# Wavefron .obj file loader

from raytracer import Triangle, NormalVertex

def LoadWavefrontObjFile(rt, filename, mat, scale):

	vertices = []

	fp = file(filename)

	while True:

		ln = fp.readline()

		if ln == "":

			break;

		ln = ln.split()

		if ln[0] == "v":

			v = [scale*float(x) for x in ln[1:4]]

			vertices.append(tuple(v))

		if ln[0] == "f":

			f = [vertices[int(x)-1] for x in ln[1:4]]

			face = Triangle(NormalVertex(f[0]), NormalVertex(f[1]), NormalVertex(f[2]), mat)

			rt.addshape(face)