hiddengeometryprimitive3d.hxx

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#pragma once
 
#include <drawinglayer/primitive3d/groupprimitive3d.hxx>
 
 
namespace drawinglayer::primitive3d
    {
        // This primitive is used to represent geometry for non-visible objects,
        // e.g. a 3D cube without fill attributes. To still be able to use
        // primitives for HitTest functionality, the 3d decompositions produce
        // an as much as possible simplified fill geometry encapsulated in this
        // primitive when there is no fill geometry. Currently, the 3d hit test
        // uses only areas, so maybe in a further enhanced version this will change
        // to 'if neither filled nor lines' creation criteria. The whole primitive
        // decomposes to nothing, so no one not knowing it will be influenced. Only
        // helper processors for hit test (and maybe BoundRect extractors) will
        // use it and its children subcontent.
        class HiddenGeometryPrimitive3D final : public GroupPrimitive3D
        {
        public:
            explicit HiddenGeometryPrimitive3D(const Primitive3DContainer& rChildren);
 
            // despite returning an empty decomposition since it's no visualisation data,
            // range calculation is intended to use hidden geometry, so
            // the local implementation will return the children's range
            virtual basegfx::B3DRange getB3DRange(const geometry::ViewInformation3D& rViewInformation) const override;
 
            virtual Primitive3DContainer get3DDecomposition(const geometry::ViewInformation3D& rViewInformation) const override;
 
            // provide unique ID
            DeclPrimitive3DIDBlock()
        };
 
} // end of namespace drawinglayer::primitive3d
 
 
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