Cleanup: remove automerge BMesh operator

Move logic into EDBM_automerge since this is meant to run after
transform and isn't a generic editing operation.

source/blender/bmesh/intern/bmesh_opdefines.c

@@ -368,28 +368,6 @@ static BMOpDefine bmo_remove_doubles_def = {
    BMO_OPTYPE_FLAG_SELECT_VALIDATE),
 };
 
-/*
- * Auto Merge.
- *
- * Finds groups of vertices closer then **dist** and merges them together,
- * using the weld verts bmop.  The merges must go from a vert not in
- * **verts** to one in **verts**.
- */
-static BMOpDefine bmo_automerge_def = {
-  "automerge",
-  /* slots_in */
-  {{"verts", BMO_OP_SLOT_ELEMENT_BUF, {BM_VERT}}, /* input verts */
-   {"dist",         BMO_OP_SLOT_FLT}, /* maximum distance */
-   {{'\0'}},
-  },
-  {{{'\0'}}},  /* no output */
-  bmo_automerge_exec,
-  (BMO_OPTYPE_FLAG_UNTAN_MULTIRES |
-   BMO_OPTYPE_FLAG_NORMALS_CALC |
-   BMO_OPTYPE_FLAG_SELECT_FLUSH |
-   BMO_OPTYPE_FLAG_SELECT_VALIDATE),
-};
-
 /*
  * Collapse Connected.
  *
@@ -2073,7 +2051,6 @@ static BMOpDefine bmo_symmetrize_def = {
 /* clang-format on */
 
 const BMOpDefine *bmo_opdefines[] = {
-    &bmo_automerge_def,
     &bmo_average_vert_facedata_def,
     &bmo_beautify_fill_def,
     &bmo_bevel_def,

source/blender/bmesh/intern/bmesh_operators_private.h

@@ -24,7 +24,6 @@
 struct BMOperator;
 struct BMesh;
 
-void bmo_automerge_exec(BMesh *bm, BMOperator *op);
 void bmo_average_vert_facedata_exec(BMesh *bm, BMOperator *op);
 void bmo_beautify_fill_exec(BMesh *bm, BMOperator *op);
 void bmo_bevel_exec(BMesh *bm, BMOperator *op);

source/blender/bmesh/operators/bmo_removedoubles.c

@@ -706,34 +706,3 @@ void bmo_find_doubles_exec(BMesh *bm, BMOperator *op)
   slot_targetmap_out = BMO_slot_get(op->slots_out, "targetmap.out");
   bmesh_find_doubles_common(bm, op, op, slot_targetmap_out);
 }
-
-void bmo_automerge_exec(BMesh *bm, BMOperator *op)
-{
-  BMOperator findop, weldop;
-  BMIter viter;
-  BMVert *v;
-
-  /* The "verts" input sent to this op is the set of verts that
-   * can be merged away into any other verts. Mark all other verts
-   * as VERT_KEEP. */
-  BMO_slot_buffer_flag_enable(bm, op->slots_in, "verts", BM_VERT, VERT_IN);
-  BM_ITER_MESH (v, &viter, bm, BM_VERTS_OF_MESH) {
-    if (!BMO_vert_flag_test(bm, v, VERT_IN)) {
-      BMO_vert_flag_enable(bm, v, VERT_KEEP);
-    }
-  }
-
-  /* Search for doubles among all vertices, but only merge non-VERT_KEEP
-   * vertices into VERT_KEEP vertices. */
-  BMO_op_initf(bm, &findop, op->flag, "find_doubles verts=%av keep_verts=%fv", VERT_KEEP);
-  BMO_slot_copy(op, slots_in, "dist", &findop, slots_in, "dist");
-  BMO_op_exec(bm, &findop);
-
-  /* weld the vertices */
-  BMO_op_init(bm, &weldop, op->flag, "weld_verts");
-  BMO_slot_copy(&findop, slots_out, "targetmap.out", &weldop, slots_in, "targetmap");
-  BMO_op_exec(bm, &weldop);
-
-  BMO_op_finish(bm, &findop);
-  BMO_op_finish(bm, &weldop);
-}

source/blender/editors/mesh/editmesh_automerge.c

@@ -56,16 +56,32 @@
 
 void EDBM_automerge(Scene *scene, Object *obedit, bool update, const char hflag)
 {
-  bool ok;
   BMEditMesh *em = BKE_editmesh_from_object(obedit);
+  BMesh *bm = em->bm;
+  int totvert_prev = bm->totvert;
 
-  ok = BMO_op_callf(em->bm,
-                    BMO_FLAG_DEFAULTS,
-                    "automerge verts=%hv dist=%f",
-                    hflag,
-                    scene->toolsettings->doublimit);
+  BMOperator findop, weldop;
 
-  if (LIKELY(ok) && update) {
+  /* Search for doubles among all vertices, but only merge non-VERT_KEEP
+   * vertices into VERT_KEEP vertices. */
+  BMO_op_initf(bm,
+               &findop,
+               BMO_FLAG_DEFAULTS,
+               "find_doubles verts=%av keep_verts=%Hv dist=%f",
+               hflag,
+               scene->toolsettings->doublimit);
+
+  BMO_op_exec(bm, &findop);
+
+  /* weld the vertices */
+  BMO_op_init(bm, &weldop, BMO_FLAG_DEFAULTS, "weld_verts");
+  BMO_slot_copy(&findop, slots_out, "targetmap.out", &weldop, slots_in, "targetmap");
+  BMO_op_exec(bm, &weldop);
+
+  BMO_op_finish(bm, &findop);
+  BMO_op_finish(bm, &weldop);
+
+  if ((totvert_prev != bm->totvert) && update) {
     EDBM_update_generic(em, true, true);
   }
 }