forked from bartvdbraak/blender
f6ff9ec608
- Jean-Michel Soler: 1) paths import -- ai module; 2) tex2uvbaker; - Campbell Barton: obj exporter. BPython: - Campbell also provided a patch (+docs) to add shader data access to Blender.Material. Again, thanks guys and sorry for the long delay.
183 lines
5.7 KiB
Python
183 lines
5.7 KiB
Python
#!BPY
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"""
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Name: 'Wavefront (.obj)...'
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Blender: 232
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Group: 'Export'
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Tooltip: 'Save a Wavefront OBJ File'
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"""
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__author__ = "Campbell Barton, Jiri Hnidek"
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__url__ = ["blender", "elysiun"]
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__version__ = "0.9"
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__bpydoc__ = """\
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This script is an exporter to OBJ file format.
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Usage:
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Run this script from "File->Export" menu to export all meshes.
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"""
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# --------------------------------------------------------------------------
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# OBJ Export v0.9b by Campbell Barton (AKA Ideasman)
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# --------------------------------------------------------------------------
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# ***** BEGIN GPL LICENSE BLOCK *****
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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#
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# ***** END GPL LICENCE BLOCK *****
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# --------------------------------------------------------------------------
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#==================================================#
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# New name based on old with a different extension #
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#==================================================#
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def newFName(ext):
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return Get('filename')[: -len(Get('filename').split('.', -1)[-1]) ] + ext
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from Blender import *
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NULL_MAT = '(null)'
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NULL_IMG = '(null)' # from docs at http://astronomy.swin.edu.au/~pbourke/geomformats/obj/ also could be 'off'
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def save_mtl(filename):
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file = open(filename, "w")
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file.write('# Blender MTL File: %s\n' % (Get('filename')))
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for mat in Material.Get():
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file.write('newmtl %s\n' % (mat.getName())) # Define a new material
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file.write('Ns %s\n' % ((mat.getHardness()-1) * 1.9607843137254901 ) ) # Hardness, convert blenders 1-511 to MTL's
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file.write('Kd %.6f %.6f %.6f\n' % tuple(mat.getRGBCol())) # Diffuse
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file.write('Ka %.6f %.6f %.6f\n' % tuple(mat.getMirCol())) # Ambient, uses mirror colour,
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file.write('Ks %.6f %.6f %.6f\n' % tuple(mat.getSpecCol())) # Specular
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file.write('Ni %.6f\n' % mat.getIOR()) # Refraction index
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file.write('d %.6f\n' % mat.getAlpha()) # Alpha (obj uses 'd' for dissolve)
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# illum, 0 to disable lightng, 2 is normal.
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if mat.getMode() & Material.Modes['SHADELESS']:
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file.write('illum 0\n\n') # ignore lighting
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else:
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file.write('illum 2\n\n') # light normaly
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file.close()
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def save_obj(filename):
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time1 = sys.time()
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scn = Scene.GetCurrent()
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# First output all material
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mtlfilename = '%s.mtl' % '.'.join(filename.split('.')[:-1])
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save_mtl(mtlfilename)
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file = open(filename, "w")
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# Write Header
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file.write('# Blender OBJ File: %s\n' % (Get('filename')))
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file.write('# www.blender.org\n')
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# Tell the obj file what material file to use.
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file.write('mtllib %s\n' % ( mtlfilename.split('\\')[-1].split('/')[-1] ))
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# Initialize totals, these are updated each object
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totverts = totuvco = 0
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globalUVCoords = {}
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# Get all meshs
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for ob in scn.getChildren():
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if ob.getType() != 'Mesh':
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continue
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m = NMesh.GetRawFromObject(ob.name)
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m.transform(ob.matrix)
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if not m.faces: # Make sure there is somthing to write
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continue #dont bother with this mesh.
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faces = [ f for f in m.faces if len(f) > 2 ]
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materials = m.materials
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# Sort by Material so we dont over context switch in the obj file.
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if len(materials) > 1:
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faces.sort(lambda a,b: cmp(a.mat, b.mat))
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# Set the default mat
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currentMatName = NULL_MAT
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currentImgName = NULL_IMG
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file.write('o %s_%s\n' % (ob.getName(), m.name)) # Write Object name
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# Vert
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for v in m.verts:
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file.write('v %.6f %.6f %.6f\n' % tuple(v.co))
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# UV
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if m.hasFaceUV():
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for f in faces:
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for uv in f.uv:
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uvKey = '%.6f %.6f' % uv
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try:
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dummy = globalUVCoords[uvKey]
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except KeyError:
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totuvco +=1 # 1 based index.
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globalUVCoords[uvKey] = totuvco
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file.write('vt %s 0.0\n' % uvKey)
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# NORMAL
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for v in m.verts:
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file.write('vn %.6f %.6f %.6f\n' % tuple(v.no))
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uvIdx = 0
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for f in faces:
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# Check material and change if needed.
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if len(materials) > 0:
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if currentMatName != materials[f.mat].getName():
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currentMatName = materials[f.mat].getName()
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file.write('usemtl %s\n' % (currentMatName))
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elif currentMatName != NULL_MAT:
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currentMatName = NULL_MAT
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file.write('usemtl %s\n' % (currentMatName))
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# UV IMAGE
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# If the face uses a different image from the one last set then add a usemap line.
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if f.image:
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if f.image.filename != currentImgName:
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currentImgName = f.image.filename
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# Set a new image for all following faces
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file.write( 'usemap %s\n' % currentImgName.split('\\')[-1].split('/')[-1] )
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elif currentImgName != NULL_IMG: # Not using an image so set to NULL_IMG
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currentImgName = NULL_IMG
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# Set a ne w image for all following faces
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file.write( 'usemap %s\n' % currentImgName) # No splitting needed.
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file.write('f')
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if m.hasFaceUV():
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for vi, v in enumerate(f.v):
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uvIdx = globalUVCoords[ '%.6f %.6f' % f.uv[vi] ]
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i = v.index + totverts + 1
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file.write( ' %d/%d/%d' % (i, uvIdx, i)) # vert, uv, normal
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else: # No UV's
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for v in f.v:
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file.write( ' %d' % (v.index + totverts+1))
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file.write('\n')
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# Make the indicies global rather then per mesh
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totverts += len(m.verts)
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file.close()
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print "obj export time: %.2f" % (sys.time() - time1)
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Window.FileSelector(save_obj, 'Export Wavefront OBJ', newFName('obj'))
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