Path: chuka.playstation.co.uk!news
From: "Peter Dollochan" <Peter.Dollochan@btinternet.com>
Newsgroups: scea.yaroze.programming.3d_graphics
Subject: Re: 3D racetracks
Date: 18 Jun 1998 10:13:21 GMT
Organization: PlayStation Net Yaroze (SCEE)
Lines: 36
Message-ID: <01bd9aa1$70d71d40$512b63c3@default>
References: <01bd9975$08f8fa40$59b5dccf@mannynaj>
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Hi Manny,
If you have SCEE access check out 
http://www.netyaroze-europe.com/~peterd/
if this is anything like what you are trying to do mail me :)

Pete.

Manny Najera <mannyn@ix.netcom.com> wrote in article
<01bd9975$08f8fa40$59b5dccf@mannynaj>...
> I asked this question about a year ago, but I think now I'm in a better
> position to understand the answer:  How do you go about creating a 3D
> racetrack?
> 
> After drawing up some sort of 3D track, you have to include the collision
> detection between the car and the road.  A SCEE member created a track
that
> lied entirely in one plane, and that track was divided into many
> rectangular sections.  In his program, he checks to see which rectangle
the
> car lies in, then does the appropriate adjustments.  Do other racing
games
> (Hover Racing in particular) use this method, or a modified version
> thereof?
> 
> Here is my thinking:  After the track is drawn up, or before, a 3D model
> consisting of nothing but 4-sided panels is created out of the road part
of
> the track.  For each of the four tires (the only part of the car touching
> the road) the program finds out which panel they're touching, and where
> inside the panel they are touching.  With this information, a calculation
> of the tire's height is performed.  The locations of the four tires then
> determines the orientation of the car.  The four tires also form a
> convinent box for collisions with other cars.  Does this seem feasible?
> 
> Manny Najera
>