Reactor <rea### [at] hotmailcom> wrote:
>  sphere{ <0, rad*sqrt(8/3), 0>,  rad   } // top one

> // the other spheres are laid out as corners of an equilateral triangle.
> // all start at the +z distance away from the center of the triangle (the
> origin)
> // the spheres are then rotated into place
>  sphere{ <0, 0, rad*2/3*sqrt(3)>,  rad   rotate <0,   0,0> }
>  sphere{ <0, 0, rad*2/3*sqrt(3)>,  rad   rotate <0, 120,0> }
>  sphere{ <0, 0, rad*2/3*sqrt(3)>,  rad   rotate <0,-120,0> }

  Can you explain in more detail how you came up with those magical
formulae?

-- 
                                                          - Warp

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