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#!BPY
"""
Name: 'Invert Active Group'
Blender: 245
Group: 'WeightPaint'
Tooltip: 'Invert the active vertex group'
"""
# --------------------------------------------------------------------------
# ***** 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
import BPyMessages
import bpy
def vgroup_invert(ob_orig, me):
if not me.getVertGroupNames():
return
group_act = me.activeGroup
if group_act == None:
return
group_data = me.getVertsFromGroup(group_act, 1)
weights= [1.0] * len(me.verts) # 1.0 - initialize inverted
group_data = me.getVertsFromGroup(group_act, 1) # (i,w) tuples.
me.removeVertGroup(group_act) # messes up the active group.
for i,w in group_data:
weights[i] = 1.0-w
me.addVertGroup(group_act)
rep = Blender.Mesh.AssignModes.REPLACE
vertList= [None]
for i,weight in enumerate(weights):
vertList[0] = i
me.assignVertsToGroup(group_act, vertList, weight, rep)
me.activeGroup = group_act
me.update()
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)
Window.WaitCursor(1)
me = ob_act.getData(mesh=1) # old NMesh api is default
t = sys.time()
# Run the mesh editing function
vgroup_invert(ob_act, me)
# Timing the script is a good way to be aware on any speed hits when scripting
print 'Invert VGroup 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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