bmesh py api, new functions:

* bmesh.utils.face_vert_rip(f, v)
* bmesh.utils.loop_rip(l)

source/blender/bmesh/intern/bmesh_core.c

@@ -1930,7 +1930,7 @@ static int bm_edge_cut(BMesh *bm, BMEdge *e, BMLoop *cutl)
  *
  * \return The newly created BMVert
  */
-static BMVert *bm_urmv_loop(BMesh *bm, BMLoop *sl)
+BMVert *bmesh_urmv_loop(BMesh *bm, BMLoop *sl)
 {
 	BMVert **vtar;
 	int len, i;
@@ -2007,20 +2007,6 @@ static BMVert *bm_urmv_loop(BMesh *bm, BMLoop *sl)
  */
 BMVert *bmesh_urmv(BMesh *bm, BMFace *sf, BMVert *sv)
 {
-	BMLoop *l_first;
-	BMLoop *l_iter;
-
-	l_iter = l_first = BM_FACE_FIRST_LOOP(sf);
-	do {
-		if (l_iter->v == sv) {
-			break;
-		}
-	} while ((l_iter = l_iter->next) != l_first);
-
-	if (l_iter->v != sv) {
-		/* sv is not part of sf */
-		return NULL;
-	}
-
-	return bm_urmv_loop(bm, l_iter);
+	BMLoop *l = BM_face_vert_share_loop(sf, sv);
+	return bmesh_urmv_loop(bm, l);
 }

source/blender/bmesh/intern/bmesh_core.h

@@ -60,5 +60,6 @@ BMVert *bmesh_semv(BMesh *bm, BMVert *tv, BMEdge *e, BMEdge **r_e);
 BMEdge *bmesh_jekv(BMesh *bm, BMEdge *ke, BMVert *kv, const short check_edge_splice);
 BMFace *bmesh_jfke(BMesh *bm, BMFace *f1, BMFace *f2, BMEdge *e);
 BMVert *bmesh_urmv(BMesh *bm, BMFace *sf, BMVert *sv);
+BMVert *bmesh_urmv_loop(BMesh *bm, BMLoop *sl);
 
 #endif /* __BMESH_CORE_H__ */

source/blender/bmesh/intern/bmesh_mods.c

@@ -1073,7 +1073,17 @@ BMEdge *BM_edge_rotate(BMesh *bm, BMEdge *e, const short ccw, const short check_
 /**
  * \brief Rip a single face from a vertex fan
  */
-BMVert *BM_vert_rip(BMesh *bm, BMFace *sf, BMVert *sv)
+BMVert *BM_face_vert_rip(BMesh *bm, BMFace *sf, BMVert *sv)
 {
 	return bmesh_urmv(bm, sf, sv);
 }
+
+/**
+ * \brief Rip a single face from a vertex fan
+ *
+ * \note same as #BM_face_vert_rip but faster (avoids a loop lookup)
+ */
+BMVert *BM_face_loop_rip(BMesh *bm, BMLoop *sl)
+{
+	return bmesh_urmv_loop(bm, sl);
+}

source/blender/bmesh/intern/bmesh_mods.h

@@ -77,6 +77,7 @@ enum {
 };
 
 
-BMVert *BM_vert_rip(BMesh *bm, BMFace *sf, BMVert *sv);
+BMVert *BM_face_vert_rip(BMesh *bm, BMFace *sf, BMVert *sv);
+BMVert *BM_face_loop_rip(BMesh *bm, BMLoop *sl);
 
 #endif /* __BMESH_MODS_H__ */

source/blender/bmesh/intern/bmesh_queries.c

@@ -556,6 +556,29 @@ BMVert *BM_edge_share_vert(BMEdge *e1, BMEdge *e2)
 	}
 }
 
+/**
+ * \brief Radial Find a Vertex Loop in Face
+ *
+ * Finds the loop used which uses \a v in face loop \a l
+ *
+ * \note currenly this just uses simple loop in future may be speeded up
+ * using radial vars
+ */
+BMLoop *BM_face_vert_share_loop(BMFace *f, BMVert *v)
+{
+	BMLoop *l_first;
+	BMLoop *l_iter;
+
+	l_iter = l_first = BM_FACE_FIRST_LOOP(f);
+	do {
+		if (l_iter->v == v) {
+			return l_iter;
+		}
+	} while ((l_iter = l_iter->next) != l_first);
+
+	return NULL;
+}
+
 /**
  * Returns the verts of an edge as used in a face
  * if used in a face at all, otherwise just assign as used in the edge.

