1701Lsystems1

// Lindenmayer systems

​

var thestring = 'A'; // the starting string ("axiom")

var therules = [];

// rules: what am i looking for? what am i replacing it with?

therules[0] = ['A', 'B'];

therules[1] = ['B', 'BCA'];

therules[2] = ['C', 'ADB'];

therules[3] = ['D', 'CAD'];

var numproductions = 5;

var ptr = 0;

var Asnd, Bsnd, Csnd;

​

function preload()

{

  Asnd = loadSound('A.mp3');

  Bsnd = loadSound('B.mp3');

  Csnd = loadSound('C.mp3');

}

​

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

  // triple loop:

  for(let i = 0;i<numproductions;i++)

  {

    var outstring = '';

    for(let j = 0;j<thestring.length;j++)

    {

      for(let k = 0;k<therules.length;k++)

      {

        var ismatch = 0;

        if(thestring.charAt(j)==therules[k][0]) // MATCH

        {

          outstring+=therules[k][1]; // copy of the second half

          ismatch=1;

          break;

        }

      }

      if(ismatch==0) outstring+=thestring.charAt(j);

    }

    thestring=outstring;

    console.log(thestring);

  }

  frameRate(5);

}

​

function draw() {

  background(0);

  fill(255);

  textSize(60);

  var c = thestring.charAt(ptr);

  text(c, width/2, height/2);

  if(c=='A') Asnd.play();

  if(c=='B') Bsnd.play();

  if(c=='C') Csnd.play();

  ptr = (ptr+1)%thestring.length;

}