def METHOD_NAME(self):
    from trimesh.path import segments
    # check 2D and 3D
    for dimension in [2, 3]:
        # a bunch of random line segments
        s = g.random((100, 2, dimension))
        # convert segment to point on line closest to origin
        # as well as a vector and two distances along vector
        param = segments.segments_to_parameters(s)
        # convert parameterized back to segments
        roundtrip = segments.parameters_to_segments(*param)
        # they should be the same after a roundtrip
        assert g.np.allclose(s, roundtrip)
        # make index 1 the first segment but offset along vector
        # IE make s[0] colinear with s[1]
        s[1] = s[0] + 10 * (s[0][0] - s[0][1])
        # calculate colinear pairs
        colinear = segments.colinear_pairs(s)
        # due to our wangling the first and second index
        # should be a colinear pair
        assert {0, 1} in [set(i) for i in colinear]