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Differential D15778 Diff 55018 release/scripts/modules/bpy_extras/mesh_utils.py

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release/scripts/modules/bpy_extras/mesh_utils.py

# SPDX-License-Identifier: GPL-2.0-or-later # SPDX-License-Identifier: GPL-2.0-or-later
__all__ = ( __all__ = (
"mesh_linked_uv_islands", "mesh_linked_uv_islands",
"mesh_linked_triangles", "mesh_linked_triangles",
"edge_face_count_dict", "edge_face_count_dict",
"edge_face_count", "edge_face_count",
"edge_loops_from_edges", "edge_loops_from_edges",
"ngon_tessellate", "ngon_tessellate",
"triangle_random_points", "triangle_random_points",
) )
def mesh_linked_uv_islands(mesh): def mesh_linked_uv_islands(mesh):
""" """
Splits the mesh into connected polygons, use this for separating cubes from Returns lists of polygon indices connected by UV islands.
other mesh elements within 1 mesh datablock.
:arg mesh: the mesh used to group with. :arg mesh: the mesh used to group with.
:type mesh: :class:`bpy.types.Mesh` :type mesh: :class:`bpy.types.Mesh`
:return: lists of lists containing polygon indices :return: list of lists containing polygon indices
:rtype: list :rtype: list
""" """
if mesh.polygons and not mesh.uv_layers.active.data:
campbellbartonUnsubmitted
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:rtype: list
"""
- if not len(mesh.uv_layers.active.data):
- raise ValueError("UV Layers are not currently available from python in Edit Mode. Use bmesh and bpy_extras.bmesh_utils.bmesh_linked_uv_islands instead.")
+ if mesh.polygons and not mesh.uv_layers.active.data: raise ValueError("UV Layers are not currently available from python in Edit Mode. Use bmesh and bpy_extras.bmesh_utils.bmesh_linked_uv_islands instead.")

Check there are polygons first, otherwise this would happen for empty meshes (which will return an empty list, but shouldn't error).

campbellbarton: Check there are polygons first, otherwise this would happen for empty meshes (which will return…
campbellbartonUnsubmitted
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Should include a short commenting noting the layer data is always empty in edit-mode.

campbellbarton: Should include a short commenting noting the layer data is always empty in edit-mode.
# Currently, when in edit mode, UV Layer data will always be empty
# when accessed though RNA. This may change in the future.
raise ValueError("UV Layers are not currently available from python in Edit Mode. Use bmesh and bpy_extras.bmesh_utils.bmesh_linked_uv_islands instead.")
campbellbartonUnsubmitted
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# when accessed though RNA. This may change in the future.
- raise ValueError("UV Layers are not currently available from python in Edit Mode. Use bmesh and bpy_extras.bmesh_utils.bmesh_linked_uv_islands instead.")
-
+ raise ValueError(
+ "UV Layers are not currently available from python in Edit Mode. "
+ "Use bmesh and bpy_extras.bmesh_utils.bmesh_linked_uv_islands instead."
+ )
uv_loops = [luv.uv[:] for luv in mesh.uv_layers.active.data]
campbellbarton:
uv_loops = [luv.uv[:] for luv in mesh.uv_layers.active.data] uv_loops = [luv.uv[:] for luv in mesh.uv_layers.active.data]
poly_loops = [poly.loop_indices for poly in mesh.polygons] poly_loops = [poly.loop_indices for poly in mesh.polygons]
luv_hash = {} luv_hash = {}
luv_hash_get = luv_hash.get luv_hash_get = luv_hash.get
luv_hash_ls = [None] * len(uv_loops) luv_hash_ls = [None] * len(uv_loops)
for pi, poly_indices in enumerate(poly_loops): for pi, poly_indices in enumerate(poly_loops):
for li in poly_indices: for li in poly_indices:
uv = uv_loops[li] uv = uv_loops[li]
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