Yes, yes, you're right. I realized that a few minuter after having 
posted the code. I have to correct it in p.t.s.f.

In fact, I'm using  - Min - <(Max.x-Min.x), 0, (Max.z-Min.z)>/2 to have 
the bottom of the object lying on the ground in order to avoid some 
collisions.

Nicolas


Marc Champagne wrote:
>     	
> It did notice...
> 
> If you were trying to center (to the origin) the passed object
> to your tiled_sphere macro, I believe this should of been the
> formula: -Min-((Max-Min)/2)
> 
> Just -(Max-Min)/2 was only moving it closer to the origin by
> half the objects size.
> 
>

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