Commit: 52bae9691b08d24c63e5fa43af644bc5654afb11
Author: Brecht Van Lommel
Date: Fri Feb 7 13:41:19 2014 +0100
https://developer.blender.org/rB52bae9691b08d24c63e5fa43af644bc5654afb11
Fix T38521: skin modifier crash with zero radius vertices.
===================================================================
M source/blender/modifiers/intern/MOD_skin.c
===================================================================
diff --git a/source/blender/modifiers/intern/MOD_skin.c
b/source/blender/modifiers/intern/MOD_skin.c
index b5c0ae8..ca25d78 100644
--- a/source/blender/modifiers/intern/MOD_skin.c
+++ b/source/blender/modifiers/intern/MOD_skin.c
@@ -774,7 +774,11 @@ static int calc_edge_subdivisions(const MVert *mvert,
const MVertSkin *nodes,
avg[0] = half_v2(evs[0]->radius);
avg[1] = half_v2(evs[1]->radius);
- num_subdivisions = (int)((float)edge_len / (avg[0] + avg[1]));
+
+ if (avg[0] + avg[1] == 0.0f)
+ num_subdivisions = 0;
+ else
+ num_subdivisions = (int)((float)edge_len / (avg[0] + avg[1]));
/* If both ends are branch nodes, two intermediate nodes are
* required */
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