def test_line_interpolate_point_empty(geom, normalized):
# These geometries segfault in some versions of GEOS (in 3.8.0, still
# some of them segfault). Instead, we patched this to return POINT EMPTY.
# This matches GEOS 3.8.0 behavior on simple empty geometries.
assert_geometries_equal(
shapely.line_interpolate_point(geom, 0.2, normalized=normalized),
empty_point)
def test_line_interpolate_point_geom_array():
actual = shapely.line_interpolate_point(
[line_string, linear_ring, multi_line_string], -1)
assert_geometries_equal(actual[0], shapely.Geometry("POINT (1 0)"))
assert_geometries_equal(actual[1], shapely.Geometry("POINT (0 1)"))
assert_geometries_equal(actual[2],
shapely.Geometry("POINT (0.5528 1.1056)"),
tolerance=0.001)
def interpolate(self, distance, normalized=False):
"""Return a point at the specified distance along a linear geometry
Negative length values are taken as measured in the reverse
direction from the end of the geometry. Out-of-range index
values are handled by clamping them to the valid range of values.
If the normalized arg is True, the distance will be interpreted as a
fraction of the geometry's length.
"""
return shapely.line_interpolate_point(self,
distance,
normalized=normalized)
def test_line_interpolate_point_nan():
assert shapely.line_interpolate_point(line_string, np.nan) is None
def test_line_interpolate_point_none():
assert shapely.line_interpolate_point(None, 0.2) is None
def test_line_interpolate_point_invalid_type(geom, normalized):
with pytest.raises(TypeError):
assert shapely.line_interpolate_point(geom, 0.2, normalized=normalized)
def test_line_interpolate_point_float_array():
actual = shapely.line_interpolate_point(line_string, [0.2, 1.5, -0.2])
assert_geometries_equal(actual[0], shapely.Geometry("POINT (0.2 0)"))
assert_geometries_equal(actual[1], shapely.Geometry("POINT (1 0.5)"))
assert_geometries_equal(actual[2], shapely.Geometry("POINT (1 0.8)"))
def test_line_interpolate_point_geom_array_normalized():
actual = shapely.line_interpolate_point(
[line_string, linear_ring, multi_line_string], 1, normalized=True)
assert_geometries_equal(actual[0], shapely.Geometry("POINT (1 1)"))
assert_geometries_equal(actual[1], shapely.Geometry("POINT (0 0)"))
assert_geometries_equal(actual[2], shapely.Geometry("POINT (1 2)"))
