def test_mul(self):
a = Matrix33.identity()
b = Matrix33.scaling(0.5, 0.5)
c = a * b
self.assertEqual((c.m00, c.m01, c.m10, c.m11), (0.5, 0.0, 0.0, 0.5))
def test_identity(self):
matrix = Matrix33.identity()
values = [matrix.m00, matrix.m01,
matrix.m10, matrix.m11]
self.assertEqual(values, [1.0, 0.0,
0.0, 1.0])
def test_rotation(self):
matrix = Matrix33.rotation(90)
vector = matrix.transform(Vector2(1.0, 1.0))
# Fix floating point issues.
x, y = ceil(vector.x), ceil(vector.y)
self.assertEqual((x, y), (-1.0, 1.0))
def test_scaling(self):
matrix = Matrix33.scaling(0.5, 0.5)
vector = matrix.transform(Vector2(1.0, 1.0))
self.assertEqual((vector.x, vector.y), (0.5, 0.5))
def test_transform(self):
matrix = Matrix33.identity()
vector = matrix.transform(Vector2(1.0, 2.0))
self.assertEqual((vector.x, vector.y), (1.0, 2.0))
