add BM_edge_is_contiguous(), check for python api.

3 files changed, 26 insertions, 3 deletions

diff --git a/source/blender/bmesh/intern/bmesh_queries.c b/source/blender/bmesh/intern/bmesh_queries.c
index 60ebb99ce05..2284e183d97 100644
--- a/source/blender/bmesh/intern/bmesh_queries.c
+++ b/source/blender/bmesh/intern/bmesh_queries.c
@@ -763,6 +763,19 @@ int BM_edge_is_manifold(BMEdge *e)
 #endif
 
 /**
+ * Tests that the edge is manifold and
+ * that both its faces point the same way.
+ */
+bool BM_edge_is_contiguous(BMEdge *e)
+{
+	const BMLoop *l = e->l;
+	const BMLoop *l_other = l->radial_next;
+	return (l && (l_other != l) &&               /* not 0 or 1 face users */
+	             (l_other->radial_next == l) &&  /* 2 face users */
+	             (l_other->v != l->v));
+}
+
+/**
  * Tests whether or not an edge is on the boundary
  * of a shell (has one face associated with it)
  */
diff --git a/source/blender/bmesh/intern/bmesh_queries.h b/source/blender/bmesh/intern/bmesh_queries.h
index b285c531bb5..7cb5749a4bf 100644
--- a/source/blender/bmesh/intern/bmesh_queries.h
+++ b/source/blender/bmesh/intern/bmesh_queries.h
@@ -61,6 +61,7 @@ bool    BM_edge_is_wire(BMEdge *e);
 bool    BM_vert_is_manifold(BMVert *v);
 bool    BM_edge_is_manifold(BMEdge *e);
 bool    BM_edge_is_boundary(BMEdge *e);
+bool    BM_edge_is_contiguous(BMEdge *e);
 
 bool    BM_loop_is_convex(BMLoop *l);
 
diff --git a/source/blender/python/bmesh/bmesh_py_types.c b/source/blender/python/bmesh/bmesh_py_types.c
index 202d1964bd6..a573c4ae75f 100644
--- a/source/blender/python/bmesh/bmesh_py_types.c
+++ b/source/blender/python/bmesh/bmesh_py_types.c
@@ -412,6 +412,14 @@ static PyObject *bpy_bmedge_is_manifold_get(BPy_BMEdge *self)
 	return PyBool_FromLong(BM_edge_is_manifold(self->e));
 }
 
+PyDoc_STRVAR(bpy_bmedge_is_contiguous_doc,
+"True when this edge is manifold, between two faces with the same winding (read-only).\n\n:type: boolean"
+);
+static PyObject *bpy_bmedge_is_contiguous_get(BPy_BMEdge *self)
+{
+	BPY_BM_CHECK_OBJ(self);
+	return PyBool_FromLong(BM_edge_is_contiguous(self->e));
+}
 
 PyDoc_STRVAR(bpy_bmedge_is_wire_doc,
 "True when this edge is not connected to any faces (read-only).\n\n:type: boolean"
@@ -678,10 +686,11 @@ static PyGetSetDef bpy_bmedge_getseters[] = {
 	{(char *)"link_loops", (getter)bpy_bmelemseq_elem_get, (setter)NULL, (char *)bpy_bmedge_link_loops_doc, (void *)BM_LOOPS_OF_EDGE},
 
 	/* readonly checks */
-	{(char *)"is_manifold",  (getter)bpy_bmedge_is_manifold_get,  (setter)NULL, (char *)bpy_bmedge_is_manifold_doc, NULL},
-	{(char *)"is_wire",      (getter)bpy_bmedge_is_wire_get,      (setter)NULL, (char *)bpy_bmedge_is_wire_doc, NULL},
+	{(char *)"is_manifold",   (getter)bpy_bmedge_is_manifold_get,   (setter)NULL, (char *)bpy_bmedge_is_manifold_doc, NULL},
+	{(char *)"is_contiguous", (getter)bpy_bmedge_is_contiguous_get, (setter)NULL, (char *)bpy_bmedge_is_contiguous_doc, NULL},
+	{(char *)"is_wire",       (getter)bpy_bmedge_is_wire_get,       (setter)NULL, (char *)bpy_bmedge_is_wire_doc, NULL},
 	{(char *)"is_boundary",   (getter)bpy_bmedge_is_boundary_get,   (setter)NULL, (char *)bpy_bmedge_is_boundary_doc, NULL},
-	{(char *)"is_valid",     (getter)bpy_bm_is_valid_get,         (setter)NULL, (char *)bpy_bm_is_valid_doc, NULL},
+	{(char *)"is_valid",      (getter)bpy_bm_is_valid_get,          (setter)NULL, (char *)bpy_bm_is_valid_doc, NULL},
 
 	{NULL, NULL, NULL, NULL, NULL} /* Sentinel */
 };