def test_poly_clip():
x = [0, 1, 2, 1]
y = [0, -1, 0, 1]
yc, xc = polygon_clip(y, x, 0, 0, 1, 1)
assert_equal(polygon_area(yc, xc), 0.5)
x = [-1, 1.5, 1.5, -1]
y = [.5, 0.5, 1.5, 1.5]
yc, xc = polygon_clip(y, x, 0, 0, 1, 1)
assert_equal(polygon_area(yc, xc), 0.5)
def test_poly_clip():
x = [0, 1, 2, 1]
y = [0, -1, 0, 1]
yc, xc = polygon_clip(y, x, 0, 0, 1, 1)
assert_equal(polygon_area(yc, xc), 0.5)
x = [-1, 1.5, 1.5, -1]
y = [.5, 0.5, 1.5, 1.5]
yc, xc = polygon_clip(y, x, 0, 0, 1, 1)
assert_equal(polygon_area(yc, xc), 0.5)
def test_polygon_area():
x = [0, 0, 1, 1]
y = [0, 1, 1, 0]
assert_almost_equal(polygon_area(y, x), 1)
x = [0, 0, 1]
y = [0, 1, 1]
assert_almost_equal(polygon_area(y, x), 0.5)
x = [0, 0, 0.5, 1, 1, 0.5]
y = [0, 1, 0.5, 1, 0, 0.5]
assert_almost_equal(polygon_area(y, x), 0.5)
def test_polygon_area():
x = [0, 0, 1, 1]
y = [0, 1, 1, 0]
assert_almost_equal(polygon_area(y, x), 1)
x = [0, 0, 1]
y = [0, 1, 1]
assert_almost_equal(polygon_area(y, x), 0.5)
x = [0, 0, 0.5, 1, 1, 0.5]
y = [0, 1, 0.5, 1, 0, 0.5]
assert_almost_equal(polygon_area(y, x), 0.5)
