/usr/include/osg/ShadowVolumeOccluder is in libopenscenegraph-dev 3.2.1-6.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_SHADOWVOLUMEOCCLUDER
#define OSG_SHADOWVOLUMEOCCLUDER 1
#include <osg/Polytope>
#include <osg/ConvexPlanarOccluder>
#include <osg/Node>
namespace osg {
class CullStack;
/** ShadowVolumeOccluder is a helper class for implementing shadow occlusion culling. */
class OSG_EXPORT ShadowVolumeOccluder
{
public:
typedef std::vector<Polytope> HoleList;
ShadowVolumeOccluder(const ShadowVolumeOccluder& svo):
_volume(svo._volume),
_nodePath(svo._nodePath),
_projectionMatrix(svo._projectionMatrix),
_occluderVolume(svo._occluderVolume),
_holeList(svo._holeList) {}
ShadowVolumeOccluder():
_volume(0.0f) {}
bool operator < (const ShadowVolumeOccluder& svo) const { return getVolume()>svo.getVolume(); } // not greater volume first.
/** compute the shadow volume occluder. */
bool computeOccluder(const NodePath& nodePath,const ConvexPlanarOccluder& occluder,CullStack& cullStack,bool createDrawables=false);
inline void disableResultMasks();
inline void pushCurrentMask();
inline void popCurrentMask();
/** return true if the matrix passed in matches the projection matrix that this ShadowVolumeOccluder is
* associated with.*/
bool matchProjectionMatrix(const osg::Matrix& matrix) const
{
if (_projectionMatrix.valid()) return matrix==*_projectionMatrix;
else return false;
}
/** Set the NodePath which describes which node in the scene graph
* that this occluder is attached to. */
inline void setNodePath(NodePath& nodePath) { _nodePath = nodePath; }
inline NodePath& getNodePath() { return _nodePath; }
inline const NodePath& getNodePath() const { return _nodePath; }
/** get the volume of the occluder minus its holes, in eye coords, the volume is normalized by dividing by
* the volume of the view frustum in eye coords.*/
float getVolume() const { return _volume; }
/** return the occluder polytope.*/
Polytope& getOccluder() { return _occluderVolume; }
/** return the const occluder polytope.*/
const Polytope& getOccluder() const { return _occluderVolume; }
/** return the list of holes.*/
HoleList& getHoleList() { return _holeList; }
/** return the const list of holes.*/
const HoleList& getHoleList() const { return _holeList; }
/** return true if the specified vertex list is contained entirely
* within this shadow occluder volume.*/
bool contains(const std::vector<Vec3>& vertices);
/** return true if the specified bounding sphere is contained entirely
* within this shadow occluder volume.*/
bool contains(const BoundingSphere& bound);
/** return true if the specified bounding box is contained entirely
* within this shadow occluder volume.*/
bool contains(const BoundingBox& bound);
inline void transformProvidingInverse(const osg::Matrix& matrix)
{
_occluderVolume.transformProvidingInverse(matrix);
for(HoleList::iterator itr=_holeList.begin();
itr!=_holeList.end();
++itr)
{
itr->transformProvidingInverse(matrix);
}
}
protected:
float _volume;
NodePath _nodePath;
ref_ptr<const RefMatrix> _projectionMatrix;
Polytope _occluderVolume;
HoleList _holeList;
};
/** A list of ShadowVolumeOccluder, used by CollectOccluderVisitor and CullVistor's.*/
typedef std::vector<ShadowVolumeOccluder> ShadowVolumeOccluderList;
inline void ShadowVolumeOccluder::disableResultMasks()
{
//std::cout<<"ShadowVolumeOccluder::disableResultMasks() - _occluderVolume.getMaskStack().size()="<<_occluderVolume.getMaskStack().size()<<" "<<_occluderVolume.getCurrentMask()<<std::endl;
_occluderVolume.setResultMask(0);
for(HoleList::iterator itr=_holeList.begin();
itr!=_holeList.end();
++itr)
{
itr->setResultMask(0);
}
}
inline void ShadowVolumeOccluder::pushCurrentMask()
{
//std::cout<<"ShadowVolumeOccluder::pushCurrentMasks() - _occluderVolume.getMaskStack().size()="<<_occluderVolume.getMaskStack().size()<<" "<<_occluderVolume.getCurrentMask()<<std::endl;
_occluderVolume.pushCurrentMask();
if (!_holeList.empty())
{
for(HoleList::iterator itr=_holeList.begin();
itr!=_holeList.end();
++itr)
{
itr->pushCurrentMask();
}
}
}
inline void ShadowVolumeOccluder::popCurrentMask()
{
_occluderVolume.popCurrentMask();
if (!_holeList.empty())
{
for(HoleList::iterator itr=_holeList.begin();
itr!=_holeList.end();
++itr)
{
itr->popCurrentMask();
}
}
//std::cout<<"ShadowVolumeOccluder::popCurrentMasks() - _occluderVolume.getMaskStack().size()="<<_occluderVolume.getMaskStack().size()<<" "<<_occluderVolume.getCurrentMask()<<std::endl;
}
} // end of namespace
#endif
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