Thorsten Froehlich <tho### [at] trfde> wrote:
: It actually would increase parse time.

  Then use a trick sometimes used in C/C++. Instead of:

#include "whatever"

do:

#ifndef _WHATEVER_INC_
  #include "whatever"
  #declare _WHATEVER_INC_ = yes;
#end

  As this is done just inside a standard include, the user doesn't have to
worry about it.

-- 
#macro M(A,N,D,L)plane{-z,-9pigment{mandel L*9translate N color_map{[0rgb x]
[1rgb 9]}scale<D,D*3D>*1e3}rotate y*A*8}#end M(-3<1.206434.28623>70,7)M(
-1<.7438.1795>1,20)M(1<.77595.13699>30,20)M(3<.75923.07145>80,99)// - Warp -

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