let PI = 0;

const STEP = 100;

let TOTAL = 0;

let IN_CIRCLE = 0;

​

function setup() {

  createCanvas(2*r, 2*r);

  background(220);

  ellipse(width/2, height/2, r*2, r*2);

}

​

function draw() {

  translate(r,r);

  strokeWeight(1)

  for(let i=0; i < STEP; i++){

    stroke('black');

    let v= createVector(random(-r,r),random(-r,r));

    if((v.x*v.x+v.y*v.y)<r*r){

      IN_CIRCLE++;

      stroke('red');

    }

    TOTAL ++;

    point(v.x,v.y);

​

  }

​

  //draw stats

  stroke('black')

  PI = 4*IN_CIRCLE/TOTAL

  rect(-180, -160, 200, 50);

  strokeWeight(0);

  textSize(12);

  textStyle(NORMAL);

  text("Nb. points dans le cercle : " + IN_CIRCLE, -175,-145);

  text("Nb. points total : "+TOTAL,  -175,-130);

  text("ratio cercle/total : "+PI.toFixed(9), -175,-115);

}