Mahalis wrote:
> 
> How would I rotate a sphere so that a certain point on the sphere would
> point at location<x,y,z>?

Mahalis wrote:
> 
> How would I rotate a sphere so that a certain point on the sphere would
> point at location<x,y,z>?

You can find the code for my ReorientMatrix() macro here:

news://news.povray.org/3B8ECB7D.571A4BE2%40hotmail.com
(In my reply to Dave Dunn's "Vexing Vector Problem" 31. Aug.)

And then you may write something like this:

#declare YourSphere = ... // You specify
#declare vPointOnSphere = ... // You specify
#declare vPointAtLocation = <LocX, LocY, LocZ>;

object {
  YourSphere
  ReorientMatrix(vPointOnSphere, vPointAtLocation)
}


Hopefully this will do the trick for you.

(My ReorientMatrix() macro does the same as 
John Van Sickle's Reorient() macro, but with
a slightly different method.)


Tor Olav

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