factory_test.py 文件源码

def test_bezier(self):
        crv = CurveFactory.bezier([[0,0], [0,1], [1,1], [1,0], [2,0], [2,1],[1,1]])
        self.assertEqual(len(crv.knots(0)), 3)
        self.assertTrue(np.allclose(crv(0), [0,0]))
        t = crv.tangent(0)
        self.assertTrue(np.allclose(t/norm(t), [0,1]))
        t = crv.tangent(1, above=False)
        self.assertTrue(np.allclose(t/norm(t), [0,-1]))
        t = crv.tangent(1, above=True)
        self.assertTrue(np.allclose(t/norm(t), [1,0]))
        self.assertTrue(np.allclose(crv(1), [1,0]))
        self.assertTrue(crv.order(0), 4)

        # test the exact same curve, only with relative keyword
        crv = CurveFactory.bezier([[0,0], [0,1], [1,0], [0,-1], [1,0], [0,1],[1,0]], relative=True)
        self.assertEqual(len(crv.knots(0)), 3)
        self.assertTrue(np.allclose(crv(0), [0,0]))
        t = crv.tangent(0)
        self.assertTrue(np.allclose(t/norm(t), [0,1]))
        t = crv.tangent(1, above=False)
        self.assertTrue(np.allclose(t/norm(t), [0,-1]))
        t = crv.tangent(1, above=True)
        self.assertTrue(np.allclose(t/norm(t), [1,0]))
        self.assertTrue(np.allclose(crv(1), [1,0]))
        self.assertTrue(crv.order(0), 4)