95 lines
2.8 KiB
Python
95 lines
2.8 KiB
Python
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#!BPY
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"""
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Name: 'Invert Active Group'
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Blender: 245
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Group: 'WeightPaint'
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Tooltip: 'Invert the active vertex group'
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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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import BPyMessages
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import bpy
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def vgroup_invert(ob_orig, me):
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if not me.getVertGroupNames():
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return
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group_act = me.activeGroup
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if group_act == None:
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return
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group_data = me.getVertsFromGroup(group_act, 1)
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weights= [1.0] * len(me.verts) # 1.0 - initialize inverted
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group_data = me.getVertsFromGroup(group_act, 1) # (i,w) tuples.
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me.removeVertGroup(group_act) # messes up the active group.
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for i,w in group_data:
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weights[i] = 1.0-w
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me.addVertGroup(group_act)
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rep = Blender.Mesh.AssignModes.REPLACE
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vertList= [None]
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for i,weight in enumerate(weights):
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vertList[0] = i
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me.assignVertsToGroup(group_act, vertList, weight, rep)
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me.activeGroup = group_act
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me.update()
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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_invert(ob_act, me)
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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 'Invert VGroup 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()
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