[vos-d] thought problem 1: physics

[Peter Amstutz]

Well, I assume this is a trick question.  Obviously it *should* do the 
same thing, but because of tiny changes in floating point precision, 
that isn't guaranteed, and the further you go the less likely it is to 
produce the same results.  Do I get a cookie?

On Fri, Feb 02, 2007 at 09:26:43AM +0900, chris wrote:
> This is in response to Reed's question in earlier thread.
> 
> Thought problem 1: physics
> 
> Suppose I am going to do a rigid body simulation. I put one box (box1)
> on a plane, at the origin and hold another box (box2) suspended a
> meter above the plane nearby. I release box2 at time t=20 and it
> bounces, perhaps collides with box1 then eventually comes to rest. I
> snap an image of the rest state of the sim.
> 
> Now I repeat the entire sim after first shifting everything (boxes and
> plane) by 10m. The boxes and plane are in exactly the same relative
> position as before. I drop box2 at t=20, let it bounce and snap an
> image of the sim when it is at rest.
> 
> Question: will the two images of the two experiments show box2 in the
> same rest position relative to box1?
> 
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-- 
[   Peter Amstutz  ][ tetron at interreality.org ][ peter.amstutz at gdit.com ]
[Lead Programmer][Interreality Project][Virtual Reality for the Internet]
[ VOS: Next Generation Internet Communication][ http://interreality.org ]
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