class TestModelViewNormalMatrices(unittest.TestCase):
def setUp(self):
self.phys = Physical(position=[10, 20, 30],
rotation=(90, 0, 0),
scale=3)
def test_correct_modelmatrix(self):
correct_modelmat = np.array([[3., 0., 0., 10.], [0., 0., -3., 20.],
[0., 3., 0., 30.], [0., 0., 0., 1.]],
dtype=np.float32)
self.assertTrue(
np.isclose(self.phys.model_matrix,
correct_modelmat,
rtol=1e-3,
atol=1e-3).all())
def test_correct_normalmatrix(self):
correct_normalmat = np.linalg.inv(self.phys.model_matrix.T)
self.assertTrue(
np.isclose(self.phys.normal_matrix,
correct_normalmat,
rtol=1e-3,
atol=1e-3).all())
def test_correct_viewmatrix(self):
correct_modelmat_without_scale = np.array(
[[1., 0., 0., 10.], [0., 0., -1., 20.], [0., 1., 0., 30.],
[0., 0., 0., 1.]],
dtype=np.float32)
correct_viewmat = np.linalg.inv(correct_modelmat_without_scale)
self.assertTrue(
np.isclose(self.phys.view_matrix,
correct_viewmat,
rtol=1e-3,
atol=1e-3).all())
def test_update_doesnt_alter_mats(self):
modelmat, normalmat, viewmat = self.phys.model_matrix.copy(
), self.phys.normal_matrix.copy(), self.phys.view_matrix.copy()
self.phys.update()
self.assertTrue((modelmat == self.phys.model_matrix).all())
self.assertTrue((normalmat == self.phys.normal_matrix).all())
self.assertTrue((viewmat == self.phys.view_matrix).all())
class TestModelViewNormalMatrices(unittest.TestCase):
def setUp(self):
self.phys = Physical(position=[10, 20, 30],
rotation=(90, 0, 0),
scale=3)
def test_correct_modelmatrix(self):
correct_modelmat = np.array([[3., 0., 0., 10.], [0., 0., -3., 20.],
[0., 3., 0., 30.], [0., 0., 0., 1.]],
dtype=np.float32)
self.assertTrue(
np.isclose(self.phys.model_matrix,
correct_modelmat,
rtol=1e-3,
atol=1e-3).all())
def test_correct_normalmatrix(self):
correct_normalmat = np.linalg.inv(self.phys.model_matrix.T)
self.assertTrue(
np.isclose(self.phys.normal_matrix,
correct_normalmat,
rtol=1e-3,
atol=1e-3).all())
def test_correct_viewmatrix(self):
correct_modelmat_without_scale = np.array(
[[1., 0., 0., 10.], [0., 0., -1., 20.], [0., 1., 0., 30.],
[0., 0., 0., 1.]],
dtype=np.float32)
correct_viewmat = np.linalg.inv(correct_modelmat_without_scale)
self.assertTrue(
np.isclose(self.phys.view_matrix,
correct_viewmat,
rtol=1e-3,
atol=1e-3).all())
def test_update_doesnt_alter_mats(self):
modelmat, normalmat, viewmat = self.phys.model_matrix.copy(
), self.phys.normal_matrix.copy(), self.phys.view_matrix.copy()
self.phys.update()
self.assertTrue((modelmat == self.phys.model_matrix).all())
self.assertTrue((normalmat == self.phys.normal_matrix).all())
self.assertTrue((viewmat == self.phys.view_matrix).all())
def test_look_at_makes_correct_viewmatrix(self):
"""Makes sure that the projection of a looked-at point is centered onscreen."""
for _ in range(200):
phys = Physical(position=np.random.uniform(-3, 3, size=3),
rotation=np.random.uniform(-3, 3, size=3),
scale=np.random.uniform(-5, 5, size=3))
x, y, z = np.random.uniform(-5, 5, size=3)
phys.look_at(x, y, z)
view_projection = np.dot(phys.view_matrix,
np.matrix([x, y, z, 1]).T)
self.assertTrue(
np.isclose(view_projection[:2], 0, atol=1e-4).all())
