LibraryMan wrote:
> 
> Hi,
> I'm trying to do a prism with a dodecagon (? -- anyway, polygon with 12
> equal sides ) face and instead of trying to figure out the exact vectors
> of the points, I wanted to do something like specifying every 4th
> vector, then rotating the in-betweens around the y-axis, like this:
> 
> #declare v_01 =  <0.5, 0> ;
> #declare v_02 =  <0.5, 0> rotate y*30 ;
> [...]

Bob's suggestion is surely the best for your purpose but
rotating/transforming vectors can be done with
'vrotate()'/'vtransform()'.    See the documentation for details.

Christoph

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