Add BM_edge_calc_squared_length() query function

Same as BM_edge_calc_length(), but avoids square root for cases where
only comparison is needed.

2 files changed, 10 insertions, 1 deletions

diff --git a/source/blender/bmesh/intern/bmesh_queries.c b/source/blender/bmesh/intern/bmesh_queries.c
index 5f5c60dde3f..d723e6464df 100644
--- a/source/blender/bmesh/intern/bmesh_queries.c
+++ b/source/blender/bmesh/intern/bmesh_queries.c
@@ -468,7 +468,7 @@ BMEdge *BM_vert_other_disk_edge(BMVert *v, BMEdge *e_first)
 }
 
 /**
- * Returms edge length
+ * Returns edge length
  */
 float BM_edge_calc_length(BMEdge *e)
 {
@@ -476,6 +476,14 @@ float BM_edge_calc_length(BMEdge *e)
 }
 
 /**
+ * Returns edge length squared (for comparisons)
+ */
+float BM_edge_calc_squared_length(BMEdge *e)
+{
+	return len_squared_v3v3(e->v1->co, e->v2->co);
+}
+
+/**
  * Utility function, since enough times we have an edge
  * and want to access 2 connected faces.
  *
diff --git a/source/blender/bmesh/intern/bmesh_queries.h b/source/blender/bmesh/intern/bmesh_queries.h
index 9af792417bf..59c3fae8c5d 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -37,6 +37,7 @@ int     BM_vert_in_edge(BMEdge *e, BMVert *v);
 int     BM_verts_in_edge(BMVert *v1, BMVert *v2, BMEdge *e);
 
 float   BM_edge_calc_length(BMEdge *e);
+float   BM_edge_calc_squared_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);