[Bf-blender-cvs] [0935d32] fracture_modifier: fix, force autohide facepair generation only from valid DM

[Martin Felke]

Commit: 0935d32ffb19ae902db1321216fd9a014e5b58bd
Author: Martin Felke
Date:   Fri May 27 20:28:33 2016 +0200
Branches: fracture_modifier
https://developer.blender.org/rB0935d32ffb19ae902db1321216fd9a014e5b58bd

fix, force autohide facepair generation only from valid DM

if primary source is invalid, force fallback to secondary source earlier now

===================================================================

M	source/blender/modifiers/intern/MOD_fracture.c

===================================================================

diff --git a/source/blender/modifiers/intern/MOD_fracture.c b/source/blender/modifiers/intern/MOD_fracture.c
index 467dd30..bf03c39 100644
--- a/source/blender/modifiers/intern/MOD_fracture.c
+++ b/source/blender/modifiers/intern/MOD_fracture.c
@@ -3488,7 +3488,8 @@ static void do_refresh_autohide(FractureModifierData *fmd, Object *ob)
 
 	fmd->face_pairs = BLI_ghash_int_new("face_pairs");
 
-	if (fmd->dm)
+	/* in case of re-using existing islands this one might become invalid for autohide, so force fallback */
+	if (fmd->dm && fmd->dm->getNumPolys(fmd->dm) > 0)
 	{
 		make_face_pairs(fmd, fmd->dm, ob);
 	}