OpenCascade/occt
1
0
Fork 0
mirror of https://git.dev.opencascade.org/repos/occt.git synced 2025-08-09 13:22:24 +03:00
Code Activity

0025703: Visualization - Decrease number of samplers used in ray-tracing mode

Browse Source 
This patch eliminates 3 samplers used in ray-tracing mode:

//! Texture buffer of data records of bottom-level BVH nodes.
Handle(OpenGl_TextureBufferArb) myObjectNodeInfoTexture;
//! Texture buffer of minimum points of bottom-level BVH nodes.
Handle(OpenGl_TextureBufferArb) myObjectMinPointTexture;
//! Texture buffer of maximum points of bottom-level BVH nodes.
Handle(OpenGl_TextureBufferArb) myObjectMaxPointTexture;

Serialized data contained in corresponding texture buffers were added to global scene buffers:

//! Texture buffer of data records of high-level BVH nodes.
Handle(OpenGl_TextureBufferArb) mySceneNodeInfoTexture;
 //! Texture buffer of minimum points of high-level BVH nodes.
Handle(OpenGl_TextureBufferArb) mySceneMinPointTexture;
//! Texture buffer of maximum points of high-level BVH nodes.
Handle(OpenGl_TextureBufferArb) mySceneMaxPointTexture;

This modifications leads also to small performance improvement (~2%) due to higher texture cache efficiency. Some modifications in traversal function (GLSL code) also improve performance (~3%).
This commit is contained in:
dbp
2015-01-14 11:04:27 +03:00
committed by bugmaster
parent 71595c2970
commit e2da917a1c
4 changed files with 120 additions and 194 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
src/OpenGl/OpenGl_SceneGeometry.cxx
View File

@@ -305,7 +305,7 @@ Standard_Boolean OpenGl_RaytraceGeometry::ProcessAcceleration()
Standard_Integer aVerticesOffset = 0;
Standard_Integer aElementsOffset = 0;
Standard_Integer aBVHNodesOffset = 0;
Standard_Integer aBVHNodesOffset = BVH()->Length();
for (Standard_Integer aNodeIdx = 0; aNodeIdx < aBVH->Length(); ++aNodeIdx)
{