source/blender/bmesh/intern/bmesh_queries.h

@@ -72,6 +72,7 @@ int     BM_edge_share_face_count(BMEdge *e1, BMEdge *e2);
 int     BM_edge_share_vert_count(BMEdge *e1, BMEdge *e2);
 
 BMVert *BM_edge_share_vert(BMEdge *e1, BMEdge *e2);
+BMLoop *BM_face_vert_share_loop(BMFace *f, BMVert *v);
 
 void    BM_edge_ordered_verts(BMEdge *edge, BMVert **r_v1, BMVert **r_v2);
 

source/blender/bmesh/intern/bmesh_structure.c

@@ -450,27 +450,6 @@ BMLoop *bmesh_radial_faceloop_find_next(BMLoop *l, BMVert *v)
 	return l;
 }
 
-/* NOTE: this function has not been used or tested - so take care but it should work ok,
- * I wrote it for some tool that ended up not using it, however this seems like a reasonable
- * thing to be able to find the loop between a vertex and a face so keeping - campbell */
-/**
- * \brief Radial Find a Vertex Loop in Face
- *
- * Finds the loop used which uses \a v in face loop \a l
- */
-BMLoop *bmesh_radial_faceloop_find_vert(BMFace *f, BMVert *v) /* name is a bit awkward */
-{
-	BMLoop *l_iter, *l_first;
-	if (v->e && (l_iter = l_first = v->e->l)) {
-		do {
-			if (l_iter->v == v && l_iter->f == f) {
-				return l_iter;
-			}
-		} while ((l_iter = l_iter->radial_next) != l_first);
-	}
-	return NULL;
-}
-
 int bmesh_radial_length(BMLoop *l)
 {
 	BMLoop *l_iter = l;

source/blender/editors/mesh/bmesh_tools.c

@@ -2409,7 +2409,7 @@ static int mesh_rip_invoke(bContext *C, wmOperator *op, wmEvent *event)
 		/* rip two adjacent edges */
 		if (BM_edge_face_count(e2) == 1 || BM_vert_face_count(v) == 2) {
 			l = e2->l;
-			ripvert = BM_vert_rip(bm, l->f, v);
+			ripvert = BM_face_vert_rip(bm, l->f, v);
 
 			BLI_assert(ripvert);
 			if (!ripvert) {

source/blender/python/bmesh/bmesh_py_types.c

@@ -961,7 +961,7 @@ static PyObject *bpy_bmedge_other_vert(BPy_BMEdge *self, BPy_BMVert *value)
 	BPY_BM_CHECK_OBJ(value);
 
 	if (self->bm != value->bm) {
-		PyErr_SetString(PyExc_TypeError,
+		PyErr_SetString(PyExc_ValueError,
 		                "BMEdge.other_vert(vert): vert is from another mesh");
 		return NULL;
 	}
@@ -2625,7 +2625,7 @@ void *BPy_BMElem_PySeq_As_Array(BMesh **r_bm, PyObject *seq, Py_ssize_t min, Py_
 			/* trick so we can ensure all items have the same mesh,
 			 * and allows us to pass the 'bm' as NULL. */
 			else if (do_bm_check && (bm  && bm != item->bm)) {
-				PyErr_Format(PyExc_TypeError,
+				PyErr_Format(PyExc_ValueError,
 				             "%s: %d %s is from another mesh",
 				             error_prefix, i, type->tp_name);
 				goto err_cleanup;

source/blender/python/bmesh/bmesh_py_utils.c

@@ -417,6 +417,68 @@ static PyObject *bpy_bm_utils_face_join(PyObject *UNUSED(self), PyObject *value)
 }
 
