[Bf-blender-cvs] [ade6646] master: Fix T39180: Particle with fluid physics unstable.

[Lukas Tönne]

Commit: ade6646755224ce9178d280738727c1a968b28b6
Author: Lukas Tönne
Date:   Fri Mar 14 11:03:04 2014 +0100
https://developer.blender.org/rBade6646755224ce9178d280738727c1a968b28b6

Fix T39180: Particle with fluid physics unstable.

Fluid particles use the particle system's bvhtree structure, which is a
runtime BVH tree. This was not reset properly on copying objects/psys,
which lead to concurrent access in threaded depsgraph updates and memory
corruption.

===================================================================

M	source/blender/blenkernel/intern/object.c

===================================================================

diff --git a/source/blender/blenkernel/intern/object.c b/source/blender/blenkernel/intern/object.c
index 43dbc34..dbc8e4d 100644
--- a/source/blender/blenkernel/intern/object.c
+++ b/source/blender/blenkernel/intern/object.c
@@ -1282,6 +1282,7 @@ static ParticleSystem *copy_particlesystem(ParticleSystem *psys)
 	psysn->pdd = NULL;
 	psysn->effectors = NULL;
 	psysn->tree = NULL;
+	psysn->bvhtree = NULL;
 	
 	BLI_listbase_clear(&psysn->pathcachebufs);
 	BLI_listbase_clear(&psysn->childcachebufs);