FGFS-4.1/OpenSceneGraph
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Simplified the depth calculation code in CullVisitor so that it always computes

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the depth of all drawables, so that it is always safe for RenderBin sort routines can use
these values directly.

Add an example of a RenderBin::SortCallback to sgv.cpp.
This commit is contained in:
Robert Osfield
2002-09-18 14:57:01 +00:00
parent 4a54b7bdb1
commit f11410928f
6 changed files with 75 additions and 79 deletions
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49
src/Demos/sgv/sgv.cpp
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@@ -15,6 +15,40 @@
#include <osgUtil/Optimizer>
struct SortByAverageDistanceFunctor
{
bool operator() (const osgUtil::RenderGraph* lhs,const osgUtil::RenderGraph* rhs) const
{
return lhs->getAverageDistance()<rhs->getAverageDistance();
}
};
struct SortByMinimumDistanceFunctor
{
bool operator() (const osgUtil::RenderGraph* lhs,const osgUtil::RenderGraph* rhs) const
{
return lhs->getMinimumDistance()<rhs->getMinimumDistance();
}
};
struct MySortCallback : public osgUtil::RenderBin::SortCallback
{
virtual void sort(osgUtil::RenderBin* renderbin)
{
osgUtil::RenderBin::RenderGraphList& renderGraphList = renderbin->_renderGraphList;
for(osgUtil::RenderBin::RenderGraphList::iterator itr=renderGraphList.begin();
itr!=renderGraphList.end();
++itr)
{
(*itr)->sortFrontToBack();
}
// std::sort(renderGraphList.begin(),renderGraphList.end(),SortByAverageDistanceFunctor());
std::sort(renderGraphList.begin(),renderGraphList.end(),SortByMinimumDistanceFunctor());
}
};
void write_usage(std::ostream& out,const std::string& name)
{
out << std::endl;
@@ -96,6 +130,21 @@ int main( int argc, char **argv )
viewer.registerCameraManipulator(new osgGA::TrackballManipulator);
viewer.registerCameraManipulator(new osgGA::FlightManipulator);
viewer.registerCameraManipulator(new osgGA::DriveManipulator);
// osgUtil::RenderBin* depth_renderbin = osgUtil::RenderBin::getRenderBinPrototype("DepthSortedBin");
// if (depth_renderbin)
// {
// depth_renderbin->setSortMode(osgUtil::RenderBin::SORT_BY_STATE);
// }
osgUtil::RenderStage* renderstage = viewer.getViewportSceneView(0)->getRenderStage();
if (renderstage)
{
renderstage->setSortLocalCallback(new MySortCallback);
// renderstage->setSortMode(osgUtil::RenderBin::SORT_FRONT_TO_BACK);
}
// open the viewer window.
viewer.open();