In article <3A0FCAB9.D1347F95@online.no>, Tor Olav Kristensen 
<tor### [at] onlineno> wrote:

> I wanted make some cylinders that were "bent" according to a random 
> pattern by using an iso- surface.
> I haven't succeeded doing this yet, but here's an intermediate 
> result. I'm not sure at all if it's possible to do what I want with 
> an iso- surface. (But I'm trying.)

It is very possible, and easy. Just use the pattern to adjust the xyz 
values fed to your function...the easiest way is to declare your 
function before you use it:

#declare Cyl = function {1 - sqrt(sqr(x) + sqr(z))}
#declare PatX = function {...pigment function for x displacement...}
#declare PatY = function {...pigment function for y displacement...}
#declare PatZ = function {...pigment function for z displacement...}

isosurface {
    function {Cyl(x-PatX(x,y,z), y-PatY(x,y,z), z-PatZ(x,y,z))}
    ...
}

This will do an effect similar to the type 0 displace warp...which leads 
to another way of doing it:
#declare BentCyl = 
function {
    pigment {function {1 - sqrt(sqr(x) + sqr(z))}
        warp {displace {pigment...}}
    }
}

isosurface {
    function {Cyl(x, y, z)}
    ...
}

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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