def encloses_subpixels(self, x_min, x_max, y_min, y_max, nx, ny,
subpixels):
"""Return a float array giving the fraction of each pixel covered
by the aperture, using a sub-pixel sampling method.
Parameters
----------
x_min, x_max : float
x coordinates of outer edges of array
y_min, y_max : float
y coordinates of outer edges of array
nx, ny : int
dimension of array
subpixels : int
Returns
-------
overlap_area : `~numpy.ndarray` (float)
2-d array of overlapping fraction.
"""
from circular_overlap import circular_overlap_grid
return (circular_overlap_grid(x_min, x_max, y_min, y_max, nx, ny,
self.r_out, 0, subpixels) -
circular_overlap_grid(x_min, x_max, y_min, y_max, nx, ny,
self.r_in, 0, subpixels))
def encloses_exact(self, x_min, x_max, y_min, y_max, nx, ny):
"""
Return a float array giving the fraction of each pixel covered
by the aperture, using an exact calculation.
Parameters
----------
x_min, x_max : float
x coordinates of outer edges of array
y_min, y_max : float
y coordinates of outer edges of array
nx, ny : int
dimension of array
Returns
-------
overlap_area : `~numpy.ndarray` (float)
2-d array of overlapping fraction.
"""
from circular_overlap import circular_overlap_grid
return (circular_overlap_grid(x_min, x_max, y_min, y_max, nx, ny,
self.r_out, 1, 1) -
circular_overlap_grid(x_min, x_max, y_min, y_max, nx, ny,
self.r_in, 1, 1))
