Colorful

// Pierre MARZIN 22/08/2022

var butterflyShader;

var pg;

var nrang,ncol;

​

function setup() {

  createCanvas(windowWidth, windowHeight, WEBGL);

  butterflyShader=new p5.Shader(this._renderer,vert,frag);

  butterflyShader.setUniform("iResolution", float(width), float(height)); 

  if (width>height) {nrang=float(floor(random(1.0,3.0)));

  ncol=float(floor(nrang));}

  else {ncol=float(floor(random(1.0,3.0)));

  nrang=float(floor(ncol));}

}

​

function draw() {

  butterflyShader.setUniform("iGlobalTime", millis()/1000.0);

  butterflyShader.setUniform("iResolution", [width, height]);

  butterflyShader.setUniform("nrang",nrang); 

  butterflyShader.setUniform("ncol",ncol); 

  shader(butterflyShader);

  box(max(width,height));

}

function mousePressed(){

  setup();

}