Rip-fill mesh tool (option for rip operator)

Alt+V will fill the area inbetween the ripped faces - a bit like extrude.
faces are flipped to match existing geometry and customdata (uv, vcols etc) is copied from surrounding geometry too.

2 files changed, 39 insertions, 0 deletions

diff --git a/source/blender/bmesh/intern/bmesh_queries.c b/source/blender/bmesh/intern/bmesh_queries.c
index 4f09a17b6ce..6bf4e3db1d3 100644
--- a/source/blender/bmesh/intern/bmesh_queries.c
+++ b/source/blender/bmesh/intern/bmesh_queries.c
@@ -324,6 +324,44 @@ BMVert *BM_edge_other_vert(BMEdge *e, BMVert *v)
 }
 
 /**
+ * Given a edge and a loop (assumes the edge is manifold). returns
+ * the other faces loop, sharing the same vertex.
+ *
+ * <pre>
+ * +-------------------+
+ * |                   |
+ * |                   |
+ * |l_other <-- return |
+ * +-------------------+ <-- A manifold edge between 2 faces
+ * |l    e  <-- edge   |
+ * |^ <-------- loop   |
+ * |                   |
+ * +-------------------+
+ * </pre>
+ */
+BMLoop *BM_edge_other_loop(BMEdge *e, BMLoop *l)
+{
+	BMLoop *l_other;
+
+	BLI_assert(BM_edge_is_manifold(e));
+	BLI_assert(BM_vert_in_edge(e, l->v));
+
+	l_other = (e->l == l) ? l->radial_next : l;
+
+	if (l_other->v == l->v) {
+		/* pass */
+	}
+	else if (l_other->next->v == l->v) {
+		l_other = l_other->next;
+	}
+	else {
+		BLI_assert(0);
+	}
+
+	return l_other;
+}
+
+/**
  * The function takes a vertex at the center of a fan and returns the opposite edge in the fan.
  * All edges in the fan must be manifold, otherwise return NULL.
  *
diff --git a/source/blender/bmesh/intern/bmesh_queries.h b/source/blender/bmesh/intern/bmesh_queries.h
index 6cffc1138b0..84a5ffacec7 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -40,6 +40,7 @@ float   BM_edge_calc_length(BMEdge *e);
 int     BM_edge_face_pair(BMEdge *e, BMFace **r_fa, BMFace **r_fb);
 int     BM_edge_loop_pair(BMEdge *e, BMLoop **r_la, BMLoop **r_lb);
 BMVert *BM_edge_other_vert(BMEdge *e, BMVert *v);
+BMLoop *BM_edge_other_loop(BMEdge *e, BMLoop *l);
 BMLoop *BM_face_other_edge_loop(BMFace *f, BMEdge *e, BMVert *v);
 BMLoop *BM_face_other_vert_loop(BMFace *f, BMVert *v_prev, BMVert *v);
 BMLoop *BM_loop_other_vert_loop(BMLoop *l, BMVert *v);