def test_perspectivelens_extrude_depth():
lens = PerspectiveLens()
lens.set_fov(90, 90)
lens.set_near_far(0.5, 100)
point = Point3()
assert lens.extrude_depth((0, 0, -1), point)
assert point.almost_equal((0, 0.5, 0), 0.001)
assert lens.extrude_depth((0, 0, 1), point)
assert point.almost_equal((0, 100, 0), 0.001)
assert lens.extrude_depth((-1, -1, -1), point)
assert point.almost_equal((-0.5, 0.5, -0.5), 0.001)
assert lens.extrude_depth((-1, -1, 1), point)
assert point.almost_equal((-100, 100, -100), 0.1)
assert lens.extrude_depth((1, 0, -1), point)
assert point.almost_equal((0.5, 0.5, 0), 0.001)
assert lens.extrude_depth((1, 0, 1), point)
assert point.almost_equal((100, 100, 0), 0.1)
