Commit: 11fe6cec3b3d94605809cb6b70a14a6b20ea0052
Author: Bastien Montagne
Date: Sun Sep 22 18:29:05 2019 +0200
Branches: temp-lanpr-cleanup
https://developer.blender.org/rB11fe6cec3b3d94605809cb6b70a14a6b20ea0052
Fix T70150: Explode modifier crashes with empty vertex group.
There’s be a lot to say about that explode modifier code, for now just
follow other places in code... But the handling of 'invalid'/'unkown'
particle case is... quiet confusing to say the least.
===================================================================
M source/blender/modifiers/intern/MOD_explode.c
===================================================================
diff --git a/source/blender/modifiers/intern/MOD_explode.c
b/source/blender/modifiers/intern/MOD_explode.c
index ed42a4bf8b1..5ba61ea818b 100644
--- a/source/blender/modifiers/intern/MOD_explode.c
+++ b/source/blender/modifiers/intern/MOD_explode.c
@@ -1069,7 +1069,7 @@ static Mesh *explodeMesh(ExplodeModifierData *emd,
/* override uv channel for particle age */
if (mtface) {
- float age = (cfra - pa->time) / pa->lifetime;
+ float age = (facepa[i] != totpart) ? (cfra - pa->time) / pa->lifetime :
0.0f;
/* Clamp to this range to avoid flipping to the other side of the
coordinates. */
CLAMP(age, 0.001f, 0.999f);
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