[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [49199] trunk/blender/source/blender/ modifiers/intern/MOD_particlesystem.c: Fix #31339, Modifying mesh destroys particle system.

[Lukas Toenne]

Revision: 49199
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=49199
Author:   lukastoenne
Date:     2012-07-25 11:26:10 +0000 (Wed, 25 Jul 2012)
Log Message:
-----------
Fix #31339, Modifying mesh destroys particle system.

The particle system modifier has to ensure tesselation before testing for topology changes. It compares the number of vertices, edges and tesselation faces to the previously stored values.

Note that this test only detects a subset of actual topology changes (where the number of elements differs), but this is a known limitation we have to live with for now.

Modified Paths:
--------------
    trunk/blender/source/blender/modifiers/intern/MOD_particlesystem.c

Modified: trunk/blender/source/blender/modifiers/intern/MOD_particlesystem.c
===================================================================
--- trunk/blender/source/blender/modifiers/intern/MOD_particlesystem.c	2012-07-25 11:25:10 UTC (rev 49198)
+++ trunk/blender/source/blender/modifiers/intern/MOD_particlesystem.c	2012-07-25 11:26:10 UTC (rev 49199)
@@ -176,6 +176,7 @@
 	psmd->dm->needsFree = 0;
 
 	/* report change in mesh structure */
+	DM_ensure_tessface(psmd->dm);
 	if (psmd->dm->getNumVerts(psmd->dm) != psmd->totdmvert ||
 	    psmd->dm->getNumEdges(psmd->dm) != psmd->totdmedge ||
 	    psmd->dm->getNumTessFaces(psmd->dm) != psmd->totdmface)