Path: chuka.playstation.co.uk!news From: Craig Graham Newsgroups: scee.yaroze.programming.3d_graphics Subject: Re: more dynamic tmd problems Date: Tue, 12 May 1998 14:40:13 +0100 Organization: Intelligent Research Lines: 88 Message-ID: <3558513D.3A952526@hinge.mistral.co.uk> References: <355849D2.2F3CFB4C@altavista.net> NNTP-Posting-Host: 194.131.235.3 Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="------------68775662E190900B914CF10F" X-Mailer: Mozilla 4.03 [en] (Win95; I) --------------68775662E190900B914CF10F Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Adrian Scoffield wrote: > double sided polygons, but i cannot get 4 sided flat gourad shaded > gradation > primitives to work either (although 3 sided does), is this the same > problem? This'll be the funny vertex numbering problem. As the PSX split's quad's into two triangles to render, the vertex's on a quad are Z numbered.... 0-1 | | 2-3 as the triangles will be rendered: 0---1 1 | / /| | / / | |/ / | 2 2---3 > On a different note, when i create gourad textured quads the texture > uv mapping goes screwy - about a quarter of the quad is textured but the > > rest is video memory rubbish. > > any ideas? Texture page alignment? Craig. --------------68775662E190900B914CF10F Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Adrian Scoffield wrote:

double sided polygons, but i cannot get 4 sided flat gourad shaded
gradation
primitives to work either (although 3 sided does), is this the same
problem?

This'll be the funny vertex numbering problem.

As the PSX split's quad's into two triangles to render, the vertex's on a quad
are Z numbered....

    0-1
    | |
    2-3

as the triangles will be rendered:

    0---1     1
    | /     /|
    | /     / |
    |/     / |
        2           2---3

On a different note, when i create gourad textured quads the texture
uv mapping goes screwy - about a quarter of the quad is textured but the
rest is video memory rubbish.
any ideas?

Texture page alignment?

Craig.
--------------68775662E190900B914CF10F--