click and drag to add lines press E to undo the last line press R to delete all lines use your mouse to move the light around to make shadows there are 2 ways it can draw - one being normal - the other being a visual to show what it's doing press D to switch between them
intersecting lines may not render perfectly go to https://forkphorus.github.io/app.html?id=380756070 for a higher resolution I originally took someone else's quick-sort algorithm so I made my own
