code: def generateDistanceMatrix(width, height):
  	
  	
  	# Determine the coordinates of the exact centre of the window
  	originX = width / 2
  	originY = height / 2
  	
  	# Generate the distance matrix
  	distances = zerosFactory((height,width), dtype=np.float)
  	for index, val in np.ndenumerate(distances):
  		y,x = index
  		distances[(y,x)] = math.sqrt( math.pow(x - originX, 2) + math.pow(y - originY, 2) )
  	
  	return distances
docs: Generates a matrix specifying the distance of each point in a window to its centre.