Path: chuka.playstation.co.uk!news
From: Ian Thompson <A2595042@infotrade.co.uk>
Newsgroups: scea.yaroze.programming.3d_graphics
Subject: Re: Calculating RSD Normals
Date: Tue, 01 Sep 1998 10:24:38 +0100
Organization: The PC Shop
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References: <3551A622.6DF487E9@clara.net> <35E8D37C.98E372C5@microworld.com> <35E9D4F4.D88AE7BD@hinge.mistral.co.uk>
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Craig Graham wrote:

> Austin wrote:
>
> > Ian,
> >     I would look at the libxplod libraries from survival...those give a whole list of diff type of prims as well as an excellent reference for what
> > you are doing. I would
> > also try to get ahold of Craig Grahm.. he successfully converted asc in rsdanim program... also look on the codeworks site for there reference on
> > tmd...I hope
> > this gives you some places to look at :)
>
> Heh heh heh. Any of the select few who's seen my source to RsdANIM want tosnigger about that as well? (there's a whole lot of bodging going on in
> there).
>
> Anyway, I believe Ian sorted it out in the end....
>
> > Austin
>
> Craig.


 Yep!

And just in case this can help anybody else's understanding;

 for (i=0;i<num_polys;i++)
 {
  x1=base_pts[base_polys[(i*3)]*3];   y1=base_pts[base_polys[(i*3)]*3+1];
z1=base_pts[base_polys[(i*3)]*3+2];
  x2=base_pts[base_polys[(i*3)+1]*3]; y2=base_pts[base_polys[(i*3)+1]*3+1];
z2=base_pts[base_polys[(i*3)+1]*3+2];
  x3=base_pts[base_polys[(i*3)+2]*3]; y3=base_pts[base_polys[(i*3)+2]*3+1];
z3=base_pts[base_polys[(i*3)+2]*3+2];

  nx = ((y2-y1)*(z3-z1))-((z2-z1)*(y3-y1));
  ny = ((z2-z1)*(x3-x1))-((x2-x1)*(z3-z1));
  nz = ((x2-x1)*(y3-y1))-((y2-y1)*(x3-x1));

  length = sqrt((nx*nx)+(ny*ny)+(nz*nz));

  if (length!=0)
  {
  nx=nx/length;
  ny=ny/length;
  nz=nz/length;
  }

  base_norms[i*3]=nx;
  base_norms[(i*3)+1]=ny;
  base_norms[(i*3)+2]=nz;
 }

is how it's done.

Thanks to all who gave me a hand.

Ian