[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [48999] trunk/blender/source/blender/ blenkernel/intern/particle_system.c: fix for particle system using uninitialized stack memory with midpoint of rk4 integrators .

[Campbell Barton]

Revision: 48999
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=48999
Author:   campbellbarton
Date:     2012-07-17 13:28:30 +0000 (Tue, 17 Jul 2012)
Log Message:
-----------
fix for particle system using uninitialized stack memory with midpoint of rk4 integrators.

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

Modified: trunk/blender/source/blender/blenkernel/intern/particle_system.c
===================================================================
--- trunk/blender/source/blender/blenkernel/intern/particle_system.c	2012-07-17 12:05:15 UTC (rev 48998)
+++ trunk/blender/source/blender/blenkernel/intern/particle_system.c	2012-07-17 13:28:30 UTC (rev 48999)
@@ -2159,7 +2159,9 @@
 			break;
 	}
 
-	copy_particle_key(states, &pa->state, 1);
+	for (i=0; i<steps; i++) {
+		copy_particle_key(states + i, &pa->state, 1);
+	}
 
 	states->time = 0.f;
 
@@ -2739,7 +2741,12 @@
 		return;
 	}
 
-	extrotfac = len_v3(pa->state.ave);
+	if (part->flag & PART_ROT_DYN) {
+		extrotfac = len_v3(pa->state.ave);
+	}
+	else {
+		extrotfac = 0.0f;
+	}
 
 	if ((part->flag & PART_ROT_DYN) && ELEM3(part->avemode, PART_AVE_VELOCITY, PART_AVE_HORIZONTAL, PART_AVE_VERTICAL)) {
 		float angle;