Thanks, great work. Just one comment:

  #macro xyz(px,py,pz)
    #local vx = vrotate(vrotate(vrotate(x,px*x),py*y),pz*z);
    #local vy = vrotate(vrotate(vrotate(y,px*x),py*y),pz*z);
    #local vz = vrotate(vrotate(vrotate(z,px*x),py*y),pz*z);
    getrotation(vx,vy,vz)
  #end

could be done somewhat shorter like this

  #macro xyz(px,py,pz)
    <px,py,pz>
  #end

;-)
I imagine this is also faster, especially when used a lot.

    Frits van Bommel

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