Path: chuka.playstation.co.uk!news From: Developer Support Newsgroups: scee.yaroze.programming.3d_graphics Subject: Re: u,v co-ordinates Date: Tue, 27 May 1997 11:50:23 +0100 Organization: Sony Computer Entertainment Europe Lines: 29 Message-ID: <338ABC6F.7D20@interactive.sony.com> References: <338B1B07.515B@cobradev.demon.co.uk> Reply-To: N/A-Use-Newsgroup NNTP-Posting-Host: 194.203.13.10 Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 3.01 (Win95; I) colin adams wrote: > > Could someone Explain u,v co-ordinates? specifically in > Relation to Mapping Tims onto Quads? > If someone has already asked this Question A pointer to the > postings Will Do. (FAQ Available?) > > BTW I am doing it via *.mat files utill RsdTool Arrives. > > Thanks in Advance > > -- > Cobra The u,v coordinates are the positions in the texture that are to be mapped to the vertices of a face in the polygon. In the mat file for each of the polygons as described in the ply file there is the texture information. The exact fields are described in the RSD document, available on this site. The u,v coordinates will be pixel values within the texture (not screen coordinates). The order of the u,v's is top left, top right, bottom left and bottom right. You should be able to use the RSDTool beta (also on this site) to do this, the latest one crashes a lot less often. Hope this is enough info. If not can we have more info on whats going wrong. Stuart