Splot 03

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function setup() {

  createCanvas(windowWidth*0.5, windowHeight*0.7);

  background(0);

  randomSeed(99);

  frameRate(60);

}

​

​

function splot(x,y,c1, c2, c3)

{

  loadPixels();

  for(var i = max(floor(x-width/4),0); i < min(floor(x+width/4),width); i+=1) {

    for(var j = max(floor(y-width/4),0); j < min(floor(y+width/4),height); j+=1) {

      var px = i;

      var py = j;

      var xp = i-x;

      var yp = j-y;

      xp /= height;

      yp /= height;

      d = 4*sqrt(xp*xp+yp*yp); 

      xp += d*noise((px+x)/300,(py+y)/300)-d/2;

      yp += d*noise((py+y)/300,(px+x)/300)-d/2;

      d = sqrt(xp*xp+yp*yp); 

      if(d < 0.03) {

        set(px,py,color(c1,c2,c3,255));

        set(width-px,py,color(c1,c2,c3,255));

        set(px,height-py,color(c1,c2,c3,255));

        set(width-px,height-py,color(c1,c2,c3,255));

      }

    }

  }

  updatePixels();

}

​

​

function draw() {

  var x = random(width);

  var y = random(height);

  var dx = (x - width/2)/(height/2);

  var dy = (y - height/2)/(height/2);

  var d = sqrt(dx*dx+dy*dy)/2;

  if(d<0.4) splot(x,y,255*d,0,0);

  else if(d<0.7) splot(x,y,0,127*d,0);

  else splot(x,y,10*d,10*d,10*d);

  if(keyIsPressed || mouseIsPressed) {

    clear(); 

  }

}