fin.alg_monte-carlo _a

function setup() {

  createCanvas(800, 800);

  seed = Date.now();

  randomSeed(seed);

  background(0);

  noLoop();

}

​

function draw() {

  let total = 10000;

  let circle = 0;

​

  // Calcul de l'estimation de pi via la méthode de Monte Carlo

  for (let i = 0; i < total; i++) {

    let x = random(-1, 1);

    let y = random(-1, 1);

​

    let distance = x * x + y * y;  // Distance au carré par rapport au centre

    if (distance <= 1) {

      circle++;

    }

​

    // Dessin des points

    push();

    translate(width / 2, height / 2);

    scale(width / 2);

    strokeWeight(0.015);

    cr = random(0, 255);

    if (distance <= 1) {

      stroke(cr, cr, cr/2);

    } else {

      stroke(cr/2, cr, cr);

    }

    point(x, y);

    pop();

  }

​

  // Estimation de pi

  let piEstimate = 4 * (circle / total);

  // Affichage de pi

  push();

  stroke(255);

  strokeWeight(2);

  fill(cr, cr, cr);

  textAlign(CENTER);

  textSize(36);

  textStyle(ITALIC);

  text("Monte-Carlo Pi", width/2,height-150);

  textSize(72);

  textStyle(NORMAL);

  text(piEstimate, width/2,height-80);

  strokeWeight(1);

  textSize(12);

  text("https://en.m.wikipedia.org/wiki/Monte_Carlo_method", width/2,height-20);

  pop();

}

​

function keyTyped() {

  if (key === "s" || key === "S") {

    saveCanvas("fin.alg_monte-carlo_a-" + floor(random(100)), "png");

  }

}