BMesh: add bmesh_disk_vert_replace

1 files changed, 9 insertions, 3 deletions

diff --git a/source/blender/bmesh/intern/bmesh_structure.c b/source/blender/bmesh/intern/bmesh_structure.c
index 30ab693beb7..5bc36cefad2 100644
--- a/source/blender/bmesh/intern/bmesh_structure.c
+++ b/source/blender/bmesh/intern/bmesh_structure.c
@@ -74,10 +74,15 @@ void bmesh_edge_vert_swap(BMEdge *e, BMVert *v_dst, BMVert *v_src)
 	}
 
 	/* swap out edges */
+	bmesh_disk_vert_replace(e, v_dst, v_src);
+}
+
+void bmesh_disk_vert_replace(BMEdge *e, BMVert *v_dst, BMVert *v_src)
+{
 	BLI_assert(e->v1 == v_src || e->v2 == v_src);
-	bmesh_disk_edge_remove(e, v_src);
-	bmesh_disk_vert_swap(e, v_dst, v_src);
-	bmesh_disk_edge_append(e, v_dst);
+	bmesh_disk_edge_remove(e, v_src);		/* remove e from tv's disk cycle */
+	bmesh_disk_vert_swap(e, v_dst, v_src);	/* swap out tv for v_new in e */
+	bmesh_disk_edge_append(e, v_dst);		/* add e to v_dst's disk cycle */
 	BLI_assert(e->v1 != e->v2);
 }
 
@@ -114,6 +119,7 @@ void bmesh_edge_vert_swap(BMEdge *e, BMVert *v_dst, BMVert *v_src)
  * the disk cycle has no problems dealing with non-manifold conditions involving faces.
  *
  * Functions relating to this cycle:
+ * - #bmesh_disk_vert_replace
  * - #bmesh_disk_edge_append
  * - #bmesh_disk_edge_remove
  * - #bmesh_disk_edge_next