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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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8
src/SelectMgr/SelectMgr_ViewerSelector.cxx
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@@ -361,8 +361,8 @@ void SelectMgr_ViewerSelector::traverseObject (const Handle(SelectMgr_Selectable
{
if (!aSensitivesTree->IsOuter (aNode))
{
const Standard_Integer aLeftChildIdx = aSensitivesTree->LeftChild (aNode);
const Standard_Integer aRightChildIdx = aSensitivesTree->RightChild (aNode);
const Standard_Integer aLeftChildIdx = aSensitivesTree->Child<0> (aNode);
const Standard_Integer aRightChildIdx = aSensitivesTree->Child<1> (aNode);
const Standard_Boolean isLeftChildIn = aMgr.Overlaps (aSensitivesTree->MinPoint (aLeftChildIdx),
aSensitivesTree->MaxPoint (aLeftChildIdx));
const Standard_Boolean isRightChildIn = aMgr.Overlaps (aSensitivesTree->MinPoint (aRightChildIdx),
@@ -467,8 +467,8 @@ void SelectMgr_ViewerSelector::TraverseSensitives()
{
if (!aBVHTree->IsOuter (aNode))
{
const Standard_Integer aLeftChildIdx = aBVHTree->LeftChild (aNode);
const Standard_Integer aRightChildIdx = aBVHTree->RightChild (aNode);
const Standard_Integer aLeftChildIdx = aBVHTree->Child<0> (aNode);
const Standard_Integer aRightChildIdx = aBVHTree->Child<1> (aNode);
const Standard_Boolean isLeftChildIn =
mySelectingVolumeMgr.Overlaps (aBVHTree->MinPoint (aLeftChildIdx),
aBVHTree->MaxPoint (aLeftChildIdx));