FGFS-4.1/OpenSceneGraph
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Refactored the way that hole are pruned from the occluder hole list.

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git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@14282 16af8721-9629-0410-8352-f15c8da7e697
This commit is contained in:
Robert Osfield 2014-06-25 15:47:59 +00:00
parent 1674692840
commit a2db511c99
1 changed files with 17 additions and 12 deletions
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25
src/osg/CollectOccludersVisitor.cpp
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@ -225,21 +225,26 @@ void CollectOccludersVisitor::removeOccludedOccluders()
break;
}
// now check all the holes in the occludee against the occluder,
// do so in reverse order so that the iterators remain valid.
for(ShadowVolumeOccluder::HoleList::reverse_iterator holeItr=holeList.rbegin();
holeItr!=holeList.rend();
)
// now check all the holes in the occludee against the occluder, and remove the ones that won't be valid
unsigned int previous_valid_hole_i = 0;
for(unsigned int i=0; i<holeList.size(); ++i)
{
if (occluder->contains((*holeItr).getReferenceVertexList()))
if (!occluder->contains(holeList[i].getReferenceVertexList()))
{
holeList.erase((++holeItr).base());
}
else
if (previous_valid_hole_i<i)
{
++holeItr;
// copy valid holes into gaps left by invalid ones
holeList[previous_valid_hole_i] = holeList[i];
}
previous_valid_hole_i++;
}
}
// remove the tail of the holeList if holes have been removed.
if (previous_valid_hole_i<holeList.size())
{
holeList.erase(holeList.begin()+previous_valid_hole_i,holeList.end());
}
}