def test_translate(self):
translation = (100, 200)
t = AffineTransform()
t.translate(translation[0], translation[1])
p = t.transformPoint(0, 0)
for i in range(0, len(p)):
self.assertAlmostEqual(p[i], translation[i])
def test_invert(self):
t = AffineTransform()
t.rotate(-math.pi / 2.0)
t.scale(4.0, 3.0)
t.translate(100, 100)
p = t.transformPoint(0, 0)
t.invert()
p = t.transformPoint(p[0], p[1])
for i in range(0, len(p)):
self.assertAlmostEqual(p[i], 0)
def test_multiply(self):
t1 = AffineTransform()
t1.rotate(math.pi / 2.0)
t2 = AffineTransform()
t2.translate(2, 4)
t3 = AffineTransform()
t3.scale(3, 5)
p = (20, 20)
p1 = (p[0], p[1])
p1 = t1.transformPoint(p1[0], p1[1])
p1 = t2.transformPoint(p1[0], p1[1])
p1 = t3.transformPoint(p1[0], p1[1])
t4 = AffineTransform()
t4.multiply(t1)
t4.multiply(t2)
t4.multiply(t3)
p2 = t4.transformPoint(p[0], p[1])
for i in range(0, len(p1)):
self.assertAlmostEqual(p1[i], p2[i])
