Path: chuka.playstation.co.uk!news
From: "Mike Hatfield" <mhatfield@ridgeway-sys.com>
Newsgroups: scee.yaroze.programming.3d_graphics
Subject: Re: Interesting Game Physics
Date: Tue, 15 Jun 1999 09:46:00 +0100
Organization: PlayStation Net Yaroze (SCEE)
Lines: 34
Message-ID: <7k540k$75r4@chuka.playstation.co.uk>
References: <3763E7F7.2A355F0C@which.net> <7k2hpr$hn712@chuka.playstation.co.uk> <376591f4.1188225@www.netyaroze-europe.com>
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Barry & Robert Swan wrote in message
<376591f4.1188225@www.netyaroze-europe.com>...
>s = ut + 0.5(at^2)
>v^2 = u^2 + 2as
>v = u + at
>
>reason I mention those was cos of a few of us trying to solve a simple
>sounding problem at work, which messed a few of us up before we 'saw
>the light' (or i did at any rate)
>
>u = fixed value
>v = 0
>s = fixed value
>t = fixed value
>
>find 'a' such that an object starting at velocity'u' will come to a
>deat halt 'v=0' over a certain distance 's' and a certain time 't'
>while exhibiting a constant retardation.
>
>Sounds simple - sibstitute away. Answers given tomorrow or day after
>for those of you not spotting the simple solution...!


There's actually too much information here! You don't need 's' and 't' in
order to find 'a'...

How about:
-a = u/t     being the simplest solution?
or -a = u^2 / 2s  if you've got distance rather than time?


Mike