new Vector4d(7/16., 9/16., 0/16., 2/16.));
uvtriangles = new UVTriangle[4];
// facing south
uvtriangles[0] = new UVTriangle(
new Vector3d(8/16., 3/16., 9/16.),
new Vector3d(24/16., 3/16., 9/16.),
new Vector3d((4-12/10.)/16., 1, 9/16.),
new Vector2d(0, 0),
new Vector2d(1, 0),
new Vector2d(0., 13/16.));
uvtriangles[1] = new UVTriangle(
new Vector3d((20-12/10.)/16., 1, 9/16.),
new Vector3d((4-12/10.)/16., 1, 9/16.),
new Vector3d(24/16., 3/16., 9/16.),
new Vector2d(1, 13/16.),
new Vector2d(0, 13/16.),
new Vector2d(1, 0));
// facing north
uvtriangles[2] = new UVTriangle(
new Vector3d(24/16., 3/16., 7/16.),
new Vector3d(8/16., 3/16., 7/16.),
new Vector3d((4-12/10.)/16., 1, 7/16.),
new Vector2d(1, 0),
new Vector2d(0, 0),
new Vector2d(0, 13/16.));
uvtriangles[3] = new UVTriangle(
new Vector3d((4-12/10.)/16., 1, 7/16.),
new Vector3d((20-12/10.)/16., 1, 7/16.),
new Vector3d(24/16., 3/16., 7/16.),
new Vector2d(0, 13/16.),
new Vector2d(1, 13/16.),