On Tue, 21 Aug 2001 16:51:15 -0400, Mark M. Wilson wrote:
>My only problem with that is that with only two points used, I can think
>of at least THREE possible circles

Actually, with just two points you can choose a center anywhere on the 
line that's equally distant from both points and draw a circle that goes 
through both points.  Thus, there are infinite solutions to the two-point
problem.

-- 
plane{-z,-3normal{crackle scale.2#local a=5;#while(a)warp{repeat x flip x}rotate
z*60#local a=a-1;#end translate-9*x}pigment{rgb 1}}light_source{-9red 1rotate 60
*z}light_source{-9rgb y rotate-z*60}light_source{9-z*18rgb z}text{ttf"arial.ttf"
"RP".01,0translate-<.6,.4,.02>pigment{bozo}}light_source{-z*3rgb-.2}//Ron Parker

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