def test_vector_from_xy_returns_approximately_correct_value_in_tile3(self):
m = GreyCubeMap(width=1536, height=1024)
vec = m.vector_from_xy((256, 768))
self.assertTrue(-0.01 < vec.x < 0.01)
self.assertGreater(vec.y, 0.99)
self.assertTrue(-0.01 < vec.z < 0.01)
def test_vector_from_xy_returns_approximately_correct_value_in_tile2(self):
m = GreyCubeMap(width=1536, height=1024)
vec = m.vector_from_xy((1280, 256))
self.assertLess(vec.x, -0.99)
self.assertTrue(-0.01 < vec.y < 0.01, vec.y)
self.assertTrue(-0.01 < vec.z < 0.01, vec.z)