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#!BPY
"""
Name: 'Wavefront (.obj)...'
Blender: 232
Group: 'Export'
Tooltip: 'Save a Wavefront OBJ File'
"""
# $Id$
#
# --------------------------------------------------------------------------
# OBJ Export v0.9 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 *****
# --------------------------------------------------------------------------
#================================================#
# Gets the world matrix of an object #
# by multiplying by parents mat's recursively #
# This only works in some simple situations, #
# needs work.... #
#================================================#
def getWorldMat(ob):
mat = ob.getMatrix()
p = ob.getParent()
if p != None:
mat = mat + getWorldMat(p)
return mat
#==================#
# Apply Transform #
#==================#
def apply_transform(verts, matrix):
verts.resize4D()
return Mathutils.VecMultMat(verts, matrix)
#====================================================#
# Return a 6 deciaml point floating point value #
# as a string that dosent have any python chars #
#====================================================#
def saneFloat(float):
#return '%(float)b' % vars() # 6 fp as house.hqx
return str('%f' % float) + ' '
from Blender import *
NULL_MAT = '(null)'
def save_obj(filename):
if filename.find('.obj', -4) <= 0: filename += '.obj' # for safety
file = open(filename, "w")
# Write Header
file.write('# Blender OBJ File: ' + Get('filename') + ' \n')
file.write('# www.blender.org\n')
# Get all meshs
for ob in Object.Get():
if ob.getType() == 'Mesh':
m = ob.getData()
if len(m.verts) > 0: # Make sure there is somthing to write.
# Set the default mat
currentMatName = ''
file.write('o ' + ob.getName() + '_' + m.name + '\n') # Write Object name
# Dosent work properly,
matrix = getWorldMat(ob)
# Vert
for v in m.verts:
# Transform the vert
vTx = apply_transform(v.co, matrix)
file.write('v ')
file.write(saneFloat(vTx[0]))
file.write(saneFloat(vTx[1]))
file.write(saneFloat(vTx[2]) + '\n')
# UV
for f in m.faces:
for uvIdx in range(len(f.v)):
file.write('vt ')
if f.uv:
file.write(saneFloat(f.uv[uvIdx][0]))
file.write(saneFloat(f.uv[uvIdx][1]))
else:
file.write('0.0 ')
file.write('0.0 ')
file.write('0.0' + '\n')
# NORMAL
for f in m.faces:
for v in f.v:
# Transform the normal
noTx = apply_transform(v.no, matrix)
noTx.normalize()
file.write('vn ')
file.write(saneFloat(noTx[0]))
file.write(saneFloat(noTx[1]))
file.write(saneFloat(noTx[2]) + '\n')
uvIdx = 0
for f in m.faces:
# Check material and change if needed.
if len(m.materials) > f.mat:
if currentMatName != m.materials[f.mat].getName():
currentMatName = m.materials[f.mat].getName()
file.write('usemtl ' + currentMatName + '\n')
elif currentMatName != NULL_MAT:
currentMatName = NULL_MAT
file.write('usemtl ' + currentMatName + '\n')
file.write('f ')
for v in f.v:
file.write( str(m.verts.index(v) +1) + '/') # Vert IDX
file.write( str(uvIdx +1) + '/') # UV IDX
file.write( str(uvIdx +1) + ' ') # NORMAL IDX
uvIdx+=1
file.write('\n')
file.close()
Window.FileSelector(save_obj, 'Export OBJ')
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