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#!BPY
"""
Name: 'Clean Meshes'
Blender: 242
Group: 'Mesh'
Tooltip: 'Clean unused data from all selected mesh objects.'
"""
__author__ = ["Campbell Barton"]
__url__ = ("blender", "elysiun", "http://members.iinet.net.au/~cpbarton/ideasman/")
__version__ = "0.1"
__bpydoc__ = """\
Clean Meshes
Cleans unused data from selected meshes
"""
# ***** BEGIN GPL LICENSE BLOCK *****
#
# Script copyright (C) Campbell J Barton
#
# 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 *****
# --------------------------------------------------------------------------
from Blender import *
from Blender.Mathutils import TriangleArea
import Blender
import BPyMesh
dict2MeshWeight= BPyMesh.dict2MeshWeight
meshWeight2Dict= BPyMesh.meshWeight2Dict
def rem_free_verts(me):
vert_users= [0] * len(me.verts)
for f in me.faces:
for v in f.v:
vert_users[v.index]+=1
for e in me.edges:
for v in e: # loop on edge verts
vert_users[v.index]+=1
verts_free= [i for i, users in enumerate(vert_users) if not users]
if verts_free:
pass
me.verts.delete(verts_free)
return len(verts_free)
def rem_free_edges(me, limit=None):
''' Only remove based on limit if a limit is set, else remove all '''
def sortPair(a,b):
if a>b:
return b,a
else:
return a,b
edgeDict= {} # will use a set when python 2.4 is standard.
for f in me.faces:
fidxs= [v.index for v in f.v]
for i in xrange(len(fidxs)):
edgeDict[sortPair(fidxs[i], fidxs[i-1])]= None
edges_free= []
for e in me.edges:
if not edgeDict.has_key(sortPair(e.v1.index, e.v2.index)):
edges_free.append(e)
if limit != None:
edges_free= [e for e in edges_free if (e.v1.co-e.v2.co).length <= limit]
me.edges.delete(edges_free)
return len(edges_free)
def rem_area_faces(me, limit=0.001):
''' Faces that have an area below the limit '''
rem_faces= [f for f in me.faces if f.area <= limit]
if rem_faces:
me.faces.delete( 0, rem_faces )
return len(rem_faces)
def rem_perimeter_faces(me, limit=0.001):
''' Faces whos combine edge length is below the limit '''
def faceEdLen(f):
v= f.v
if len(v) == 3:
return\
(v[0].co-v[1].co).length +\
(v[1].co-v[2].co).length +\
(v[2].co-v[0].co).length
else: # 4
return\
(v[0].co-v[1].co).length +\
(v[1].co-v[2].co).length +\
(v[2].co-v[3].co).length +\
(v[3].co-v[0].co).length
rem_faces= [f for f in me.faces if faceEdLen(f) <= limit]
if rem_faces:
me.faces.delete( 0, rem_faces )
return len(rem_faces)
def rem_unused_materials(me):
materials= me.materials
len_materials= len(materials)
if len_materials < 2:
return 0
rem_materials= 0
material_users= dict( [(i,0) for i in xrange(len_materials)] )
for f in me.faces:
# Make sure the face index isnt too big. this happens sometimes.
if f.mat >= len_materials:
f.mat=0
material_users[f.mat] += 1
mat_idx_subtract= 0
reindex_mapping= dict( [(i,0) for i in xrange(len_materials)] )
i= len_materials
while i:
i-=1
if material_users[i] == 0:
mat_idx_subtract+=1
reindex_mapping[i]= mat_idx_subtract
materials.pop(i)
rem_materials+=1
for f in me.faces:
f.mat= f.mat - reindex_mapping[f.mat]
me.materials= materials
return rem_materials
def rem_free_groups(me, groupNames, vWeightDict):
''' cound how many vert users a group has and remove unsued groups '''
rem_groups = 0
groupUserDict= dict([(group,0) for group in groupNames])
for vertexWeight in vWeightDict:
for group, weight in vertexWeight.iteritems():
groupUserDict[group] += 1
i=len(groupNames)
while i:
i-=1
group= groupNames[i]
if groupUserDict[group] == 0:
del groupNames[i]
print '\tremoving, vgroup', group
rem_groups+=1
return rem_groups
def rem_zero_weights(me, limit, groupNames, vWeightDict):
''' remove verts from a group when their weight is zero.'''
rem_vweight_count= 0
for vertexWeight in vWeightDict:
items= vertexWeight.items()
for group, weight in items:
if weight < limit:
del vertexWeight[group]
rem_vweight_count+= 1
return rem_vweight_count
def normalize_vweight(me, groupNames, vWeightDict):
for vertexWeight in vWeightDict:
unit= 0.0
for group, weight in vertexWeight.iteritems():
unit+= weight
if unit != 1.0 and unit != 0.0:
for group, weight in vertexWeight.iteritems():
vertexWeight[group]= weight/unit
def main():
scn= Scene.GetCurrent()
obsel= Object.GetSelected()
actob= scn.getActiveObject()
is_editmode= Window.EditMode()
