forked from bartvdbraak/blender
Fix a crasher in WeightVG modifiers.
Problem was, if no vertices were ever added to one of the obect's vgroups, there is no CD_DEFORMVERT layer, even though there might be several valid vgroup indices... Odd no one noticed that earlier. Many thanks to miikah for finding that bug!
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@ -204,6 +204,17 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *der
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return dm;
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dvert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MDEFORMVERT, numVerts);
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/* If no vertices were ever added to an object's vgroup, dvert might be NULL. */
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if(!dvert)
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/* If this modifier is not allowed to add vertices, just return. */
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if(!do_add)
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return dm;
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/* Else, add a valid data layer! */
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dvert = CustomData_add_layer_named(&dm->vertData, CD_MDEFORMVERT, CD_CALLOC,
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NULL, numVerts, wmd->defgrp_name);
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/* Ultimate security check. */
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if(!dvert)
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return dm;
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/* Get org weights, assuming 0.0 for vertices not in given vgroup. */
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org_w = MEM_mallocN(sizeof(float) * numVerts, "WeightVGEdit Modifier, org_w");
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@ -251,6 +251,17 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *der
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}
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dvert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MDEFORMVERT, numVerts);
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/* If no vertices were ever added to an object's vgroup, dvert might be NULL. */
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if(!dvert)
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/* If not affecting all vertices, just return. */
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if(wmd->mix_set != MOD_WVG_SET_ALL)
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return dm;
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/* Else, add a valid data layer! */
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dvert = CustomData_add_layer_named(&dm->vertData, CD_MDEFORMVERT, CD_CALLOC,
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NULL, numVerts, wmd->defgrp_name_a);
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/* Ultimate security check. */
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if(!dvert)
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return dm;
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/* Find out which vertices to work on. */
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tidx = MEM_mallocN(sizeof(int) * numVerts, "WeightVGMix Modifier, tidx");
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@ -378,6 +378,10 @@ static DerivedMesh *applyModifier(ModifierData *md, Object *ob, DerivedMesh *der
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return dm;
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dvert = CustomData_duplicate_referenced_layer(&dm->vertData, CD_MDEFORMVERT, numVerts);
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/* If no vertices were ever added to an object's vgroup, dvert might be NULL.
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* As this modifier never add vertices to vgroup, just return. */
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if(!dvert)
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return dm;
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/* Find out which vertices to work on (all vertices in vgroup), and get their relevant weight.
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*/
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