Campbell Barton
35c2498a40
This averages the weights of vert groups per island (based on face connectivity) Nice for making scales and works well with new dual-quat interpolation
104 lines
3.2 KiB
Python
104 lines
3.2 KiB
Python
#!BPY
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"""
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Name: 'Vertex Groups Island Average'
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Blender: 243
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Group: 'Mesh'
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Tooltip: 'Average the vertex weights for each connected set of verts'
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"""
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# --------------------------------------------------------------------------
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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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import Blender
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from Blender import Scene, Mesh, Window, sys
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from BPyMesh import meshWeight2List, list2MeshWeight, mesh2linkedFaces
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import BPyMessages
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import bpy
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def faceGroups2VertSets(face_groups):
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''' Return the face groups as sets of vert indicies '''
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return [set([v.index for f in fg for v in f]) for fg in face_groups]
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def vgroup_average(ob_orig, me, sce):
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weight_names, weight_list = meshWeight2List(me)
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if not weight_names:
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return
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weight_names_len = len(weight_names)
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vgroup_dummy = [0.0] * weight_names_len
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vgroup_range = range(weight_names_len)
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for vert_set in faceGroups2VertSets( mesh2linkedFaces(me) ):
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if not vert_set:
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continue
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collected_group = vgroup_dummy[:]
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# We need to average the vgroups
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for i in vert_set:
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vert_group = weight_list[i] # get the original weight
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weight_list[i] = collected_group # replace with the collected group
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for j in vgroup_range: # iter through the vgroups
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print collected_group, vert_group[j]
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collected_group[j] += vert_group[j]
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for j in vgroup_range:
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collected_group[j] /= len(vert_set)
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list2MeshWeight(me, weight_names, weight_list)
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def main():
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# Gets the current scene, there can be many scenes in 1 blend file.
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sce = bpy.data.scenes.active
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# Get the active object, there can only ever be 1
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# and the active object is always the editmode object.
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ob_act = sce.objects.active
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if not ob_act or ob_act.type != 'Mesh':
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BPyMessages.Error_NoMeshActive()
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return
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# Saves the editmode state and go's out of
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# editmode if its enabled, we cant make
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# changes to the mesh data while in editmode.
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is_editmode = Window.EditMode()
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Window.EditMode(0)
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Window.WaitCursor(1)
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me = ob_act.getData(mesh=1) # old NMesh api is default
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t = sys.time()
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# Run the mesh editing function
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vgroup_average(ob_act, me, sce)
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# Timing the script is a good way to be aware on any speed hits when scripting
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print 'Average VGroups in %.2f seconds' % (sys.time()-t)
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Window.WaitCursor(0)
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if is_editmode: Window.EditMode(1)
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# This lets you can import the script without running it
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if __name__ == '__main__':
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main() |