Path: utzoo!mnetor!uunet!lll-winken!lll-lcc!ames!hao!noao!arizona!naucse!rrr From: rrr@naucse.UUCP (Bob Rose ) Newsgroups: comp.graphics Subject: Re: COMPLICATED PROBLEM (point inside poly AGAIN!) Message-ID: <590@naucse.UUCP> Date: 1 Mar 88 18:40:53 GMT References: <971@ut-emx.UUCP> <20533@amdcad.AMD.COM> <7626@pur-ee.UUCP> <3320@bloom-beacon.MIT.EDU> Organization: Northern Arizona University, Flagstaff, AZ Lines: 17 Keywords: READ THIS ONLY IF YOUR IQ >>125 Summary: lets see it In article <3320@bloom-beacon.MIT.EDU>, tada@athena.mit.edu (Michael Zehr) writes: >> [Someones algo for finding if a point is inside a poly] > The method I use in some graphics programs requires a compare and an > xor for each edge of the polygon, and 2 multiplies (total, not for each > edge). > michael j zehr Sounds interesting. Lets here about the algorithm, it does sound rather specific though, like xor is not that common in (none bit mask) graphic routines. -bob Robert R. Rose Northern Arizona University, Box 15600 Flagstaff, AZ 86011 .....!ihnp4!arizona!naucse!rrr