Blender-ZeroEngine-MSH2-Plugin/src_research_readme/blender_2.43_scripts/mesh_cleanup.py

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#!BPY
"""
Name: 'Clean Meshes'
Blender: 245
Group: 'Mesh'
Tooltip: 'Clean unused data from all selected mesh objects.'
"""
__author__ = "Campbell Barton aka ideasman42"
__url__ = ["www.blender.org", "blenderartists.org", "www.python.org"]
__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 *
import bpy
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:
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 '''
edgeDict= {} # will use a set when python 2.4 is standard.
for f in me.faces:
for edkey in f.edge_keys:
edgeDict[edkey] = None
edges_free= []
for e in me.edges:
if not edgeDict.has_key(e.key):
edges_free.append(e)
if limit != None:
edges_free= [e for e in edges_free if e.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:
f_mat = f.mat
# Make sure the face index isnt too big. this happens sometimes.
if f_mat >= len_materials:
f_mat = f.mat = 0
material_users[f_mat] += 1
# mat_idx_subtract= 0
# reindex_mapping= dict( [(i,0) for i in xrange(len_materials)] )
reindex_mapping_ls = range(len_materials)
for i in range(len_materials-1, -1, -1):
if material_users[i] == 0:
del reindex_mapping_ls[i]
del materials[i]
rem_materials+=1
reindex_mapping= {}
for i, mat in enumerate(reindex_mapping_ls):
reindex_mapping[mat] = i
for f in me.faces:
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 unused 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 isnan(f):
fstring = str(f).lower()
if 'nan' in fstring:
return True
if 'inf' in fstring:
return True
return False
def fix_nan_verts__internal(me):
rem_nan = 0
for v in me.verts:
co = v.co
for i in (0,1,2):
if isnan(co[i]):
co[i] = 0.0
rem_nan += 1
return rem_nan
def fix_nan_verts(me):
rem_nan = 0
key = me.key
if key:
# Find the object, and get a mesh thats thinked to the oblink.
# this is a bit crap but needed to set the active key.
me_oblink = None
for ob in bpy.data.objects:
me_oblink = ob.getData(mesh=1)
if me_oblink == me:
me = me_oblink
break
if not me_oblink:
ob = None
if key and ob:
blocks = key.blocks
# print blocks
orig_pin = ob.pinShape
orig_shape = ob.activeShape
orig_relative = key.relative
ob.pinShape = True
for i, block in enumerate(blocks):
ob.activeShape = i+1
ob.makeDisplayList()
rem_nan += fix_nan_verts__internal(me)
me.update(block.name) # get the new verts
ob.pinShape = orig_pin
ob.activeShape = orig_shape
key.relative = orig_relative
else: # No keys, simple operation
rem_nan = fix_nan_verts__internal(me)
return rem_nan
def fix_nan_uvs(me):
rem_nan = 0
if me.faceUV:
orig_uvlayer = me.activeUVLayer
for uvlayer in me.getUVLayerNames():
me.activeUVLayer = uvlayer
for f in me.faces:
for uv in f.uv:
for i in (0,1):
if isnan(uv[i]):
uv[i] = 0.0
rem_nan += 1
me.activeUVLayer = orig_uvlayer
return rem_nan
def has_vcol(me):
for f in me.faces:
for col in f.col:
if not (255 == col.r == col.g == col.b):
return True
return False
def rem_white_vcol_layers(me):
vcols_removed = 0
if me.vertexColors:
for col in me.getColorLayerNames():
me.activeColorLayer = col
if not has_vcol(me):
me.removeColorLayer(col)
vcols_removed += 1
return vcols_removed
def main():
sce= bpy.data.scenes.active
obsel= list(sce.objects.context)
actob= sce.objects.active
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_WHITE_VCOL_LAYERS= Draw.Create(0)
CLEAN_GROUP= Draw.Create(0)
CLEAN_VWEIGHT= Draw.Create(0)
CLEAN_WEIGHT_NORMALIZE= Draw.Create(0)
limit= Draw.Create(0.01)
CLEAN_NAN_VERTS= Draw.Create(0)
CLEAN_NAN_UVS= Draw.Create(0)
# 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).'),\
('limit: ', limit, 0.001, 1.0, 'Limit for the area and length tests above (a higher limit will remove more data).'),\
('Material Clean', CLEAN_MATERIALS, 'Remove unused materials.'),\
('Color Layers', CLEAN_WHITE_VCOL_LAYERS, 'Remove vertex color layers that are totaly white'),\
('VGroup 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).'),\
('WeightNormalize', CLEAN_WEIGHT_NORMALIZE, 'Make the sum total of vertex weights accross vgroups 1.0 for each vertex.'),\
'Clean NAN values',\
('NAN Verts', CLEAN_NAN_VERTS, 'Make NAN or INF verts (0,0,0)'),\
('NAN UVs', CLEAN_NAN_UVS, 'Make NAN or INF UVs (0,0)'),\
'',\
('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_WHITE_VCOL_LAYERS= CLEAN_WHITE_VCOL_LAYERS.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
CLEAN_NAN_VERTS= CLEAN_NAN_VERTS.val
CLEAN_NAN_UVS= CLEAN_NAN_UVS.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 bpy.data.objects if ob.type == 'Mesh' if not ob.lib]
else:
meshes= bpy.data.meshes
else:
meshes= [ob.getData(mesh=1) for ob in obsel if ob.type == 'Mesh']
tot_meshes = len(meshes) # so we can decrement libdata
rem_face_count= rem_edge_count= rem_vert_count= rem_material_count= rem_vcol_layer_count= rem_group_count= rem_vweight_count= fix_nan_vcount= fix_nan_uvcount= 0
if not meshes:
if is_editmode: Window.EditMode(1)
Draw.PupMenu('No meshes to clean')
Blender.Window.WaitCursor(1)
bpy.data.meshes.tag = False
for me in meshes:
# Dont touch the same data twice
if me.tag:
tot_meshes -= 1
continue
me.tag = True
if me.lib:
tot_meshes -= 1
continue
if me.multires:
multires_level_orig = me.multiresDrawLevel
me.multiresDrawLevel = 1
print 'Warning, cannot perform destructive operations on multires mesh:', me.name
else:
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_WHITE_VCOL_LAYERS:
rem_vcol_layer_count += rem_white_vcol_layers(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 CLEAN_NAN_VERTS:
fix_nan_vcount = fix_nan_verts(me)
if CLEAN_NAN_UVS:
fix_nan_uvcount = fix_nan_uvs(me)
# restore multires.
if me.multires:
me.multiresDrawLevel = multires_level_orig
Blender.Window.WaitCursor(0)
if is_editmode: Window.EditMode(0)
stat_string= 'Removed from ' + str(tot_meshes) + ' Mesh(es)%t|'
if CLEAN_VERTS_FREE: stat_string+= 'Verts: %i|' % rem_vert_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_WHITE_VCOL_LAYERS: stat_string+= 'Color Layers: %i|' % rem_vcol_layer_count
if CLEAN_VWEIGHT: stat_string+= 'VWeights: %i|' % rem_vweight_count
if CLEAN_GROUP: stat_string+= 'VGroups: %i|' % rem_group_count
if CLEAN_NAN_VERTS: stat_string+= 'Vert Nan Fix: %i|' % fix_nan_vcount
if CLEAN_NAN_UVS: stat_string+= 'UV Nan Fix: %i|' % fix_nan_uvcount
Draw.PupMenu(stat_string)
if __name__ == '__main__':
main()