1 files changed, 23 insertions, 17 deletions

diff --git a/source/blender/modifiers/intern/MOD_array.c b/source/blender/modifiers/intern/MOD_array.c
index fa5149a45ba..56db68b163c 100644
--- a/source/blender/modifiers/intern/MOD_array.c
+++ b/source/blender/modifiers/intern/MOD_array.c
@@ -306,14 +306,14 @@ static void mesh_merge_transform(Mesh *result,
     mul_m4_v3(cap_offset, mv->co);
     /* Reset MVert flags for caps */
     mv->flag = mv->bweight = 0;
+  }
 
-    /* We have to correct normals too, if we do not tag them as dirty later! */
-    if (!recalc_normals_later) {
-      float no[3];
-      normal_short_to_float_v3(no, mv->no);
-      mul_mat3_m4_v3(cap_offset, no);
-      normalize_v3(no);
-      normal_float_to_short_v3(mv->no, no);
+  /* We have to correct normals too, if we do not tag them as dirty later! */
+  if (!recalc_normals_later) {
+    float(*dst_vert_normals)[3] = BKE_mesh_vertex_normals_for_write(result);
+    for (i = 0; i < cap_nverts; i++) {
+      mul_mat3_m4_v3(cap_offset, dst_vert_normals[cap_verts_index + i]);
+      normalize_v3(dst_vert_normals[cap_verts_index + i]);
     }
   }
 
@@ -370,7 +370,7 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
                                    Mesh *mesh)
 {
   const MVert *src_mvert;
-  MVert *mv, *mv_prev, *result_dm_verts;
+  MVert *result_dm_verts;
 
   MEdge *me;
   MLoop *ml;
@@ -582,6 +582,14 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
   first_chunk_nverts = chunk_nverts;
 
   unit_m4(current_offset);
+  const float(*src_vert_normals)[3] = NULL;
+  float(*dst_vert_normals)[3] = NULL;
+  if (!use_recalc_normals) {
+    src_vert_normals = BKE_mesh_vertex_normals_ensure(mesh);
+    dst_vert_normals = BKE_mesh_vertex_normals_for_write(result);
+    BKE_mesh_vertex_normals_clear_dirty(result);
+  }
+
   for (c = 1; c < count; c++) {
     /* copy customdata to new geometry */
     CustomData_copy_data(&mesh->vdata, &result->vdata, 0, c * chunk_nverts, chunk_nverts);
@@ -589,23 +597,21 @@ static Mesh *arrayModifier_doArray(ArrayModifierData *amd,
     CustomData_copy_data(&mesh->ldata, &result->ldata, 0, c * chunk_nloops, chunk_nloops);
     CustomData_copy_data(&mesh->pdata, &result->pdata, 0, c * chunk_npolys, chunk_npolys);
 
-    mv_prev = result_dm_verts;
-    mv = mv_prev + c * chunk_nverts;
+    const int vert_offset = c * chunk_nverts;
 
     /* recalculate cumulative offset here */
     mul_m4_m4m4(current_offset, current_offset, offset);
 
     /* apply offset to all new verts */
-    for (i = 0; i < chunk_nverts; i++, mv++, mv_prev++) {
-      mul_m4_v3(current_offset, mv->co);
+    for (i = 0; i < chunk_nverts; i++) {
+      const int i_dst = vert_offset + i;
+      mul_m4_v3(current_offset, result_dm_verts[i_dst].co);
 
       /* We have to correct normals too, if we do not tag them as dirty! */
       if (!use_recalc_normals) {
-        float no[3];
-        normal_short_to_float_v3(no, mv->no);
-        mul_mat3_m4_v3(current_offset, no);
-        normalize_v3(no);
-        normal_float_to_short_v3(mv->no, no);
+        copy_v3_v3(dst_vert_normals[i_dst], src_vert_normals[i]);
+        mul_mat3_m4_v3(current_offset, dst_vert_normals[i_dst]);
+        normalize_v3(dst_vert_normals[i_dst]);
       }
     }