Fix #35347: constraints with vertex group targets were not using the vertex group

weights, it assumed all weights were 1. This gave very different results with the
new bevel modifier due to slightly different vertex group interpolation.

1 files changed, 6 insertions, 2 deletions

diff --git a/source/blender/blenkernel/intern/customdata.c b/source/blender/blenkernel/intern/customdata.c
index 879d1895513..75000ec440b 100644
--- a/source/blender/blenkernel/intern/customdata.c
+++ b/source/blender/blenkernel/intern/customdata.c
@@ -239,12 +239,16 @@ static void layerInterp_mdeformvert(void **sources, const float *weights,
 
 		for (j = 0; j < source->totweight; ++j) {
 			MDeformWeight *dw = &source->dw[j];
+			float weight = dw->weight * interp_weight;
+
+			if (weight == 0.0f)
+				continue;
 
 			for (node = dest_dw; node; node = node->next) {
 				MDeformWeight *tmp_dw = (MDeformWeight *)node->link;
 
 				if (tmp_dw->def_nr == dw->def_nr) {
-					tmp_dw->weight += dw->weight * interp_weight;
+					tmp_dw->weight += weight;
 					break;
 				}
 			}
@@ -254,7 +258,7 @@ static void layerInterp_mdeformvert(void **sources, const float *weights,
 				MDeformWeight *tmp_dw = MEM_callocN(sizeof(*tmp_dw),
 				                                    "layerInterp_mdeformvert tmp_dw");
 				tmp_dw->def_nr = dw->def_nr;
-				tmp_dw->weight = dw->weight * interp_weight;
+				tmp_dw->weight = weight;
 				BLI_linklist_prepend(&dest_dw, tmp_dw);
 				totweight++;
 			}