vert, t, normals, f = load_obj('diablo3_pose.obj')
for face in f:
    screen_coord = []
    world_coord = []
    for j in range(3):
        v = Vec3(vert[face[j][0]])
        screen_coord.append(Vec2((v.x+1.)*width/2., (v.y+1.)*height/2.))
        world_coord.append(v)
    for i in range(3):
        screen_coord[i] = Vec2(int(screen_coord[i].x), int(screen_coord[i].y))

    n = (world_coord[2] - world_coord[0]) ^ (world_coord[1] - world_coord[0]).normalize()
    intensity = n.x*light_dir.x + n.y*light_dir.y + n.z*light_dir.z
    intensity *= 10
    print intensity
    if intensity > 0:
        triangle( screen_coord[0], screen_coord[1], screen_coord[2], (255*intensity,255,255))