Speedup for bullet physics mesh conversion

Was adding each face with a remove doubles option that made conversion increasingly slower for larger meshes, this would often hang blender when starting with the BGE with larger meshes.

Replace btTriangleMesh()->addTriangle() with btTriangleIndexVertexArray()

YoFrankie level_1_home.blend starts a third faster, level_nut about twice as fast.

- previous commit was also incorrect using the original meshes vert locations rather then the vert locations that came from the derived mesh.
- Softbody is relying on removing doubles at 0.01 to give stable results, this no longer works but seems a bit dodgy anyway. Maybe some post-processing filter could fix up a mesh for bullet softbody.

1 files changed, 3 insertions, 0 deletions

diff --git a/source/gameengine/Ketsji/KX_ConvertPhysicsObjects.cpp b/source/gameengine/Ketsji/KX_ConvertPhysicsObjects.cpp
index 602486e0017..9b2d7403974 100644
--- a/source/gameengine/Ketsji/KX_ConvertPhysicsObjects.cpp
+++ b/source/gameengine/Ketsji/KX_ConvertPhysicsObjects.cpp
@@ -881,6 +881,9 @@ void	KX_ConvertBulletObject(	class	KX_GameObject* gameobj,
 				{
 					shapeInfo->SetMesh(meshobj, false,false);
 				}
+
+				// Note! since 2.48a bullet mesh conversion has been sped up not to remove doubles
+				// if softbody needs this there should be some post processing filter for softbody meshes.
 				if (objprop->m_softbody)
 					shapeInfo->setVertexWeldingThreshold(0.01f); //todo: expose this to the UI