Maybe it will be usefull:

==================================
#declare Helice = union      {
 #declare myCount = 0;

#while(myCount < 50)
 object  {
 Your_Object
  translate <0,myCount/1.2,0>
  rotate <0,myCount*9.5,0>
  }
#declare myCount = myCount + 1;
#end  };

object  { Helice }
object  { Helice rotate <0,90,0> translate <150, -60, 0>}
======================================

Best regards,
Oleguer



news:web.417b13026e9252d7505508630@news.povray.org...
> I've been trying to create a strand of DNA using an isosurface. However, I
> keep having trouble creating the double helix using the function f_helix1
> found in functions.inc
>
> Could anybody give me an example double helix for me to start with? It'd
be
> a big help.
>
>

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