def test_chain(self):
s = Matrix44.scale(10, 20, 30)
t = Matrix44.translate(10, 20, 30)
c = Matrix44.chain(s, t)
x = diag((10., 20., 30., 1.))
x[3, 0] = 10.
x[3, 1] = 20.
x[3, 2] = 30.
self.assertTrue(equal_matrix(c, x))
def test_chain2(self):
s = Matrix44.scale(10, 20, 30)
t = Matrix44.translate(10, 20, 30)
r = Matrix44.axis_rotate(angle=pi / 2, axis=(0., 0., 1.))
points = ((23., 97., .5), (2., 7., 13.))
p1 = s.transform_vectors(points)
p1 = t.transform_vectors(p1)
p1 = r.transform_vectors(p1)
c = Matrix44.chain(s, t, r)
p2 = c.transform_vectors(points)
self.assertTrue(equal_vectors(p1, p2))
def write(filename, sponge, merge=False):
dwg = ezdxf.new('R2000')
transform = Matrix44.chain(Matrix44.z_rotate(math.radians(45)),
Matrix44.translate(5, 3, 4))
sponge.render(dwg.modelspace(), merge=merge, matrix=transform)
dwg.saveas(filename)