On Fri, 23 May 2003 03:08:20 -0400, simian wrote:

> On Tue, 20 Jan 2009 07:50:08 -0500, cc wrote:
> 
>> I'm new to ng posting, so let me know if i screw something up.  :)
>> 
>> Long background description of the project.  If interested read it :)
>> otherwise I have a math question at the bottom.
>> 
>> I've been working on a system for scripting car-motion.  It's
>> geometry-based.  ... Based on the idea that when turning, the car will
>> revolve around some point which is located at the intersection of where
>> the normals (if extended) of all four wheels interrsect.  
> 
> 	If I were actually designing a simulation of car motion for car company
> and wanted to earn my keep I would certainly use as complex an approach
> as this so I could determine lateral strain on struts and tires. 
> 
> 	However just to povray it ... 
> 
>> ************************************************************************
>> 
>> In the spirit of clean mathematical models, I really want to do each
>> motion segment in one step using calculus.
> 
> ...
> 
>> If mathematica can't do it, is that a bad sign?  I threw a few things
>> into the online mathematica integrator. http://integrals.wolfram.com/
>> Unfortunately it wasn't able to do them.
>> 
>> Help?  Suggestions?   Is there a way to approximate these integrals w/o
>> iteration?
> 
> 	... is this not a bit on the side of overkill? Assume the front tires
> turn exactly in sync and the rear wheels do not affect the resultant
> motion and the problem is down to rather simple analytic geometry. 
> 
> 	I don't mean to try to talk you out of an interesting problem but I
> doubt anything you are talking about is going to improve the realism of
> the motion in the least.

A little while ago, I checked the date on the first replies to this thread 
and IIRC, the actual date was 1998! Looks like CC has created an effective 
P.B.A-U weed by setting his clock ahead a decade... -_- No offense simian, 
I did the very same thing a little while ago. ;-)

-- 
light_source#macro G(E)sphere{z+E*y*5e-3.04rotate-z*E*6pigment{rgbt#end{
20*y-10#local n=162;1}#while(n)#local n=n-.3;G(n)x}}G(-n).7}}#end//GregE

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