pakt08

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

//pakt08 not the exact correct filling rule
let n
let d, speed, spread, theta
const pnts = []
function setup() {
  const div = select('#sketch')
  const cnv = createCanvas(div.width, div.height)
  cnv.parent('sketch')
  frameRate(60)
  n = 25
  d = 0.0001
  speed = 0.00002
  spread = 2
  theta = 0
  for (let i = 0; i < n; i++) {
    pnts[i] = []
    pnts[i][0] = width * 0.5
    pnts[i][1] = height * 0.5
  }
  fill(255, 0, 0)
  blendMode(DIFFERENCE)
  noStroke()
}
function draw() {
  clear()
  background(0)
  let xx = width * 0.5,
    yy = height * 0.5
  beginShape()
  for (let i = 0; i < n; i++) {
    const c = cos(theta + i * d)
    const s = sin(theta + i * d)
    const x = (pnts[i][0] / width) * 2 - 1
    const y = (pnts[i][1] / height) * 2 - 1
    const vx = ((c * x - s * y) * 0.5 + 0.5) * width + spread
    const vy = ((c * y + s * x) * 0.5 + 0.5) * height + spread
    pnts[i][0] = vx
    pnts[i][1] = vy
    vertex(xx, yy)
    xx = vx
    yy = vy
    theta = theta + speed
  }
  endShape()
}

Ndef(\redqueen3).play
(
Ndef(\redqueen3, {GVerb.ar(LeakDC.ar(
  Saw.ar(
    Saw.ar([100, 101]+Saw.ar([102, 103], Saw.ar([4, 5], Saw.ar([1, 2], 6, 7).sum).sum).sum).exprange(Saw.ar(1/12, 4, 50), Saw.ar(1/8, 3, Saw.ar(1/16, 4, 65))),
    Saw.ar([21, 20], Saw.ar([40, 41], 0, 0.1), 0.2)
)), 60, 4, 0.5, 0.5, 5, 0.5, 0.5, 0.75)});
)
Ndef(\redqueen3).stop