drawinglayer/inc/primitive3d/hiddengeometryprimitive3d.hxx

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  19
  20 #pragma once
  21
  22 #include <drawinglayer/primitive3d/groupprimitive3d.hxx>
  23
  24
  25 namespace drawinglayer::primitive3d
  26     {
  27         // This primitive is used to represent geometry for non-visible objects,
  28         // e.g. a 3D cube without fill attributes. To still be able to use
  29         // primitives for HitTest functionality, the 3d decompositions produce
  30         // an as much as possible simplified fill geometry encapsulated in this
  31         // primitive when there is no fill geometry. Currently, the 3d hit test
  32         // uses only areas, so maybe in a further enhanced version this will change
  33         // to 'if neither filled nor lines' creation criteria. The whole primitive
  34         // decomposes to nothing, so no one not knowing it will be influenced. Only
  35         // helper processors for hit test (and maybe BoundRect extractors) will
  36         // use it and its children subcontent.
  37         class HiddenGeometryPrimitive3D final : public GroupPrimitive3D
  38         {
  39         public:
  40             explicit HiddenGeometryPrimitive3D(const Primitive3DContainer& rChildren);
  41
  42             // despite returning an empty decomposition since it's no visualisation data,
  43             // range calculation is intended to use hidden geometry, so
  44             // the local implementation will return the children's range
  45             virtual basegfx::B3DRange getB3DRange(const geometry::ViewInformation3D& rViewInformation) const override;
  46
  47             /// The default implementation returns an empty sequence
  48             virtual Primitive3DContainer get3DDecomposition(const geometry::ViewInformation3D& rViewInformation) const override;
  49
  50             // provide unique ID
  51             DeclPrimitive3DIDBlock()
  52         };
  53
  54 } // end of namespace drawinglayer::primitive3d
  55
  56
  57 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */