﻿ processing « Coding, Sounds and Colors | A blog about algorithmic experiments in music and visual art. Sort of.

posted by on 2013.02.19, under Processing
19:

The “triadic” discrete time dynamical system, i.e. the one obtained by iterating the function f(x)=3*x mod 1, is a very interesting one, showing a chaotic behaviour for given values of the starting point. I have used a bidimensional version of this in the following code, done with Processing: the starting point is given by (0.12,2.13), and at each iteration you have a line connecting the point at step n with the one at step n-1.
The number of points per frame is dictated by the x-position of the mouse, while the y-position controls the transparency of the lines. The x-position also controls their thickness.

float x;
float y;
float a=0.12;
float b=2.13;
float points=500;
float s;
boolean paused=true;

void setup(){
size(400,400);
background(255);
}

void draw(){
if (!paused){
points=map(mouseX,0,width,0,500);
s=map(mouseY,0,height,0,100);
background(255);
translate(width/2,height/2);
stroke(0,int(s));
strokeWeight(int(points/100));
for (int i=0;i<points;i++){
x=(3*a) % 1;
y=(3*b) % 1;
line(map(a,0,1,-width/2,width/2),map(b,0,1,-height/2,height/2),map(x,0,1,-width/2,width/2),map(y,0,1,-height/2,height/2));
a=x;
b=y;
};
};
};

void mousePressed() {
// if paused == true make it false
if(paused) {
paused = false;
}
// otherwise make it true
else {
paused = true;
}
};

Click on the white square to start/stop the animation. 😉

## Hello World!

posted by on 2013.02.11, under Processing, Supercollider
11:

Here’s some cheers from the main programming environments I like to experiment with, namely Supercollider and Processing

“Hello World! Let’s make some noise”.postln

and

println(“Hello Word! Coloring pixels, anyone?”) • 