Path: chuka.playstation.co.uk!news From: sosman@terratron.com (Steven Osman) Newsgroups: scee.yaroze.programming.3d_graphics Subject: Re: Getting Y coord from Plane and X,Z coords Date: Sat, 15 Jan 2000 21:16:50 GMT Organization: PlayStation Net Yaroze (SCEE) Lines: 25 Message-ID: <3883e37c.3289377294@news.playstation.co.uk> References: <387FB920.1F1201B7@mcneish.freeserve.co.uk> NNTP-Posting-Host: 209.27.57.69 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Newsreader: Forte Agent 1.5/32.452 I think that staring with the coordinates of the points on the plane you should be able to compute the formula of the plane. Then it's just as simple as plugging in what you know, to get what you don't. If you don't know how to derive the equation of a plane, I can look it up for you (I think I can at least). Steven On Sat, 15 Jan 2000 00:02:40 +0000, Bruce McNeish wrote: >Hi all, > >I simple puzzel for you boffins to contimplate. > >I have a polygon which I know the coords of the corners(A,B,C,D). > >If I have a point that I know the X and Z coords, how do I work out the >Y coord of this point? > >Cheers all, > >Bruce McNeish