Commit: e8d9b7c95428f2d3efea344adda93098721dab6c
Author: Philipp Oeser
Date:   Wed May 9 15:08:13 2018 +0200
Branches: blender2.8
https://developer.blender.org/rBe8d9b7c95428f2d3efea344adda93098721dab6c

Merge branch 'master' into blender2.8

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



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

diff --cc source/blender/blenkernel/intern/lattice.c
index 30c839bf766,edca0257d20..b9b894db9a5
--- a/source/blender/blenkernel/intern/lattice.c
+++ b/source/blender/blenkernel/intern/lattice.c
@@@ -861,37 -868,31 +862,31 @@@ void lattice_deform_verts(Object *laOb
  
        lattice_deform_data = init_latt_deform(laOb, target);
  
-       /* check whether to use vertex groups (only possible if target is a 
Mesh)
-        * we want either a Mesh with no derived data, or derived data with
-        * deformverts
+       /* Check whether to use vertex groups (only possible if target is a 
Mesh or Lattice).
+        * We want either a Mesh/Lattice with no derived data, or derived data 
with deformverts.
         */
-       if (target && target->type == OB_MESH) {
-               /* if there's derived data without deformverts, don't use 
vgroups */
-               if (mesh) {
-                       use_vgroups = (mesh->dvert != NULL);
-               }
-               else {
-                       Mesh *me = target->data;
-                       use_vgroups = (me->dvert != NULL);
+       if (vgroup && vgroup[0] && target && ELEM(target->type, OB_MESH, 
OB_LATTICE)) {
+               defgrp_index = defgroup_name_index(target, vgroup);
+ 
+               if (defgrp_index != -1) {
+                       /* if there's derived data without deformverts, don't 
use vgroups */
 -                      if (dm) {
 -                              dvert = dm->getVertDataArray(dm, 
CD_MDEFORMVERT);
++                      if (mesh) {
++                              dvert = CustomData_get_layer(&mesh->vdata, 
CD_MDEFORMVERT);
+                       }
+                       else if (target->type == OB_LATTICE) {
+                               dvert = ((Lattice *)target->data)->dvert;
+                       }
+                       else {
+                               dvert = ((Mesh *)target->data)->dvert;
+                       }
                }
        }
-       else {
-               use_vgroups = false;
-       }
-       
-       if (vgroup && vgroup[0] && use_vgroups) {
-               Mesh *me = target->data;
-               const int defgrp_index = defgroup_name_index(target, vgroup);
-               float weight;
- 
-               if (defgrp_index >= 0 && (me->dvert || mesh)) {
-                       MDeformVert *dvert = mesh ? mesh->dvert : me->dvert;
-                       
-                       for (a = 0; a < numVerts; a++, dvert++) {
-                               weight = defvert_find_weight(dvert, 
defgrp_index);
- 
-                               if (weight > 0.0f)
-                                       calc_latt_deform(lattice_deform_data, 
vertexCos[a], weight * fac);
+       if (dvert) {
+               MDeformVert *dvert_iter;
+               for (a = 0, dvert_iter = dvert; a < numVerts; a++, 
dvert_iter++) {
+                       const float weight = defvert_find_weight(dvert_iter, 
defgrp_index);
+                       if (weight > 0.0f) {
+                               calc_latt_deform(lattice_deform_data, 
vertexCos[a], weight * fac);
                        }
                }
        }

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