20f4632340
https://projects.blender.org/tracker/?func=detail&aid=1874&group_id=9&atid=125 normal vectors of vertexes are exported correctly now
227 lines
6.5 KiB
Python
227 lines
6.5 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 v0.9 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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#===============================================#
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# Strips the slashes from the front of a string #
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#===============================================#
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def stripPath(path):
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for CH in range(len(path), 0, -1):
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if path[CH-1] == "/" or path[CH-1] == "\\":
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path = path[CH:]
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break
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return path
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#==================#
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# Apply Transform #
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#==================#
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def apply_transform(vert, matrix_4x4):
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vertCopy = Mathutils.CopyVec(vert)
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vertCopy.resize4D()
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return Mathutils.VecMultMat(vertCopy, matrix_4x4)
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#=================================#
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# Apply Transform (normal vector) #
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#=================================#
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def apply_normal_transform(norm, matrix_3x3):
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vertCopy = Mathutils.CopyVec(norm)
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vertCopy.resize3D()
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return Mathutils.VecMultMat(vertCopy, matrix_3x3)
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from Blender import *
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NULL_MAT = '(null)'
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NULL_IMG = '(null)'
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def save_mtl(filename):
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file = open(filename, "w")
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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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# Hardness, convert blenders 1-511 to MTL's
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file.write('Ns %s\n' % ((mat.getHardness()-1) * 1.9607843137254901 ) )
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col = mat.getRGBCol()
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# Diffuse
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file.write('Kd %s %s %s\n' % (col[0], col[1], col[2]))
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col = mat.getMirCol()
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# Ambient, uses mirror colour,
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file.write('Ka %s %s %s\n' % (col[0], col[1], col[2]))
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col = mat.getSpecCol()
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# Specular
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file.write('Ks %s %s %s\n' % (col[0],col[1], col[2]))
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# Alpha (dissolve)
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file.write('d %s\n' % (mat.getAlpha()))
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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') # ignore lighting
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else:
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file.write('illum 2\n') # light normaly
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# End OF Mat
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file.write('\n') # new line
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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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# First output all material
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mtlfilename = filename[:-4] + '.mtl'
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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' % (stripPath(mtlfilename)))
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# Initialize totals, these are updated each object
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totverts = totuvco = 0
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# Get all meshs
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for ob in Object.Get():
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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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# remove any edges, is not written back to the mesh so its not going to
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# modify the open file.
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for f in m.faces:
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if len(f.v) < 3:
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m.faces.remove(f)
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if len(m.faces) == 0: # Make sure there is somthing to write.
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continue #dont bother with this mesh.
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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 ' + ob.getName() + '_' + m.name + '\n') # Write Object name
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file.write('o %s_%s\n' % (ob.getName(), m.name)) # Write Object name
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# Works 100% Yay
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matrix_4x4 = ob.getMatrix('worldspace')
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# matrix for transformation of normal vectors
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matrix_3x3 = Mathutils.Matrix([matrix_4x4[0][0], matrix_4x4[0][1], matrix_4x4[0][2]],
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[matrix_4x4[1][0], matrix_4x4[1][1], matrix_4x4[1][2]],
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[matrix_4x4[2][0], matrix_4x4[2][1], matrix_4x4[2][2]])
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# Vert
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for v in m.verts:
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# Transform the vert
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vTx = apply_transform(v.co, matrix_4x4)
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file.write('v %s %s %s\n' % (vTx[0], vTx[1], vTx[2]))
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# UV
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for f in m.faces:
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for uvIdx in range(len(f.v)):
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if f.uv:
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file.write('vt %s %s 0.0\n' % (f.uv[uvIdx][0], f.uv[uvIdx][1]))
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else:
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file.write('vt 0.0 0.0 0.0\n')
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# NORMAL
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for f1 in m.faces:
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for v in f1.v:
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# Transform the normal
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noTx = apply_normal_transform(v.no, matrix_3x3)
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noTx.normalize()
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file.write('vn %s %s %s\n' % (noTx[0], noTx[1], noTx[2]))
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uvIdx = 0
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for f in m.faces:
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# Check material and change if needed.
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if len(m.materials) > f.mat:
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if currentMatName != m.materials[f.mat].getName():
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currentMatName = m.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( 'usemat %s\n' % (stripPath(currentImgName)))
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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 new image for all following faces
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file.write( 'usemat %s\n' % (stripPath(currentImgName)))
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file.write('f ')
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for v in f.v:
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file.write( '%s/%s/%s ' % (m.verts.index(v) + totverts+1, uvIdx+totuvco+1, uvIdx+totuvco+1))
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uvIdx+=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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totuvco += uvIdx
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file.close()
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print "obj export time: ", sys.time() - time1
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Window.FileSelector(save_obj, 'Export Wavefront OBJ', newFName('obj'))
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