16:13:10jackdanielwhile somewhat hard for the last two, we already know how to do that for polygons
16:14:35jackdanieleither way, here's a draft of my idea for organizing regions so it is closed algebra: https://gist.github.com/dkochmanski/28c4b9308c87b1800ab3a83fff5f82ba
16:14:46jackdanielI'd love to hear comments if anyone cares ,)
16:14:54scymtymlast time i tried random testing with regions i had to stop because there were too many problems
16:37:28yitzijackdaniel: You've got a typo with region-intersects-regoin-p