1703Lsystems3_theplant - OpenProcessing

mySketch
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// Lindenmayer systems
​
var thestring = '';
var therules = [];
var numproductions, t, d;
​
// plant 1
// thestring = 'F'; // the starting string ("axiom")
// therules[0] = ['F', 'F[+F]F[-F][F]'];
// numproductions = 5;
// t = 30; // turn amount
// d = 20;
​
​
// plant 2
// thestring = 'F'; // the starting string ("axiom")
// therules[0] = ['F', 'FF-[-F+F+F]+[+F-F-F]'];
// numproductions = 4;
// t = 22.5; // turn amount
// d = 15;
​
// plant 3
thestring = 'X'; // the starting string ("axiom")
therules[0] = ['X', 'F[+X][-X]FX'];
therules[1] = ['F', 'FF'];
numproductions = 7;
t = 25.7; // turn amount
d = 3;
​
​
var ptr = 0;
var Asnd, Bsnd, Csnd;
​
// graphics stuff:
// a simple version of Papert's turtle
var x = [];
var y = [];
var a = [];
var lpf = 20; // letters per frame
​
function preload()
{
  Asnd = loadSound('A.mp3');
  Bsnd = loadSound('B.mp3');
  Csnd = loadSound('C.mp3');
}
​
​
function setup() {
  createCanvas(windowWidth, windowHeight);
  init();
  
  // 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(12);
  strokeWeight(3);
}
​
function draw() {
  var c;
  for(let i = 0;i<lpf;i++)
  {
    c = thestring.charAt(ptr);
    if(ptr<thestring.length) doTurtle(c);
    ptr = ptr+1;
  }
}
​
function init() {
  background(255);
  x = [];
  y = [];
  a = [];
  x[0] = width/2;
  y[0] = height;
  a[0] = PI*3/2;
}
​
function doTurtle(k) {
  if(k=='c') init();
  if(k=='F') // draw forward
  {
    let x1 = x[x.length-1] + d*cos(a[a.length-1]);
    let y1 = y[y.length-1] + d*sin(a[a.length-1]);
    line(x[x.length-1], y[y.length-1], x1, y1);
    x[x.length-1] = x1;
    y[y.length-1] = y1;
    redraw();
  }
  if(k=='+') // turn right
  {
    a[a.length-1]+=radians(t);
  }
  if(k=='-') // turn left
  {
    a[a.length-1]-=radians(t);
  }
  if(k=='[') // start branch
  {
    x.push(x[x.length-1]);
    y.push(y[y.length-1]);
    a.push(a[a.length-1]);
  }
  if(k==']') // end branch
  {
    x.pop();
    y.pop();
    a.pop();
  }
  
}