#!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 ***** # -------------------------------------------------------------------------- #==================================================# # 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 #================================================# # 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(vert, matrix): vertCopy = Mathutils.CopyVec(vert) vertCopy.resize4D() return Mathutils.VecMultMat(vertCopy, 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)' NULL_IMG = '(null)' def save_mtl(filename): file = open(filename, "w") for mat in Material.Get(): file.write('newmtl ' + mat.getName() + '\n') # Define a new material file.write('Ns ' + saneFloat((mat.getHardness()-1) * 1.9607843137254901 ) + '\n') # Hardness, convert blenders 1-511 to MTL's col = mat.getRGBCol() file.write('Kd ' + saneFloat(col[0]) + saneFloat(col[1]) + saneFloat(col[2]) +'\n') # Diffuse col = mat.getMirCol() file.write('Ka ' + saneFloat(col[0]) + saneFloat(col[1]) + saneFloat(col[2]) + '\n') # Ambient, uses mirror colour, col = mat.getSpecCol() file.write('Ks ' + saneFloat(col[0]) + saneFloat(col[1]) + saneFloat(col[2]) +'\n') # Specular file.write('d ' + saneFloat(mat.getAlpha()) +'\n') # Alpha (dissolve) # illum, 0 to disable lightng, 2 is normal. file.write('illum ') if mat.getMode() & Material.Modes['SHADELESS']: file.write('0\n') # ignore lighting else: file.write('2\n') # light normaly # End OF Mat file.write('\n') # new line file.close() def save_obj(filename): # First output all material mtlfilename = filename[:-4] + '.mtl' save_mtl(mtlfilename) file = open(filename, "w") # Write Header file.write('# Blender OBJ File: ' + Get('filename') + ' \n') file.write('# www.blender.org\n') # Tell the obj file what file to use. file.write('mtllib ' + stripPath(mtlfilename) + ' \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 = NULL_MAT currentImgName = NULL_IMG file.write('o ' + ob.getName() + '_' + m.name + '\n') # Write Object name # Dosent work properly, matrix = getWorldMat(ob) smooth = 0 # 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: if len(f.v) > 2: 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 f1 in m.faces: if len(f1.v) > 2: for v in f1.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: if len(f.v) > 2: # 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') # 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 file.write( 'usemat ' + stripPath(currentImgName) +'\n') # Set a new image for all following faces elif currentImgName != NULL_IMG: # Not using an image so set to NULL_IMG currentImgName = NULL_IMG file.write( 'usemat ' + stripPath(currentImgName) +'\n') # Set a new image for all following faces if f.smooth == 1: if smooth == 0: smooth = 1 file.write('s 1\n') if f.smooth == 0: if smooth == 1: smooth = 0 file.write('s off\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', newFName('obj'))