[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [54469] trunk/blender/source/blender/ blenkernel/intern/dynamicpaint.c: check for divide by zero for dynamic paint modifier.

[Campbell Barton]

Revision: 54469
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=54469
Author:   campbellbarton
Date:     2013-02-11 15:43:09 +0000 (Mon, 11 Feb 2013)
Log Message:
-----------
check for divide by zero for dynamic paint modifier.

Modified Paths:
--------------
    trunk/blender/source/blender/blenkernel/intern/dynamicpaint.c

Modified: trunk/blender/source/blender/blenkernel/intern/dynamicpaint.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/dynamicpaint.c	2013-02-11 15:35:38 UTC (rev 54468)
+++ trunk/blender/source/blender/blenkernel/intern/dynamicpaint.c	2013-02-11 15:43:09 UTC (rev 54469)
@@ -2379,7 +2379,8 @@
 						dot11 = d2[0] * d2[0] + d2[1] * d2[1];
 						dot12 = d2[0] * d3[0] + d2[1] * d3[1];
 
-						invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
+						invDenom = (dot00 * dot11 - dot01 * dot01);
+						invDenom = invDenom ? 1.0f / invDenom : 1.0f;
 						u = (dot11 * dot02 - dot01 * dot12) * invDenom;
 						v = (dot00 * dot12 - dot01 * dot02) * invDenom;
 
@@ -2399,7 +2400,8 @@
 							dot11 = d2[0] * d2[0] + d2[1] * d2[1];
 							dot12 = d2[0] * d3[0] + d2[1] * d3[1];
 
-							invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
+							invDenom = (dot00 * dot11 - dot01 * dot01);
+							invDenom = invDenom ? 1.0f / invDenom : 1.0f;
 							u = (dot11 * dot02 - dot01 * dot12) * invDenom;
 							v = (dot00 * dot12 - dot01 * dot02) * invDenom;