Genuary 17: Redefine Pi - OpenProcessing

mySketch
blob
xxxxxxxxxx
 
let engine
let blobs = []
const origPalette = ["#f398c3", "#cf3895", "#a0d28d", "#06b4b0", "#fef45f", "#fed000", "#0c163f"]
let palette = [...origPalette]
​
let prevCos = Math.cos
let prevSin = Math.sin
let prevPi = Math.PI
OPC.slider({
  name: 'newPi',
  value: 4,
  min: -10,
  max: 10,
  step:0.01,
  label: 'Math.PI',
  description: 'Redefine pi'
});
OPC.button('reset', 'Rerun')
Math.cos = (a) => prevCos(a / prevPi * newPi)
Math.sin = (a) => prevSin(a / prevPi * newPi)
Math.PI = newPi
​
function buttonPressed(variableName, value) {
  resetSim()
}
​
function resetSim() {
  while (blobs.length > 0) {
    blobs.pop().remove()
  }
  palette = [...origPalette]
  shuffle(palette)
  blobs.push(new Blob(random(-1,1)*100, 50, 100, palette.pop()))
}
​
function setup() {
  createCanvas(600, 600)
  // metaballShader = createShader(vert, frag)
  setupScene()
  resetSim()
}
​
function setupScene() {
  engine = Matter.Engine.create()
  
  const ground = Matter.Bodies.rectangle(0, height / 2 + 30, width, 60, {
    isStatic: true,
  })
  const wallLeft = Matter.Bodies.rectangle(-width/2 - 30, 0, 60, 3 * height, {
    isStatic: true,
  })
  const wallRight = Matter.Bodies.rectangle(width/2 + 30, 0, 60, 3 * height, {
    isStatic: true,
  })
  Matter.World.add(engine.world, [ground, wallLeft, wallRight])
}
​
function draw() {
  background('#faf8e2')
  translate(width/2, height/2)
  
  if (frameCount % (60 * 3) === 0 && palette.length > 0) {
    blobs.push(new Blob(random(-1,1)*100, -height/2 - 150, random(25, 150), palette.pop()))
  }
  
  for (const blob of blobs) {
    blob.update()
  }
  Matter.Engine.update(engine, 1000 / 60)
  
  for (const blob of blobs) {
    blob.draw2D()
  }
}