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#!BPY
"""
Name: 'Vertex Groups Island Average'
Blender: 243
Group: 'WeightPaint'
Tooltip: 'Average the vertex weights for each connected set of verts'
"""
# --------------------------------------------------------------------------
# ***** BEGIN GPL LICENSE BLOCK *****
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software Foundation,
# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
# --------------------------------------------------------------------------
import Blender
from Blender import Scene, Mesh, Window, sys, Draw
from BPyMesh import meshWeight2List, list2MeshWeight, mesh2linkedFaces
import BPyMessages
import bpy
def faceGroups2VertSets(face_groups):
''' Return the face groups as sets of vert indicies '''
return [set([v.index for f in fg for v in f]) for fg in face_groups]
def vgroup_average(ob_orig, me, sce, PREF_ALL_VGROUPS=True):
if not me.getVertGroupNames():
return
weight_names, weight_list = meshWeight2List(me)
weight_names_len = len(weight_names)
vgroup_dummy = [0.0] * weight_names_len
vgroup_range = range(weight_names_len)
if not PREF_ALL_VGROUPS:
weight_active_index = weight_names.index(me.activeGroup)
for vert_set in faceGroups2VertSets( mesh2linkedFaces(me) ):
if not vert_set:
continue
if PREF_ALL_VGROUPS:
# We need to average the vgroups
collected_group = vgroup_dummy[:]
for i in vert_set:
vert_group = weight_list[i] # get the original weight
weight_list[i] = collected_group # replace with the collected group
for j in vgroup_range: # iter through the vgroups
collected_group[j] += vert_group[j]
for j in vgroup_range:
collected_group[j] /= len(vert_set)
else:
# Active group only
vert_weight = 0.0
for i in vert_set:
vert_weight += weight_list[i][weight_active_index]
vert_weight /= len(vert_set)
for i in vert_set:
weight_list[i][weight_active_index] = vert_weight
list2MeshWeight(me, weight_names, weight_list)
def main():
# Gets the current scene, there can be many scenes in 1 blend file.
sce = bpy.data.scenes.active
# Get the active object, there can only ever be 1
# and the active object is always the editmode object.
ob_act = sce.objects.active
if not ob_act or ob_act.type != 'Mesh':
BPyMessages.Error_NoMeshActive()
return
# Saves the editmode state and go's out of
# editmode if its enabled, we cant make
# changes to the mesh data while in editmode.
is_editmode = Window.EditMode()
Window.EditMode(0)
PREF_ALL_VGROUPS = Draw.PupMenu("All Groups?%t|All Groups%x1|Active Group Only%x0")
if PREF_ALL_VGROUPS==-1:
return
Window.WaitCursor(1)
me = ob_act.getData(mesh=1) # old NMesh api is default
t = sys.time()
# Run the mesh editing function
vgroup_average(ob_act, me, sce, PREF_ALL_VGROUPS)
# Timing the script is a good way to be aware on any speed hits when scripting
print 'Average VGroups in %.2f seconds' % (sys.time()-t)
Window.WaitCursor(0)
if is_editmode: Window.EditMode(1)
# This lets you can import the script without running it
if __name__ == '__main__':
main()
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