Jack Twilley wrote:

 > Help?

Hello Jack.

Here's a simple way using an isosurface and a declared pattern to make 
triangular threads:

#declare threads=
  function{
   pattern{ spiral1 1 rotate x*90 triangle_wave}
  }

isosurface {
  function{
   // cylinder, with a radius of 5 units
   sqrt(x*x+z*z)-5
   // threads
   +threads(x,y,z)/4
  }
  accuracy .01
  evaluate 5, 1.2, 0.95
  contained_by{ box{<-5,-10,-5>,<5,10,5>} }
  pigment{rgb .1}
  finish{reflection .9 specular 1 roughness .05}
}

If I think of anything else, like a faster method, I'll post more code.

-Samuel Benge

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