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#!BPY
"""
Name: 'Wavefront (.obj)...'
Blender: 232
Group: 'Export'
Tooltip: 'Save a Wavefront OBJ File'
"""
__author__ = "Campbell Barton"
__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
#===============================================#
# Strips the slashes from the front of a string #
#===============================================#
def stripPath(path):
for CH in range(len(path), 0, -1):
if path[CH-1] == "/" or path[CH-1] == "\\":
path = path[CH:]
break
return path
#==================#
# Apply Transform #
#==================#
def apply_transform(vert, matrix):
vertCopy = Mathutils.CopyVec(vert)
vertCopy.resize4D()
return Mathutils.VecMultMat(vertCopy, matrix)
from Blender import *
NULL_MAT = '(null)'
NULL_IMG = '(null)'
def save_mtl(filename):
file = open(filename, "w")
for mat in Material.Get():
file.write('newmtl %s\n' % (mat.getName())) # Define a new material
# Hardness, convert blenders 1-511 to MTL's
file.write('Ns %s\n' % ((mat.getHardness()-1) * 1.9607843137254901 ) )
col = mat.getRGBCol()
# Diffuse
file.write('Kd %s %s %s\n' % (col[0], col[1], col[2]))
col = mat.getMirCol()
# Ambient, uses mirror colour,
file.write('Ka %s %s %s\n' % (col[0], col[1], col[2]))
col = mat.getSpecCol()
# Specular
file.write('Ks %s %s %s\n' % (col[0],col[1], col[2]))
# Alpha (dissolve)
file.write('d %s\n' % (mat.getAlpha()))
# illum, 0 to disable lightng, 2 is normal.
if mat.getMode() & Material.Modes['SHADELESS']:
file.write('illum 0\n') # ignore lighting
else:
file.write('illum 2\n') # light normaly
# End OF Mat
file.write('\n') # new line
file.close()
def save_obj(filename):
time1 = sys.time()
# First output all material
mtlfilename = filename[:-4] + '.mtl'
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' % (stripPath(mtlfilename)))
# Initialize totals, these are updated each object
totverts = totuvco = 0
# Get all meshs
for ob in Object.Get():
if ob.getType() != 'Mesh':
continue
m = NMesh.GetRawFromObject(ob.name)
# remove any edges, is not written back to the mesh so its not going to
# modify the open file.
for f in m.faces:
if len(f.v) < 3:
mesh.faces.remove(f)
if len(m.faces) == 0: # 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 ' + ob.getName() + '_' + m.name + '\n') # Write Object name
file.write('o %s_%s\n' % (ob.getName(), m.name)) # Write Object name
# Works 100% Yay
matrix = ob.getMatrix('worldspace')
# Vert
for v in m.verts:
# Transform the vert
vTx = apply_transform(v.co, matrix)
file.write('v %s %s %s\n' % (vTx[0], vTx[1], vTx[2]))
# UV
for f in m.faces:
for uvIdx in range(len(f.v)):
if f.uv:
file.write('vt %s %s 0.0\n' % (f.uv[uvIdx][0], f.uv[uvIdx][1]))
else:
file.write('vt 0.0 0.0 0.0\n')
# NORMAL
for f1 in m.faces:
for v in f1.v:
# Transform the normal
noTx = apply_transform(v.no, matrix)
noTx.normalize()
file.write('vn %s %s %s\n' % (noTx[0], noTx[1], noTx[2]))
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( 'usemat %s\n' % (stripPath(currentImgName)))
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( 'usemat %s\n' % (stripPath(currentImgName)))
file.write('f ')
for v in f.v:
file.write( '%s/%s/%s ' % (m.verts.index(v) + 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: ", sys.time() - time1
Window.FileSelector(save_obj, 'Export Wavefront OBJ', newFName('obj'))
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