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0027590: Visualization, Ray Tracing - port to quad BVH trees (QBVH)

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In frames of this issue binary BVH tree produced by building algorithms was collapsed into 4-ary BVH (QBVH).
The BVH traversal code in GLSL was modified to process such trees correctly.
This allows to implore thread coherence, decrease BVH memory consumption (~2 times), and use traversal stack of the half size.
As a result, ray tracing scalability is improved, as well as rendering performance. For various setups, speedup is 12-18%.
This commit is contained in:
dbp
2016-06-20 19:43:44 +03:00
committed by bugmaster
parent 9cc4e7e2db
commit f2474958ef
19 changed files with 936 additions and 540 deletions
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2
src/Select3D/Select3D_SensitiveSet.cxx
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@@ -49,7 +49,7 @@ void Select3D_SensitiveSet::BVH()
Standard_Boolean Select3D_SensitiveSet::Matches (SelectBasics_SelectingVolumeManager& theMgr,
SelectBasics_PickResult& thePickResult)
{
const NCollection_Handle<BVH_Tree<Standard_Real, 3> >& aBVH = myContent->GetBVH();
const BVH_Tree<Standard_Real, 3, BVH_BinaryTree>* aBVH = myContent->GetBVH().get();
thePickResult = SelectBasics_PickResult (RealLast(), RealLast());