86 lines
2.1 KiB
Plaintext
86 lines
2.1 KiB
Plaintext
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#ifndef OSGUTIL_CULLVIEWSTATE
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#define OSGUTIL_CULLVIEWSTATE 1
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#include <osg/BoundingSphere>
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#include <osg/BoundingBox>
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#include <osg/Matrix>
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#include <osg/ClippingVolume>
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#include <osgUtil/Export>
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namespace osgUtil {
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/** Container class for encapsulating the viewing state in local
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coordinates, during the cull traversal.
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*/
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class OSGUTIL_EXPORT CullViewState : public osg::Referenced
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{
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public:
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CullViewState();
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osg::ref_ptr<osg::Matrix> _matrix;
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osg::ref_ptr<osg::Matrix> _inverse;
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osg::Vec3 _eyePoint;
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osg::Vec3 _centerPoint;
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osg::Vec3 _lookVector;
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osg::Vec3 _upVector;
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unsigned int _bbCornerFar;
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unsigned int _bbCornerNear;
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float _ratio2;
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osg::ClippingVolume _clippingVolume;
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enum
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{
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NO_CULLING = 0x00,
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FRUSTUM_LEFT_CULLING = 0x01,
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FRUSTUM_RIGHT_CULLING = 0x02,
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FRUSTUM_BOTTOM_CULLING = 0x04,
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FRUSTUM_TOP_CULLING = 0x08,
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FRUSTUM_NEAR_CULLING = 0x10,
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FRUSTUM_FAR_CULLING = 0x20,
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VIEW_FRUSTUM_CULLING = 0x3F,
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SMALL_FEATURE_CULLING = 0x40,
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ENALBE_ALL_CULLING = 0x7F
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};
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typedef unsigned int CullingMode;
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inline bool isCulled(const osg::BoundingSphere& sp,CullingMode& mode) const
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{
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if (!sp.isValid()) return true;
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if (!_clippingVolume.contains(sp,mode)) return true;
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if (mode&SMALL_FEATURE_CULLING)
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{
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osg::Vec3 delta(sp._center-_eyePoint);
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if (sp.radius2()<delta.length2()*_ratio2)
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{
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return true;
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}
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}
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return false;
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}
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inline bool isCulled(const osg::BoundingBox& bb,CullingMode mode) const
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{
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if (!bb.isValid()) return true;
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return !_clippingVolume.contains(bb,mode);
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}
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protected:
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~CullViewState();
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};
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};
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#endif
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