Sorry, Jamie --
I forgot to specify in my original question that the three points must
NOT be colinear, but SHOULD be coplanar (and anyone who knows geometry
knows that given any three points in 3D space, exactly one plane can
contain all three.)

I do in fact want to find the center point of the circle whose
circumference passes through the OTHER three points. :-)

--Mark

Jamie Davison wrote:
> 
> I have a question.  And please bear in mind that my maths is not the
> best.
> 
> How do you get a solution if all three points are in a perfectly straight
> line, e.g.:
> <0,0,0>, <1,0,0>, <2,0,0>
> 
> Apart from using the limited accuracy of numerical values in POV, how do
> you draw a circle such that its circumference passes through all three
> points?
> 
> Or am I misunderstaning the original question?
> 
> Bye for now,
>      Jamie.

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