forked from bartvdbraak/blender
70 lines
2.5 KiB
Python
70 lines
2.5 KiB
Python
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# <pep8 compliant>
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def mesh_linked_faces(me):
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'''
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Splits the mesh into connected parts,
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these parts are returned as lists of faces.
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used for seperating cubes from other mesh elements in the 1 mesh
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'''
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# Build vert face connectivity
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vert_faces = [[] for i in range(len(mesh.vertices))]
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for f in mesh.faces:
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for v in f.vertices:
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vert_faces[v].append(f)
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# sort faces into connectivity groups
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face_groups = [[f] for f in mesh.faces]
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face_mapping = list(range(len(mesh.faces))) # map old, new face location
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# Now clump faces iterativly
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ok = True
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while ok:
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ok = False
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for i, f in enumerate(mesh.faces):
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mapped_index = face_mapping[f.index]
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mapped_group = face_groups[mapped_index]
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for v in f.vertices:
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for nxt_f in vert_faces[v]:
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if nxt_f != f:
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nxt_mapped_index = face_mapping[nxt_f.index]
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# We are not a part of the same group
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if mapped_index != nxt_mapped_index:
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ok = True
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# Assign mapping to this group so they all map to this group
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for grp_f in face_groups[nxt_mapped_index]:
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face_mapping[grp_f.index] = mapped_index
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# Move faces into this group
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mapped_group.extend(face_groups[nxt_mapped_index])
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# remove reference to the list
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face_groups[nxt_mapped_index] = None
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# return all face groups that are not null
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# this is all the faces that are connected in their own lists.
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return [fg for fg in face_groups if fg]
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