OBJ files

import pygamefrom OpenGL.GL import *from OpenGL.GLU import *class objloader:    def display():        glCallList(self.list)    def load(self, filename):        starttime = time.time()        vertices = []        normals = []        texcoords = []        faces = []        for line in file(filename, "r"):            values = line.split()            if not values: continue            elif values[0].startswith("#"):                continue            elif values[0] == "v":                vertices.append( [float(x) for x in values[1:4]] )            elif values[0] == "vn":                normals.append( [float(x) for x in values[1:4]] )            elif values[0] == "vt":                texcoords.append( [float(x) for x in values[1:4]] )            elif values[0] == "f":                face = []                for elem in values[1:]:                    face.append ( [int(x) - 1 for x in elem.split("/")] )                faces.append( face )        avnorms = []        for i in range(len(vertices)):            avnorms.append([])        for elem in faces:            for (v, t, n) in elem:                avnorms[v].append(normals[n])        for i in range(len(avnorms)):            x, y, z = 0.0, 0.0, 0.0            num = float(len(avnorms))            if num:                for value in avnorms:                    x = x + value[0]                    y = y + value[1]                    z = z + value[2]                avnorms = ( x /  num, y / num, z / num )            else: avnorms = (0, 0, 1)                                self.list = glGenLists(1)        glNewList(self.list, GL_COMPILE)                            glBegin(GL_TRIANGLES)        for face in faces:            for (vi, ti, ni) in face:                glNormal3fv( avnorms[vi] )                glTexCoord2fv( texcoords[ti] )                glVertex3fv(vertices[vi] )        glEnd()        glEndList()        print 'loading "%s" (%.1fms)'% (filename, (time.time() - starttime) * 1000.0)