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Fix T95541: Broken vertex weight with mirror modifier. 

Regression from rB1a7757b0bc69/rBa0acb9bd0cc0. Special handling
(averaging) of weights on merged center vertices also requires to be
'reversed' when new correct merge order is used, compared to previous
behavior.
This commit is contained in:
Bastien Montagne 2022-05-03 10:30:50 +02:00
parent cfdec85cd9
commit 20f819d708
Notes: blender-bot 2023-02-14 08:29:54 +01:00 
Referenced by issue #95541, Regression: Broken vertex weight with mirror modifier
1 changed files with 4 additions and 1 deletions
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5
source/blender/blenkernel/intern/mesh_mirror.c
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@ -455,7 +455,10 @@ Mesh *BKE_mesh_mirror_apply_mirror_on_axis_for_modifier(MirrorModifierData *mmd,
if (flip_map) {
for (i = 0; i < maxVerts; dvert++, i++) {
/* merged vertices get both groups, others get flipped */
if (do_vtargetmap && (vtargetmap[i] != -1)) {
if (use_correct_order_on_merge && do_vtargetmap && (vtargetmap[i + maxVerts] != -1)) {
BKE_defvert_flip_merged(dvert - maxVerts, flip_map, flip_map_len);
}
else if (!use_correct_order_on_merge && do_vtargetmap && (vtargetmap[i] != -1)) {
BKE_defvert_flip_merged(dvert, flip_map, flip_map_len);
}
else {