53 lines
1.3 KiB
Python
53 lines
1.3 KiB
Python
from ._pnpoly import _grid_points_in_poly, _points_in_poly
|
|
|
|
|
|
def grid_points_in_poly(shape, verts):
|
|
"""Test whether points on a specified grid are inside a polygon.
|
|
|
|
For each ``(r, c)`` coordinate on a grid, i.e. ``(0, 0)``, ``(0, 1)`` etc.,
|
|
test whether that point lies inside a polygon.
|
|
|
|
Parameters
|
|
----------
|
|
shape : tuple (M, N)
|
|
Shape of the grid.
|
|
verts : (V, 2) array
|
|
Specify the V vertices of the polygon, sorted either clockwise
|
|
or anti-clockwise. The first point may (but does not need to be)
|
|
duplicated.
|
|
|
|
See Also
|
|
--------
|
|
points_in_poly
|
|
|
|
Returns
|
|
-------
|
|
mask : (M, N) ndarray of bool
|
|
True where the grid falls inside the polygon.
|
|
|
|
"""
|
|
return _grid_points_in_poly(shape, verts)
|
|
|
|
|
|
def points_in_poly(points, verts):
|
|
"""Test whether points lie inside a polygon.
|
|
|
|
Parameters
|
|
----------
|
|
points : (N, 2) array
|
|
Input points, ``(x, y)``.
|
|
verts : (M, 2) array
|
|
Vertices of the polygon, sorted either clockwise or anti-clockwise.
|
|
The first point may (but does not need to be) duplicated.
|
|
|
|
See Also
|
|
--------
|
|
grid_points_in_poly
|
|
|
|
Returns
|
|
-------
|
|
mask : (N,) array of bool
|
|
True if corresponding point is inside the polygon.
|
|
|
|
"""
|
|
return _points_in_poly(points, verts)
|