pakt00

Built with p5.js and SuperCollider. See /f0blog/pact-februari/

//pakt00 ok - but missing lines from center to start of arc
let index;
let grad;
function setup() {
  let div= select('#sketch');
  let cnv= createCanvas(div.width, div.height);
  cnv.parent('sketch');
  frameRate(60);
  noFill();
  strokeWeight(1);
  stroke(255, 255, 255*0.8, 255);
  index= 0;
  grad= createGraphics(width, height);
  grad.noStroke();
  for(let r= width; r>0; --r) {
    grad.fill(lerpColor(color(255, 255, 0.8*255), color(0, 0, 0), r/width));
    grad.ellipse(width*0.5, height*0.5, r*2.0, r*2.0);
  }
}
function draw() {
  let x= width*0.5;
  let y= height*0.5;
  let w= width*0.25;
  let h= height*0.25;
  image(grad, 0, 0);
  for(let i= 0; i<120; i++) {
    let start= sin((index+i)*0.006+i)*PI;
    let end= sin((index+i)*0.0123+i)*2*PI;
    if(start<end) {
      let r= sin(index*0.01+i)*70+75;
      arc(x, y, r*2.0, r*2.0, start, end);
    } else {
      let r= sin(index*0.01+i)*50.0+55.0;
      arc(x+(sin(i*0.21)*w), y+(cos(i*0.2)*h), r*2.0, r*2.0, end, start);
    }
  }
  index++;
}

Ndef(\sines).play
(
Ndef(\sines, {GVerb.ar(Splay.ar(SinOsc.ar([100, 200, 300]+SinOsc.ar([0.11, 0.22, 0.33]), SinOsc.ar([0.1, 0.2, 0.3], 0, 2pi), 0.1+SinOsc.ar([0.01, 0.02, 0.03], 0, 0.05)), SinOsc.ar(SinOsc.ar(SinOsc.ar(0.13, 0, 5, 6), 0, 8, 50), 0, 1, 1), 0.7, SinOsc.ar(1.2, 0, 0.6)), 20, 5, 1, 0.5, 25, 0, 1, 1)})
)
Ndef(\sines).stop