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#!BPY
"""
Name: 'Wavefront (.obj)...'
Blender: 232
Group: 'Export'
Tooltip: 'Save a Wavefront OBJ File'
"""
__author__ = "Campbell Barton, Jiri Hnidek"
__url__ = ["blender", "elysiun"]
__version__ = "1.0"
__bpydoc__ = """\
This script is an exporter to OBJ file format.
Usage:
Run this script from "File->Export" menu to export all meshes.
"""
# --------------------------------------------------------------------------
# OBJ Export v0.9b by Campbell Barton (AKA Ideasman)
# --------------------------------------------------------------------------
# ***** 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 *****
# --------------------------------------------------------------------------
#==================================================#
# New name based on old with a different extension #
#==================================================#
def newFName(ext):
return Get('filename')[: -len(Get('filename').split('.', -1)[-1]) ] + ext
def fixName(name):
if name == None:
return 'None'
else:
return name.replace(' ', '_')
from Blender import *
global MTL_DICT
# A Dict of Materials
# (material.name, image.name):matname_imagename # matname_imagename has gaps removed.
MTL_DICT = {}
def save_mtl(filename):
global MTL_DICT
world = World.GetCurrent()
if world:
worldAmb = world.getAmb()
else:
worldAmb = (0,0,0) # Default value
file = open(filename, "w")
file.write('# Blender MTL File: %s\n' % Get('filename').split('\\')[-1].split('/')[-1])
file.write('# Material Count: %i\n' % len(MTL_DICT))
# Write material/image combinations we have used.
for key, mtl_mat_name in MTL_DICT.iteritems():
# Get the Blender data for the material and the image.
# Having an image named None will make a bug, dont do it :)
file.write('newmtl %s\n' % mtl_mat_name) # Define a new material: matname_imgname
if key[0] == None:
#write a dummy material here?
file.write('Ns 0\n')
file.write('Ka %s %s %s\n' % tuple([round(c, 6) for c in worldAmb]) ) # Ambient, uses mirror colour,
file.write('Kd 0.8 0.8 0.8\n')
file.write('Ks 0.8 0.8 0.8\n')
file.write('d 1\n') # No alpha
file.write('illum 2\n') # light normaly
else:
mat = Material.Get(key[0])
file.write('Ns %s\n' % round((mat.getHardness()-1) * 1.9607843137254901 ) ) # Hardness, convert blenders 1-511 to MTL's
file.write('Ka %s %s %s\n' % tuple([round(c*mat.getAmb(), 6) for c in worldAmb]) ) # Ambient, uses mirror colour,
file.write('Kd %s %s %s\n' % tuple([round(c*mat.getRef(), 6) for c in mat.getRGBCol()]) ) # Diffuse
file.write('Ks %s %s %s\n' % tuple([round(c*mat.getSpec(), 6) for c in mat.getSpecCol()]) ) # Specular
file.write('Ni %s\n' % round(mat.getIOR(), 6)) # Refraction index
file.write('d %s\n' % round(mat.getAlpha(), 6)) # Alpha (obj uses 'd' for dissolve)
# 0 to disable lighting, 1 for ambient & diffuse only (specular color set to black), 2 for full lighting.
if mat.getMode() & Material.Modes['SHADELESS']:
file.write('illum 0\n') # ignore lighting
elif mat.getSpec() == 0:
file.write('illum 1\n') # no specular.
else:
file.write('illum 2\n') # light normaly
# Write images!
if key[1] != None: # We have an image on the face!
img = Image.Get(key[1])
file.write('map_Kd %s\n' % img.filename.split('\\')[-1].split('/')[-1]) # Diffuse mapping image
elif key[0] != None: # No face image. if we havea material search for MTex image.
for mtex in mat.getTextures():
if mtex and mtex.tex.type == Texture.Types.IMAGE:
try:
filename = mtex.tex.image.filename.split('\\')[-1].split('/')[-1]
file.write('map_Kd %s\n' % filename) # Diffuse mapping image
break
except:
# Texture has no image though its an image type, best ignore.
pass
file.write('\n\n')
file.close()
def save_obj(filename):
global MTL_DICT
time1 = sys.time()
scn = Scene.GetCurrent()
file = open(filename, "w")
# Write Header
file.write('# Blender OBJ File: %s\n' % (Get('filename').split('/')[-1].split('\\')[-1] ))
file.write('# www.blender.org\n')
# Tell the obj file what material file to use.
mtlfilename = '%s.mtl' % '.'.join(filename.split('.')[:-1])
file.write('mtllib %s\n' % ( mtlfilename.split('\\')[-1].split('/')[-1] ))
# Initialize totals, these are updated each object
totverts = totuvco = totno = 1
globalUVCoords = {}
globalNormals = {}
# Get all meshs
for ob in scn.getChildren():
#for ob in Object.GetSelected():
try:
# Will work for non meshes now! :)
m = NMesh.GetRawFromObject(ob.name)
except:
continue
faces = [ f for f in m.faces if len(f) > 2 ]
if not faces: # Make sure there is somthing to write
continue # dont bother with this mesh.
