Butterfly evolution - OpenProcessing

Butterfly_evolution
Butterfly
Part
Point
xxxxxxxxxx
 
let w1Points, butterflies, parts;
let colors, ncolors;
let nRows, nColumns, rowHeight, columnWidth;
let aPoints, nInner;
let backGroundColor;
let mid1;
let beta=0.3;
let randomFactor=0.1;
let play=true;
​
function setup() {
​
  createCanvas(windowWidth, windowHeight);
  colorMode(HSB, 360, 255, 255, 255);  
  ncolors=6;
  backGroundColor=color(random(360), random(50), random(225, 255));
  background(backGroundColor);  
  colors=[];
  butterflies=[];
  strokeWeight(1.5);
  strokeJoin(ROUND);
  imageMode(CENTER); 
  nRows=int(random(1, 6));
  if (windowWidth>windowHeight)nColumns=int(1.5*nRows);
  else nColumns=int(.75*nRows);
  columnWidth=int(windowWidth/nColumns);
  rowHeight=int(windowHeight/nRows);  
  nInner=int(random(2, 10));  
  parts=[];
  aPoints=[[ new Point(.5, .2, 0), new Point(.48, .4, randomFactor), new Point(.5, .6, 0), true, true], 
    [ new Point(.5, .3, 0), new Point(.45, .6, randomFactor), new Point(.35, .7, randomFactor), new Point(.25, .5, 0), true, true], 
    [new Point(.5, .3, 0), new Point(.45, .16, randomFactor), new Point(.25, .11, randomFactor), new Point(.11, .14, randomFactor), new Point(.16, .3, randomFactor), new Point(.25, .5, 0), true, true], 
    [new Point(.5, .2, 0), new Point(.47, .01, randomFactor), new Point(.43, .01, 0), false, false]];
  for (col=0; col<ncolors; col++) {
    colors[col]=color(random(360), random(255), random(255), random(255));//,random(1)>.5 ?100:220
  }
  for (let k=0; k<aPoints.length; k++) {
    parts[k]= new Part(k, aPoints[k]);
    parts[k].randomize();
  }
}
​
function draw() {
  if (play) {
    backGroundColor=color(random(360), random(50), random(225, 255));
    beta=random(0.1, 0.5);    
    background(backGroundColor);
    nRows=4;//int(random(1, 6));
    if (windowWidth>windowHeight)nColumns=int(1.5*nRows);
    else nColumns=int(.75*nRows);
    columnWidth=int(windowWidth/nColumns);
    rowHeight=int(windowHeight/nRows);  
    for (nr=0; nr<nRows; nr++) {
      for (nc=0; nc<nColumns; nc++) {
        nIn=max(0,nInner+random(-2,2));  
        push();
        scale(columnWidth, rowHeight);
        if(nc!=0||nr!=0)varycolors(randomFactor);
        let but=new Butterfly(nr*nColumns+nc, parts.slice(),colors,nIn);
        butterflies[nr*nColumns+nc]=but;
        translate(nc, nr);        
        strokeWeight(1/columnWidth);
        for (let k=0; k<parts.length; k++) {
          parts[k].randomize();      
          fill(colors[(3*k)%ncolors]);
          parts[k].display();
          parts[k].displaySym();
          parts[k].displayMid();
        }
        
        pop();
      }
    }
  }
  play=false;
}
function init(but) {
  parts=but.parts.slice();  
  for (let k=0; k<parts.length; k++) {
   let dec=parts[k].points[parts[k].points.length-1];
   let clos=parts[k].points[parts[k].points.length-2];
    parts[k].points=parts[k].rpoints.slice();
    parts[k].points.push(clos);
    parts[k].points.push(dec);
  }
  colors=but.cols.slice();
  nInner=but.nIn
}
function touchStarted() {
  if (!play)play=true;
  let nx=int(mouseX/columnWidth);
  let ny=int(mouseY/rowHeight);
  let index=ny*nColumns+nx;
  init(butterflies[index]);
}
function deviceTurned() {
  play=true;
  setup();
}
function varycolors(raf) {
  let h, s, b, a;
  if(random(1)>.9) {
    raf*=50.0;
    /*fill(0);
    textSize(24);
    alert(raf);*/
  }
  for (col=0; col<ncolors; col++) {    
    h=hue(colors[col])+int(random(-20*raf,20*raf))%360; 
    s=saturation(colors[col])+int(random(-20*raf,20*raf))%255;
    b=brightness(colors[col])+int(random(-20*raf,20*raf))%255;
    a=max(50, alpha(colors[col])+int(random(-20*raf,20*raf))%255);//*random(1-rf, 1+rf)%255);
    colors[col]=color(h, s, b, a);
  }         
}
function mid(a, b, c) {
  return new p5.Vector(a.x+c*(b.x-a.x), a.y+c*(b.y-a.y));
}