def test_distance_away2():
# Towards a smarter Curve::distance_away(), which understands
# piecewise linear geometry
island = np.array([[200, 200], [600, 200], [200, 600]])
curve = front.Curve(island)
anchor_f = 919.3
signed_distance = 50.0
res = curve.distance_away(anchor_f, signed_distance)
assert res[0] > anchor_f
anchor_pnt = curve(anchor_f)
rel_err = np.abs(utils.dist(anchor_pnt - res[1]) -
abs(signed_distance)) / abs(signed_distance)
assert np.abs(rel_err) <= 0.05
anchor_f = 440
signed_distance = -50.0
res = curve.distance_away(anchor_f, signed_distance)
anchor_pnt = curve(anchor_f)
rel_err = np.abs(utils.dist(anchor_pnt - res[1]) -
abs(signed_distance)) / abs(signed_distance)
assert res[0] < anchor_f
assert np.abs(rel_err) <= 0.05
def hex_curve():
hexagon = np.array( [[0,11],
[10,0],
[30,0],
[40,9],
[30,20],
[10,20]] )
return front.Curve(hexagon)
def test_distance3():
# Case where the return point is on the same segment as it starts
curve = front.Curve(np.array([[0, 0], [1000, 0], [1000, 1000], [0, 1000]]),
closed=True)
res = curve.distance_away(3308.90, 50.0)
res = curve.distance_away(3308.90, -50.0)