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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__ = "0.9"
__bpydoc__ = """\
This script is an exporter to OBJ file format.
Usage:
Run this script from "File->Export" menu to export all meshes.
"""
# --------------------------------------------------------------------------
# OBJ Export v0.9 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 *****
# --------------------------------------------------------------------------
#==================================================#
# New name based on old with a different extension #
#==================================================#
def newFName(ext):
return Get('filename')[: -len(Get('filename').split('.', -1)[-1]) ] + ext
from Blender import *
NULL_MAT = '(null)'
NULL_IMG = '(null)' # from docs at http://astronomy.swin.edu.au/~pbourke/geomformats/obj/ also could be 'off'
def save_mtl(filename):
file = open(filename, "w")
file.write('# Blender MTL File: %s\n' % (Get('filename')))
for mat in Material.Get():
file.write('newmtl %s\n' % (mat.getName())) # Define a new material
file.write('Ns %s\n' % ((mat.getHardness()-1) * 1.9607843137254901 ) ) # Hardness, convert blenders 1-511 to MTL's
file.write('Kd %.6f %.6f %.6f\n' % tuple(mat.getRGBCol())) # Diffuse
file.write('Ka %.6f %.6f %.6f\n' % tuple(mat.getMirCol())) # Ambient, uses mirror colour,
file.write('Ks %.6f %.6f %.6f\n' % tuple(mat.getSpecCol())) # Specular
file.write('d %.6f\n' % mat.getAlpha()) # Alpha (obj uses 'd' for dissolve)
# illum, 0 to disable lightng, 2 is normal.
if mat.getMode() & Material.Modes['SHADELESS']:
file.write('illum 0\n\n') # ignore lighting
else:
file.write('illum 2\n\n') # light normaly
file.close()
def save_obj(filename):
time1 = sys.time()
scn = Scene.GetCurrent()
# First output all material
mtlfilename = '%s.mtl' % '.'.join(filename.split('.')[:-1])
save_mtl(mtlfilename)
file = open(filename, "w")
# Write Header
file.write('# Blender OBJ File: %s\n' % (Get('filename')))
file.write('# www.blender.org\n')
# Tell the obj file what material file to use.
file.write('mtllib %s\n' % ( mtlfilename.split('\\')[-1].split('/')[-1] ))
# Initialize totals, these are updated each object
totverts = totuvco = 0
# Get all meshs
for ob in scn.getChildren():
if ob.getType() != 'Mesh':
continue
m = NMesh.GetRawFromObject(ob.name)
m.transform(ob.matrix)
if not m.faces: # Make sure there is somthing to write
continue #dont bother with this mesh.
# Set the default mat
currentMatName = NULL_MAT
currentImgName = NULL_IMG
file.write('o %s_%s\n' % (ob.getName(), m.name)) # Write Object name
# Vert
for v in m.verts:
file.write('v %.6f %.6f %.6f\n' % tuple(v.co))
# UV
for f in m.faces:
for uvIdx in range(len(f.v)):
if f.uv:
file.write('vt %.6f %.6f 0.0\n' % f.uv[uvIdx])
else:
file.write('vt 0.0 0.0 0.0\n')
# NORMAL
for f in m.faces:
for v in f.v:
file.write('vn %.6f %.6f %.6f\n' % tuple(v.no))
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 %s\n' % (currentMatName))
elif currentMatName != NULL_MAT:
currentMatName = NULL_MAT
file.write('usemtl %s\n' % (currentMatName))
# UV IMAGE
# If the face uses a different image from the one last set then add a usemap line.
if f.image:
if f.image.filename != currentImgName:
currentImgName = f.image.filename
# Set a new image for all following faces
file.write( 'usemap %s\n' % currentImgName.split('\\')[-1].split('/')[-1] )
elif currentImgName != NULL_IMG: # Not using an image so set to NULL_IMG
currentImgName = NULL_IMG
# Set a new image for all following faces
file.write( 'usemap %s\n' % currentImgName) # No splitting needed.
file.write('f ')
for v in f.v:
file.write( '%s/%s/%s ' % (v.index + totverts+1, uvIdx+totuvco+1, uvIdx+totuvco+1))
uvIdx+=1
file.write('\n')
# Make the indicies global rather then per mesh
totverts += len(m.verts)
totuvco += uvIdx
file.close()
print "obj export time: %.2f" % (sys.time() - time1)
Window.FileSelector(save_obj, 'Export Wavefront OBJ', newFName('obj'))
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