 
+PyDoc_STRVAR(bpy_bm_utils_face_vert_rip_doc,
+".. method:: face_vert_rip(face, vert)\n"
+"\n"
+"   Rip a vertex in a face away and add a new vertex.\n"
+"\n"
+"   :arg face: The face to rip.\n"
+"   :type face: :class:`BMFace`\n"
+"   :arg vert: A vertex in the face to rip.\n"
+"   :type vert: :class:`BMVert`\n"
+"   :return vert: The newly created vertex or None of failure.\n"
+"   :rtype vert: :class:`BMVert`\n"
+"\n"
+"   .. note::\n"
+"\n"
+"      This is the same as loop_rip, and has only been added for convenience.\n"
+);
+static PyObject *bpy_bm_utils_face_vert_rip(PyObject *UNUSED(self), PyObject *args)
+{
+	BPy_BMFace *py_face;
+	BPy_BMVert *py_vert;
+
+	BMesh *bm;
+	BMLoop *l;
+	BMVert *v_new;
+
+	if (!PyArg_ParseTuple(args, "O!O!:face_vert_rip",
+	                      &BPy_BMFace_Type, &py_face,
+	                      &BPy_BMVert_Type, &py_vert))
+	{
+		return NULL;
+	}
+
+	BPY_BM_CHECK_OBJ(py_face);
+	BPY_BM_CHECK_OBJ(py_vert);
+
+	bm = py_face->bm;
+
+	if (bm != py_vert->bm) {
+		PyErr_SetString(PyExc_ValueError,
+		                "mesh elements are from different meshes");
+		return NULL;
+	}
+
+	l = BM_face_vert_share_loop(py_face->f, py_vert->v);
+
+	if (l == NULL) {
+		PyErr_SetString(PyExc_ValueError,
+		                "vertex not found in face");
+		return NULL;
+	}
+
+	v_new = BM_face_loop_rip(bm, l);
+
+	if (v_new != l->v) {
+		return BPy_BMVert_CreatePyObject(bm, v_new);
+	}
+	else {
+		Py_RETURN_NONE;
+	}
+}
+
+
 PyDoc_STRVAR(bpy_bm_utils_face_flip_doc,
 ".. method:: face_flip(faces)\n"
 "\n"
@@ -442,6 +504,44 @@ static PyObject *bpy_bm_utils_face_flip(PyObject *UNUSED(self), BPy_BMFace *valu
 }
 
 
+
+PyDoc_STRVAR(bpy_bm_utils_loop_rip_doc,
+".. method:: loop_rip(loop)\n"
+"\n"
+"   Rip a vertex in a face away and add a new vertex.\n"
+"\n"
+"   :arg loop: The to rip.\n"
+"   :type loop: :class:`BMFace`\n"
+"   :return vert: The newly created vertex or None of failure.\n"
+"   :rtype vert: :class:`BMVert`\n"
+);
+static PyObject *bpy_bm_utils_loop_rip(PyObject *UNUSED(self), BPy_BMLoop *value)
+{
+	BMesh *bm;
+	BMVert *v_new;
+
+	if (!BPy_BMLoop_Check(value)) {
+		PyErr_Format(PyExc_TypeError,
+		             "loop_rip(loop): BMLoop expected, not '%.200s'",
+		             Py_TYPE(value)->tp_name);
+		return NULL;
+	}
+
+	BPY_BM_CHECK_OBJ(value);
+
+	bm = value->bm;
+
+	v_new = BM_face_loop_rip(bm, value->l);
+
+	if (v_new != value->l->v) {
+		return BPy_BMVert_CreatePyObject(bm, v_new);
+	}
+	else {
+		Py_RETURN_NONE;
+	}
+}
+
+
 static struct PyMethodDef BPy_BM_utils_methods[] = {
     {"vert_collapse_edge",  (PyCFunction)bpy_bm_utils_vert_collapse_edge,  METH_VARARGS, bpy_bm_utils_vert_collapse_edge_doc},
     {"vert_collapse_faces", (PyCFunction)bpy_bm_utils_vert_collapse_faces, METH_VARARGS, bpy_bm_utils_vert_collapse_faces_doc},
@@ -450,7 +550,9 @@ static struct PyMethodDef BPy_BM_utils_methods[] = {
     {"edge_rotate",         (PyCFunction)bpy_bm_utils_edge_rotate,         METH_VARARGS, bpy_bm_utils_edge_rotate_doc},
     {"face_split",          (PyCFunction)bpy_bm_utils_face_split,          METH_VARARGS, bpy_bm_utils_face_split_doc},
     {"face_join",           (PyCFunction)bpy_bm_utils_face_join,           METH_O,       bpy_bm_utils_face_join_doc},
+    {"face_vert_rip",       (PyCFunction)bpy_bm_utils_face_vert_rip,       METH_VARARGS, bpy_bm_utils_face_vert_rip_doc},
     {"face_flip",           (PyCFunction)bpy_bm_utils_face_flip,           METH_O,       bpy_bm_utils_face_flip_doc},
+    {"loop_rip",            (PyCFunction)bpy_bm_utils_loop_rip,            METH_O,       bpy_bm_utils_loop_rip_doc},
     {NULL, NULL, 0, NULL}
 };