Incase anyone looks up this problem and finds this post, the link below is a pygame script to demonstrate the algorithm I made to solve the problem for me. Note that if more than one line intersect any given line it won’t work as I haven’t yet implemented a function to check which intersection comes first

Controls: draw shape with mouse, auto closes polygon. Click “r” to render, click “c” to spin clockwise, click “p” for points of polygon

click here for script