John D. Gwinner wrote:
> 
> Hello:
> 
>   I'm trying to raytrace an image of Steve Jackon's "Ogre", including all
> the myriad tank treads.  I'm trying to figure out the best way to
> (programatically) build these tank treads.
> 
>   Basically, it's sort of like Rob Antonishen's chain generator,
> http://www.geocities.com/SoHo/7865/, but with bogey's and wheels.  I figure
> I could probably get by with fiting a tank tread to a path as well.  I'd
> like to be able to make this programatic so that it could be animated.  I'd
> guess that actually animating a tank's suspension moving over terrain would
> be very difficult, but it's tempting.
> 
>   Nice, shiny steel robot treads moving up some stairs would be a very
> impressive effect as well; I'd think this could be a usefull utility.  I'd
> use some bump maps but modeling individual treads would be usefull for
> animation and side shots.
> 
>   Any suggestions?  (I've got a bad feeling I'd have to write a program to
> do this <G>)
> 
>         == John ==
> 

Hi John! Have a look at Chris Colefax's spline and chain include files.
They might just be the kind of files you've been looking for:

http://www.geocities.com/SiliconValley/Lakes/1434

I hope to see your pic at p.b.i!

Marc
-- 
Marc Schimmler

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