# Last edited on 2021-07-31 15:03:58 by jstolfi
  
def sampling_2d_grid_choose(xmin,xmax,nx, ymin,ymax,ny):
  # Generates a uniform grid of sampling points in the rectangle
  # {D = {xmin _ xmax} × [ymin _ ymax]}, with {nx} points in {v}
  # and {ny} in {y}.
  #
  # Specifically, divides {D} into a grid of {nx} by {ny}
  # rectangles and puts a semapling point in the center of each rectangle.

  ns = nx*ny; # Total number of samples.
  s = []; # The sampling points.
  for ix in range(nx):
    x = 2*(ix + 0.5)/nx - 1;
    for iy in range(ny):
      y = 2*(iy + 0.5)/ny - 1;
      s.append((x,y));
  return s
  # ----------------------------------------------------------------------