Introduction - If you have any usage issues, please Google them yourself
Polygon clipping process: it is more commonly used method of cutting: Sutherland-Hodgman algorithm. This procedure of cutting the order for the left, bottom, right, top, then the cutting is carried out: the original clipping polygon to be clipped polygon as input the left side of the rectangular cutting, then cutting output cut as the bottom of the input polygon, ... ... , and so on, until the last end side of the rectangular cut above.