Ex. I have an image, let's say 100x100 pixels with some shape on it. And a set of straight lines that are passing through origin located at some point of image, for example origin located at point (50, 50). Number of lines determined by step - angle. If step = 15 degrees, then we have 180 / 15 lines. I want to determine points of interesection in efficient way, but all that I came up for now is printing a line on matrix and check for non-zero elements if they overlap non-zero elements of a shape(and check for diagonal connectivity).