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Dave Matthews wrote:
> Tor Olav Kristensen <tor### [at] TOBEREMOVEDgmail com> wrote:
>> Here's the results of a little experiment I did today.
>>
>> Functions are used to distort heavily photos (shot with my mobile).
>> (The resulting pigments can can be used in textures.)
>>
>
> Very cool (and useful, I think!) I'm pretty sure I know how this is done,
> but could you post up a snippet of code, showing it, please?
Sure Dave - see source code below.
Tor Olav
// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
// Use of functions to distort image
// Tor Olav Kristensen, 21. May 2006
// http://subcube.com
// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
#version 3.6;
#include "functions.inc"
global_settings {
ambient_light color rgb <1, 1, 1>
// assumed_gamma 1.0
}
// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
#declare ImageFn =
function { pigment { image_map { "YourImage.png" } } }
#declare Ampl = 1.5;
#declare Freq = 1.0;
#declare NoiseFnX =
function { Ampl*(f_agate( 0 + Freq*x, Freq*y, z) - 0.5) }
#declare NoiseFnY =
function { Ampl*(f_agate(10 + Freq*x, Freq*y, z) - 0.5) }
#declare PigmentR =
pigment {
function {
ImageFn(x + NoiseFnX(x, y, z), y + NoiseFnY(x, y, z), z).red
}
color_map {
[ 0 color red 0 ]
[ 1 color red 3 ]
}
}
#declare PigmentG =
pigment {
function {
ImageFn(x + NoiseFnX(x, y, z), y + NoiseFnY(x, y, z), z).green
}
color_map {
[ 0 color green 0 ]
[ 1 color green 3 ]
}
}
#declare PigmentB =
pigment {
function {
ImageFn(x + NoiseFnX(x, y, z), y + NoiseFnY(x, y, z), z).blue
}
color_map {
[ 0 color blue 0 ]
[ 1 color blue 3 ]
}
}
box {
-<1, 1, 1>/2, <1, 1, 1>/2
texture {
pigment {
average
pigment_map {
[ PigmentR ]
[ PigmentG ]
[ PigmentB ]
}
}
finish { ambient color rgb <1, 1, 1> } // Adjust brightness here
translate -<1, 1, 0>/2
}
scale <4, 3, 1>
}
// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
camera {
orthographic
location -3.1*z
look_at 0*y
}
background { color rgb <1, 1, 1> }
// ===== 1 ======= 2 ======= 3 ======= 4 ======= 5 ======= 6 ======= 7
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