m.transform(ob.matrix)
# # Crash Blender
#materials = m.getMaterials(1) # 1 == will return None in the list.
materials = m.getMaterials()
if materials:
materialNames = map(lambda mat: mat.name, materials) # Bug Blender, dosent account for null materials, still broken.
else:
materialNames = []
# Possible there null materials, will mess up indicies
# but at least it will export, wait until Blender gets fixed.
materialNames.extend((16-len(materialNames)) * [None])
# Sort by Material, then images
# so we dont over context switch in the obj file.
faces.sort(lambda a,b: cmp((a.mat, a.image, a.smooth), (b.mat, b.image, b.smooth)))
# Set the default mat to no material and no image.
contextMat = (0, 0) # Can never be this, so we will label a new material teh first chance we get.
contextSmooth = None # Will either be true or false, set bad to force initialization switch.
file.write('o %s_%s\n' % (fixName(ob.name), fixName(m.name))) # Write Object name
# Vert
for v in m.verts:
file.write('v %.6f %.6f %.6f\n' % tuple(v.co))
# UV
if m.hasFaceUV():
for f in faces:
for uvKey in f.uv:
if not globalUVCoords.has_key(uvKey):
globalUVCoords[uvKey] = totuvco
totuvco +=1
file.write('vt %.6f %.6f 0.0\n' % uvKey)
# NORMAL, Smooth/Non smoothed.
for f in faces:
if f.smooth:
for v in f.v:
noKey = tuple(v.no)
if not globalNormals.has_key( noKey ):
globalNormals[noKey] = totno
totno +=1
file.write('vn %.6f %.6f %.6f\n' % noKey)
else:
# Hard, 1 normal from the face.
noKey = tuple(f.no)
if not globalNormals.has_key( noKey ):
globalNormals[noKey] = totno
totno +=1
file.write('vn %.6f %.6f %.6f\n' % noKey)
uvIdx = 0
for f in faces:
# MAKE KEY
if f.image: # Object is always true.
key = materialNames[f.mat], f.image.name
else:
key = materialNames[f.mat], None # No image, use None instead.
# CHECK FOR CONTEXT SWITCH
if key == contextMat:
pass # Context alredy switched, dont do anythoing
elif key[0] == None and key[1] == None:
# Write a null material, since we know the context has changed.
file.write('usemtl (null)\n') # mat, image
else:
try: # Faster to try then 2x dict lookups.
# We have the material, just need to write the context switch,
file.write('usemtl %s\n' % MTL_DICT[key]) # mat, image
except KeyError:
# First add to global dict so we can export to mtl
# Then write mtl
# Make a new names from the mat and image name,
# converting any spaces to underscores with fixName.
# If none image dont bother adding it to the name
if key[1] == None:
tmp_matname = MTL_DICT[key] ='%s' % fixName(key[0])
file.write('usemtl %s\n' % tmp_matname) # mat, image
else:
tmp_matname = MTL_DICT[key] = '%s_%s' % (fixName(key[0]), fixName(key[1]))
file.write('usemtl %s\n' % tmp_matname) # mat, image
contextMat = key
if f.smooth != contextSmooth:
if f.smooth:
file.write('s 1\n')
else:
file.write('s off\n')
contextSmooth = f.smooth
file.write('f')
if m.hasFaceUV():
if f.smooth: # Smoothed, use vertex normals
for vi, v in enumerate(f.v):
file.write( ' %d/%d/%d' % (\
v.index+totverts,\
globalUVCoords[ f.uv[vi] ],\
globalNormals[ tuple(v.no) ])) # vert, uv, normal
else: # No smoothing, face normals
no = globalNormals[ tuple(f.no) ]
for vi, v in enumerate(f.v):
file.write( ' %d/%d/%d' % (\
v.index+totverts,\
globalUVCoords[ f.uv[vi] ],\
no)) # vert, uv, normal
else: # No UV's
if f.smooth: # Smoothed, use vertex normals
for v in f.v:
file.write( ' %d//%d' % (\
v.index+totverts,\
globalNormals[ tuple(v.no) ]))
else: # No smoothing, face normals
no = globalNormals[ tuple(f.no) ]
for v in f.v:
file.write( ' %d//%d' % (\
v.index+totverts,\
no))
file.write('\n')
# Make the indicies global rather then per mesh
totverts += len(m.verts)
file.close()
# Now we have all our materials, save them
save_mtl(mtlfilename)
print "obj export time: %.2f" % (sys.time() - time1)
Window.FileSelector(save_obj, 'Export Wavefront OBJ', newFName('obj'))
'''
TIME = sys.time()
import os
OBJDIR = '/obj_out/'
for scn in Scene.Get():
scn.makeCurrent()
obj = OBJDIR + scn.name
print obj
save_obj(obj)
print "TOTAL EXPORT TIME: ", sys.time() - TIME
'''
|