FGFS-4.1/OpenSceneGraph
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Added _maximumNumberOfActiveOccluders variable to CollectOccludersVisitor(), to

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limit the maximum number of occluders used in the cull traversal, default is
now 10.

Added set/getCollectOccluderVisitor() method into SceneView to allow control
of the the settings of the CollectOccluderVisitor.
This commit is contained in:
Robert Osfield
2003-12-11 16:46:45 +00:00
parent 8f41f8a149
commit 5295d68fd3
4 changed files with 48 additions and 15 deletions
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29
src/osgUtil/SceneView.cpp
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@@ -449,35 +449,38 @@ void SceneView::cullStage(const osg::Matrixd& projection,const osg::Matrixd& mod
{
//std::cout << "Scene graph contains occluder nodes, searching for them"<<std::endl;
osg::CollectOccludersVisitor cov;
cov.setFrameStamp(_frameStamp.get());
if (!_collectOccludersVisistor) _collectOccludersVisistor = new osg::CollectOccludersVisitor;
_collectOccludersVisistor->reset();
_collectOccludersVisistor->setFrameStamp(_frameStamp.get());
// use the frame number for the traversal number.
if (_frameStamp.valid())
{
cov.setTraversalNumber(_frameStamp->getFrameNumber());
_collectOccludersVisistor->setTraversalNumber(_frameStamp->getFrameNumber());
}
cov.pushViewport(_viewport.get());
cov.pushProjectionMatrix(proj.get());
cov.pushModelViewMatrix(mv.get());
_collectOccludersVisistor->pushViewport(_viewport.get());
_collectOccludersVisistor->pushProjectionMatrix(proj.get());
_collectOccludersVisistor->pushModelViewMatrix(mv.get());
// traverse the scene graph to search for occluder in there new positions.
_sceneData->accept(cov);
_sceneData->accept(*_collectOccludersVisistor);
cov.popModelViewMatrix();
cov.popProjectionMatrix();
cov.popViewport();
_collectOccludersVisistor->popModelViewMatrix();
_collectOccludersVisistor->popProjectionMatrix();
_collectOccludersVisistor->popViewport();
// sort the occluder from largest occluder volume to smallest.
cov.removeOccludedOccluders();
_collectOccludersVisistor->removeOccludedOccluders();
//std::cout << "finished searching for occluder - found "<<cov.getCollectedOccluderSet().size()<<std::endl;
osg::notify(osg::INFO) << "finished searching for occluder - found "<<_collectOccludersVisistor->getCollectedOccluderSet().size()<<std::endl;
cullVisitor->getOccluderList().clear();
std::copy(cov.getCollectedOccluderSet().begin(),cov.getCollectedOccluderSet().end(), std::back_insert_iterator<CullStack::OccluderList>(cullVisitor->getOccluderList()));
std::copy(_collectOccludersVisistor->getCollectedOccluderSet().begin(),_collectOccludersVisistor->getCollectedOccluderSet().end(), std::back_insert_iterator<CullStack::OccluderList>(cullVisitor->getOccluderList()));
}