def get_cpp_triangulation(self):
# Return the underlying C++ Triangulation object, creating it
# if necessary.
if self._cpp_triangulation is None:
self._cpp_triangulation = _tri.Triangulation(
self.x, self.y, self.triangles, self.mask, self._edges,
self._neighbors)
return self._cpp_triangulation
def get_cpp_triangulation(self):
"""
Return the underlying C++ Triangulation object, creating it
if necessary.
"""
if self._cpp_triangulation is None:
self._cpp_triangulation = _tri.Triangulation(
self.x, self.y, self.triangles, self.mask, self._edges,
self._neighbors, not self.is_delaunay)
return self._cpp_triangulation
def test_internal_cpp_api():
# Following github issue 8197.
import matplotlib._tri as _tri
# C++ Triangulation.
with pytest.raises(TypeError) as excinfo:
triang = _tri.Triangulation()
excinfo.match(r'function takes exactly 7 arguments \(0 given\)')
with pytest.raises(ValueError) as excinfo:
triang = _tri.Triangulation([], [1], [[]], None, None, None, False)
excinfo.match(r'x and y must be 1D arrays of the same length')
x = [0, 1, 1]
y = [0, 0, 1]
with pytest.raises(ValueError) as excinfo:
triang = _tri.Triangulation(x, y, [[0, 1]], None, None, None, False)
excinfo.match(r'triangles must be a 2D array of shape \(\?,3\)')
tris = [[0, 1, 2]]
with pytest.raises(ValueError) as excinfo:
triang = _tri.Triangulation(x, y, tris, [0, 1], None, None, False)
excinfo.match(r'mask must be a 1D array with the same length as the ' +
r'triangles array')
with pytest.raises(ValueError) as excinfo:
triang = _tri.Triangulation(x, y, tris, None, [[1]], None, False)
excinfo.match(r'edges must be a 2D array with shape \(\?,2\)')
with pytest.raises(ValueError) as excinfo:
triang = _tri.Triangulation(x, y, tris, None, None, [[-1]], False)
excinfo.match(r'neighbors must be a 2D array with the same shape as the ' +
r'triangles array')
triang = _tri.Triangulation(x, y, tris, None, None, None, False)
with pytest.raises(ValueError) as excinfo:
triang.calculate_plane_coefficients([])
excinfo.match(r'z array must have same length as triangulation x and y ' +
r'arrays')
with pytest.raises(ValueError) as excinfo:
triang.set_mask([0, 1])
excinfo.match(r'mask must be a 1D array with the same length as the ' +
r'triangles array')
# C++ TriContourGenerator.
with pytest.raises(TypeError) as excinfo:
tcg = _tri.TriContourGenerator()
excinfo.match(r'function takes exactly 2 arguments \(0 given\)')
with pytest.raises(ValueError) as excinfo:
tcg = _tri.TriContourGenerator(triang, [1])
excinfo.match(r'z must be a 1D array with the same length as the x and ' +
r'y arrays')
z = [0, 1, 2]
tcg = _tri.TriContourGenerator(triang, z)
with pytest.raises(ValueError) as excinfo:
tcg.create_filled_contour(1, 0)
excinfo.match(r'filled contour levels must be increasing')
# C++ TrapezoidMapTriFinder.
with pytest.raises(TypeError) as excinfo:
trifinder = _tri.TrapezoidMapTriFinder()
excinfo.match(r'function takes exactly 1 argument \(0 given\)')
trifinder = _tri.TrapezoidMapTriFinder(triang)
with pytest.raises(ValueError) as excinfo:
trifinder.find_many([0], [0, 1])
excinfo.match(r'x and y must be array_like with same shape')