def get_bl_crop_mesh_faces(verts, faces, verts_crop, faces_crop, mode, epsilon):
"""
Crop given faces by another set of faces by Blender internal function
:param verts: list of Sv vertices
:param faces: list of faces wich should be cropped
:param verts_crop: list of Sv vertices
:param faces_crop: list of faces by which mesh should be cropped
:param mode: 'inner' or 'outer'
:param epsilon: float, for nearness tests
:return: list of Sv vertices, faces, indexes of old faces
"""
faces = [f if is_ccw_polygon([verts[i] for i in f], accuracy=epsilon) else f[::-1] for f in faces]
faces_crop = [f if is_ccw_polygon([verts_crop[i] for i in f], accuracy=epsilon) else f[::-1] for f in faces_crop]
merged_verts, merged_faces, faces_indexes, faces_crop_indexes = join_meshes(verts, faces, verts_crop, faces_crop)
merged_verts = [Vector(co[:2]) for co in merged_verts]
verts_new, _, faces_new, _, _, face_indexes = bl_crop_mesh(merged_verts, [], merged_faces, 3, epsilon)
if mode == 'inner':
faces_out = []
faces_index_out = []
for f, fi in zip(faces_new, face_indexes):
if not fi:
# it means new faces was generated
continue
in_1 = False
in_2 = False
for i in fi:
if i in faces_indexes:
in_1 = True
else:
in_2 = True
if in_1 and in_2:
faces_out.append(f)
faces_index_out.append(min(fi))
break
verts_out, faces_out = del_loose(verts_new, faces_out)
return [v.to_3d()[:] for v in verts_out], faces_out, faces_index_out
else:
faces_out = []
faces_index_out = []
for f, fi in zip(faces_new, face_indexes):
if not fi:
# it means new faces was generated
continue
in_2 = False
for i in fi:
if i in faces_crop_indexes:
in_2 = True
break
if not in_2:
faces_out.append(f)
faces_index_out.append(min(fi))
verts_out, faces_out = del_loose(verts_new, faces_out)
return [v.to_3d()[:] for v in verts_out], faces_out, faces_index_out
def get_bl_merge_mesh(verts, faces, epsilon):
"""
Merge mesh into one with all intersection and overlapping information by Blender internal function
:param verts: list of Sv vertices
:param faces: list of Sv faces
:param epsilon: For nearness tests
:return: list of Sv Vertices, Faces, list of face old index, list of face overlapping
"""
faces = [
f if is_ccw_polygon([verts[i]
for i in f], accuracy=epsilon) else f[::-1]
for f in faces
]
verts = [Vector(co[:2]) for co in verts]
verts_new, _, faces_new, _, _, face_indexes = bl_merge_mesh(
verts, [], faces, 3, epsilon)
return [v.to_3d()[:] for v in verts_new], [f for f, fi in zip(faces_new, face_indexes) if fi], \
[min(fi) for fi in face_indexes if fi], [len(fi) - 1 for fi in face_indexes if fi]