Le 03/01/2012 20:55, Marina nous fit lire :
> I am trying to create the symbol to show circular polarization for a physics
> diagram so I need an arrow in the shape of a circle. However, the only way I can
> currently do it is to just make a circle and add a cone in one section... what I
> want is a slight gap between the head and tail of the arrow so it's not all just
> one continuous object. I haven't figured out how to use the features of POV-Ray
> that let you 'take away' from objects. Could anyone show me what the easiest way
> to go about this would be? At least point me in the right direction? I'd really
> appreciate it.
> Thanks! :)
> 
> 
Hello,

try to thing in 3D... your circle can be a torus.
CSG is what you need.

something along:

union
{
  cone { 3*z,1,3*z+3*x,0 }
  difference {
    torus { 3,0.2 }
    box { <0,-1,0>,<4,1,4> }
  }
  // apply texture as needed
}

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