# Edit mode object is not active, add it to the list.
if is_editmode and (not actob.sel):
obsel.append(actob)
#====================================#
# Popup menu to select the functions #
#====================================#
CLEAN_ALL_DATA= Draw.Create(0)
CLEAN_VERTS_FREE= Draw.Create(1)
CLEAN_EDGE_NOFACE= Draw.Create(0)
CLEAN_EDGE_SMALL= Draw.Create(0)
CLEAN_FACE_PERIMETER= Draw.Create(0)
CLEAN_FACE_SMALL= Draw.Create(0)
CLEAN_MATERIALS= Draw.Create(0)
CLEAN_GROUP= Draw.Create(0)
CLEAN_VWEIGHT= Draw.Create(0)
CLEAN_WEIGHT_NORMALIZE= Draw.Create(0)
limit= Draw.Create(0.01)
# Get USER Options
pup_block= [\
('Verts: free', CLEAN_VERTS_FREE, 'Remove verts that are not used by an edge or a face.'),\
('Edges: free', CLEAN_EDGE_NOFACE, 'Remove edges that are not in a face.'),\
('Edges: short', CLEAN_EDGE_SMALL, 'Remove edges that are below the length limit.'),\
('Faces: small perimeter', CLEAN_FACE_PERIMETER, 'Remove faces below the perimeter limit.'),\
('Faces: small area', CLEAN_FACE_SMALL, 'Remove faces below the area limit (may remove faces stopping T-face artifacts).'),\
'Materials',\
('Material Clean', CLEAN_MATERIALS, 'Remove unused materials.'),\
'VGroups',\
('Group Clean', CLEAN_GROUP, 'Remove vertex groups that have no verts using them.'),\
('Weight Clean', CLEAN_VWEIGHT, 'Remove zero weighted verts from groups (limit is zero threshold).'),\
('Weight Normalize', CLEAN_WEIGHT_NORMALIZE, 'Make the sum total of vertex weights accross vgroups 1.0 for each vertex.'),\
'',\
('limit: ', limit, 0.001, 1.0, 'Limit used for the area and length tests above (a higher limit will remove more data).'),\
'',\
('All Mesh Data', CLEAN_ALL_DATA, 'Warning! Operate on ALL mesh objects in your Blend file. Use with care'),\
]
if not Draw.PupBlock('Clean Selected Meshes...', pup_block):
return
CLEAN_VERTS_FREE= CLEAN_VERTS_FREE.val
CLEAN_EDGE_NOFACE= CLEAN_EDGE_NOFACE.val
CLEAN_EDGE_SMALL= CLEAN_EDGE_SMALL.val
CLEAN_FACE_PERIMETER= CLEAN_FACE_PERIMETER.val
CLEAN_FACE_SMALL= CLEAN_FACE_SMALL.val
CLEAN_MATERIALS= CLEAN_MATERIALS.val
CLEAN_GROUP= CLEAN_GROUP.val
CLEAN_VWEIGHT= CLEAN_VWEIGHT.val
CLEAN_WEIGHT_NORMALIZE= CLEAN_WEIGHT_NORMALIZE.val
limit= limit.val
CLEAN_ALL_DATA= CLEAN_ALL_DATA.val
if is_editmode: Window.EditMode(0)
if CLEAN_ALL_DATA:
if CLEAN_GROUP or CLEAN_VWEIGHT or CLEAN_WEIGHT_NORMALIZE:
# For groups we need the objects linked to the mesh
meshes= [ob.getData(mesh=1) for ob in Object.Get() if ob.getType() == 'Mesh']
else:
meshes= Mesh.Get()
else:
meshes= [ob.getData(mesh=1) for ob in obsel if ob.getType() == 'Mesh']
rem_face_count= rem_edge_count= rem_vert_count= rem_material_count= rem_group_count= rem_vweight_count= 0
for me in meshes:
if CLEAN_FACE_SMALL:
rem_face_count += rem_area_faces(me, limit)
if CLEAN_FACE_PERIMETER:
rem_face_count += rem_perimeter_faces(me, limit)
if CLEAN_EDGE_SMALL: # for all use 2- remove all edges.
rem_edge_count += rem_free_edges(me, limit)
if CLEAN_EDGE_NOFACE:
rem_edge_count += rem_free_edges(me)
if CLEAN_VERTS_FREE:
rem_vert_count += rem_free_verts(me)
if CLEAN_MATERIALS:
rem_material_count += rem_unused_materials(me)
if CLEAN_VWEIGHT or CLEAN_GROUP or CLEAN_WEIGHT_NORMALIZE:
groupNames, vWeightDict= meshWeight2Dict(me)
if CLEAN_VWEIGHT:
rem_vweight_count += rem_zero_weights(me, limit, groupNames, vWeightDict)
if CLEAN_GROUP:
rem_group_count += rem_free_groups(me, groupNames, vWeightDict)
pass
if CLEAN_WEIGHT_NORMALIZE:
normalize_vweight(me, groupNames, vWeightDict)
# Copy back to mesh vertex groups.
dict2MeshWeight(me, groupNames, vWeightDict)
if is_editmode: Window.EditMode(0)
stat_string= 'Removed from ' + str(len(meshes)) + ' Mesh(es)%t|'
if CLEAN_VERTS_FREE: stat_string+= 'Verts: %i|' % rem_edge_count
if CLEAN_EDGE_SMALL or CLEAN_EDGE_NOFACE: stat_string+= 'Edges: %i|' % rem_edge_count
if CLEAN_FACE_SMALL or CLEAN_FACE_PERIMETER: stat_string+= 'Faces: %i|' % rem_face_count
if CLEAN_MATERIALS: stat_string+= 'Materials: %i|' % rem_material_count
if CLEAN_VWEIGHT: stat_string+= 'VWeights: %i|' % rem_vweight_count
if CLEAN_GROUP: stat_string+= 'VGroups: %i|' % rem_group_count
Draw.PupMenu(stat_string)
if __name__ == '__main__':
main()
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