goal will be to calculate the entire union path of an eraser stroke by finding it's outline path's self intersections, and building the union from that, instead of from unioning separating segments of the stroke together.
[x] calculate self intersections
[x] calculate segments of a path based on those intersections
goal will be to calculate the entire union path of an eraser stroke by finding it's outline path's self intersections, and building the union from that, instead of from unioning separating segments of the stroke together.