0401starthing

// this is a groovy star thing

// i found it here:

// https://p5js.org/examples/form-star.html

​

function setup() {

  createCanvas(windowWidth, windowHeight);

}

​

function draw() {

  background(102);

​

  push();

  translate(width * 0.2, height * 0.5);

  rotate(frameCount / 200.0);

  star(0, 0, 5, 70, 3);

  pop();

​

  push();

  translate(width * 0.5, height * 0.5);

  rotate(frameCount / 50.0);

  star(0, 0, 80, 100, 40);

  pop();

​

  push();

  translate(width * 0.8, height * 0.5);

  rotate(frameCount / -100.0);

  star(0, 0, 30, 70, 5);

  pop();

}

​

function star(x, y, radius1, radius2, npoints) {

  let angle = TWO_PI / npoints;

  let halfAngle = angle / 2.0;

  beginShape();

  for (let a = 0; a < TWO_PI; a += angle) {

    let sx = x + cos(a) * radius2;

    let sy = y + sin(a) * radius2;

    vertex(sx, sy);

    sx = x + cos(a + halfAngle) * radius1;

    sy = y + sin(a + halfAngle) * radius1;

    vertex(sx, sy);

  }

  endShape(CLOSE);

}

​