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Further work on Occlusion Culling. Most of work is complete, just debugging

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required now.
This commit is contained in:
Robert Osfield
2002-06-13 16:21:00 +00:00
parent 8dcb26967c
commit 0ebe473eb5
13 changed files with 335 additions and 55 deletions
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20
src/osg/CollectOccludersVisitor.cpp
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@@ -103,18 +103,26 @@ void CollectOccludersVisitor::apply(osg::OccluderNode& node)
if (isCulled(node)) return;
std::cout<<"CollectOccludersVisitor:: We have found an Occlusion node in frustum"<<&node<<std::endl;
// std::cout<<"CollectOccludersVisitor:: We have found an Occlusion node in frustum"<<&node<<std::endl;
// push the culling mode.
pushCurrentMask();
if (node.getOccluder()&& !isCulled(node.getOccluder()->getOccluder().getVertexList()))
if (node.getOccluder())
{
// need to test occluder against view frustum.
std::cout << " adding in Occluder"<<std::endl;
_occluderList.push_back(ShadowVolumeOccluder(_nodePath, *node.getOccluder(), getModelViewMatrix(),getProjectionMatrix()));
// computeOccluder will check if the occluder is the view frustum,
// if it ins't then the it will return false, when in it will
// clip the occluder's polygons in clip space, then create occluder
// planes, all with their normals facing inward towards the volume,
// and then transform them back into projection space.
ShadowVolumeOccluder svo;
if (svo.computeOccluder(_nodePath, *node.getOccluder(), *this))
{
// need to test occluder against view frustum.
// std::cout << " adding in Occluder"<<std::endl;
_occluderList.push_back(svo);
}
}
traverse(node);