def test_trimesh_face_normals():
points = np.array([[0.0, 0.0, -1.0], [1.0, 0.0, 0.0], [1.0, 1.0, 0.0],
[0.0, 1.0, 0.0]])
trilist = np.array([[0, 1, 3], [1, 2, 3]])
expected_normals = np.array(
[[-np.sqrt(3) / 3, -np.sqrt(3) / 3,
np.sqrt(3) / 3], [-0, -0, 1]])
trimesh = TriMesh(points, trilist=trilist)
face_normals = trimesh.tri_normals()
assert_allclose(face_normals, expected_normals)
trimesh.points = trimesh.points.astype(np.float32)
face_normals = trimesh.tri_normals()
assert_allclose(face_normals, expected_normals)
def test_trimesh_face_normals():
points = np.array([[0.0, 0.0, -1.0],
[1.0, 0.0, 0.0],
[1.0, 1.0, 0.0],
[0.0, 1.0, 0.0]])
trilist = np.array([[0, 1, 3],
[1, 2, 3]])
expected_normals = np.array([[-np.sqrt(3)/3, -np.sqrt(3)/3, np.sqrt(3)/3],
[-0, -0, 1]])
trimesh = TriMesh(points, trilist=trilist)
face_normals = trimesh.tri_normals()
assert_allclose(face_normals, expected_normals)
trimesh.points = trimesh.points.astype(np.float32)
face_normals = trimesh.tri_normals()
assert_allclose(face_normals, expected_normals)
def test_trimesh_vertex_normals():
points = np.array([[0.0, 0.0, -1.0], [1.0, 0.0, 0.0], [1.0, 1.0, 0.0],
[0.0, 1.0, 0.0]])
trilist = np.array([[0, 1, 3], [1, 2, 3]])
# 0 and 2 are the corner of the triangles and so the maintain the
# face normals. The other two are the re-normalized vertices:
# normalize(n0 + n2)
expected_normals = np.array(
[[-np.sqrt(3) / 3, -np.sqrt(3) / 3,
np.sqrt(3) / 3], [-0.32505758, -0.32505758, 0.88807383], [0, 0, 1],
[-0.32505758, -0.32505758, 0.88807383]])
trimesh = TriMesh(points, trilist)
vertex_normals = trimesh.vertex_normals()
assert_allclose(vertex_normals, expected_normals)
trimesh.points = trimesh.points.astype(np.float32)
vertex_normals = trimesh.vertex_normals()
assert_allclose(vertex_normals, expected_normals)
def test_trimesh_vertex_normals():
points = np.array([[0.0, 0.0, -1.0],
[1.0, 0.0, 0.0],
[1.0, 1.0, 0.0],
[0.0, 1.0, 0.0]])
trilist = np.array([[0, 1, 3],
[1, 2, 3]])
# 0 and 2 are the corner of the triangles and so the maintain the
# face normals. The other two are the re-normalized vertices:
# normalize(n0 + n2)
expected_normals = np.array([[-np.sqrt(3)/3, -np.sqrt(3)/3, np.sqrt(3)/3],
[-0.32505758, -0.32505758, 0.88807383],
[0, 0, 1],
[-0.32505758, -0.32505758, 0.88807383]])
trimesh = TriMesh(points, trilist)
vertex_normals = trimesh.vertex_normals()
assert_allclose(vertex_normals, expected_normals)
trimesh.points = trimesh.points.astype(np.float32)
vertex_normals = trimesh.vertex_normals()
assert_allclose(vertex_normals, expected_normals)
