Mark Hanford wrote:

> Length conservation is still handled in a bodge-it'n'leg-it fashion, I'm
> planning to just stretch the control points a bit depending on the angle of
> the bend.  (At the moment, it does nothing, as you can see from the image -
> no loops)

Try http://news.povray.org/povray.binaries.scene-files/20553/ for a string
simulation. I am working on some string macros myself that will do what you want,
but the code is far from release. I'll get an anim together and post it later in
the week if you like.

MJL
--
light_source{9*(y#macro A(H,B,R,T)prism{0,1H+4,0u*9,9v*9,0#local I=1;#while(I<H)
#local V=asc(substr(B,I,1))-33;<div(V,10)mod(V,10)>#local I=I+1;#end pigment{rgb
y}rotate-<90,R>translate-T}#end-z)rgb 9}A(14",6;MWmhryXN3,"60<15,0,8>)box{-99(x+
z)*99pigment{rgb 1}}fog{distance 11}camera{location(y-z)*25look_at 0}A(8"6hiAG=6
"-60x*-10)A(16"/.@VZno=<PLA89/"0x*5) // MJL

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