FGFS-4.1/OpenSceneGraph
4
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Added computation of occluders volume scaled relative to the frustum volume,

Browse Source 
all volumes computed in eye coords.
This commit is contained in:
Robert Osfield
2002-06-15 12:14:42 +00:00
parent 25b420ac0e
commit 52c36dde70
10 changed files with 110 additions and 54 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
src/osg/ShadowVolumeOccluder.cpp
View File

@@ -139,20 +139,20 @@ Plane computeFrontPlane(const PointList& front)
}
// compute the volume of tetrahedron
inline float computeVolume(const osg::Vec3& a,const osg::Vec3& b,const osg::Vec3& c,const osg::Vec3& d)
{
return fabs(((b-c)^(a-b))*(d-b));
}
// compute the volume of prism.
inline float computeVolume(const osg::Vec3& f1,const osg::Vec3& f2,const osg::Vec3& f3,
const osg::Vec3& b1,const osg::Vec3& b2,const osg::Vec3& b3)
{
return computeVolume(f1,f2,f3,b1)+
computeVolume(b1,b2,b3,f2)+
computeVolume(b1,b3,f2,f3);
}
// // compute the volume of tetrahedron
// inline float computeVolume(const osg::Vec3& a,const osg::Vec3& b,const osg::Vec3& c,const osg::Vec3& d)
// {
// return fabs(((b-c)^(a-b))*(d-b));
// }
//
// // compute the volume of prism.
// inline float computeVolume(const osg::Vec3& f1,const osg::Vec3& f2,const osg::Vec3& f3,
// const osg::Vec3& b1,const osg::Vec3& b2,const osg::Vec3& b3)
// {
// return computeVolume(f1,f2,f3,b1)+
// computeVolume(b1,b2,b3,f2)+
// computeVolume(b1,b3,f2,f3);
// }
// compute the volume between the front and back polygons of the occluder/hole.
float computeVolume(const PointList& front, const PointList& back)
@@ -265,8 +265,7 @@ bool ShadowVolumeOccluder::computeOccluder(const NodePath& nodePath,const Convex
Matrix invP;
invP.invert(P);
float volumeview = computeVolumeOfView(invP);
cout << "volumeview "<<volumeview<<endl;
float volumeview = cullStack.getFrustumVolume();
// compute the transformation matrix which takes form local coords into clip space.
@@ -390,7 +389,7 @@ bool ShadowVolumeOccluder::computeOccluder(const NodePath& nodePath,const Convex
}
std::cout << "final volume = "<<_volume<<std::endl;
//std::cout << "final volume = "<<_volume<<std::endl;
return true;
}