It needs quite
  44             some data to do so since we do not only offer flat projected 2D shadow, but also projections
  45             dependent on the light source
  46          */
  47         class DRAWINGLAYER_DLLPUBLIC Shadow3DExtractingProcessor : public BaseProcessor3D
  48         {
  49         private:
  50             /// result holding vector (2D) and target vector for stacking (inited to &maPrimitive2DSequence)
  51             primitive2d::Primitive2DContainer                  maPrimitive2DSequence;
  52             primitive2d::Primitive2DContainer*                 mpPrimitive2DSequence;
  53
  54             /// object transformation for scene for 2d definition
  55             basegfx::B2DHomMatrix                           maObjectTransformation;
  56
  57             /// prepared data (transformations) for 2D/3D shadow calculations
  58             basegfx::B3DHomMatrix                           maWorldToEye;
  59             basegfx::B3DHomMatrix                           maEyeToView;
  60             basegfx::B3DVector                              maLightNormal;
  61             basegfx::B3DVector                              maShadowPlaneNormal;
  62             basegfx::B3DPoint                               maPlanePoint;
  63             double                                          mfLightPlaneScalar;
  64
  65             /// flag if shadow plane projection preparation led to valid results
  66             bool                                            mbShadowProjectionIsValid : 1;
  67
  68             /// flag if conversion is switched on
  69             bool                                            mbConvert : 1;
  70
  71             /// flag if conversion shall use projection
  72             bool                                            mbUseProjection : 1;
  73
  74             /// local helpers
  75             basegfx::B2DPolygon impDoShadowProjection(const basegfx::B3DPolygon& rSource);
  76             basegfx::B2DPolyPolygon impDoShadowProjection(const basegfx::B3DPolyPolygon& rSource);
  77
  78             /*  as tooling, the process() implementation takes over API handling and calls this
  79                 virtual render method when the primitive implementation is BasePrimitive3D-based.
  80              */
  81             virtual void processBasePrimitive3D(const primitive3d::BasePrimitive3D& rCandidate) override;
  82
  83         public:
  84             Shadow3DExtractingProcessor(
  85                 const geometry::ViewInformation3D& rViewInformation,
  86                 const basegfx::B2DHomMatrix& rObjectTransformation,
  87                 const basegfx::B3DVector& rLightNormal,
  88                 double fShadowSlant,
  89                 const basegfx::B3DRange& rContained3DRange);
  90             virtual ~Shadow3DExtractingProcessor() override;
  91
  92             /// data read access
  93             const primitive2d::Primitive2DContainer& getPrimitive2DSequence() const;
  94             const basegfx::B2DHomMatrix& getObjectTransformation() const { return maObjectTransformation; }
  95             const basegfx::B3DHomMatrix& getWorldToEye() const { return maWorldToEye; }
  96         };
  97     } // end of namespace processor3d
  98 } // end of namespace drawinglayer
  99
 100 #endif //_DRAWINGLAYER_PROCESSOR3D_SHADOW3DEXTRACTOR_HXX
 101
 102 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */