Fractals

by SĂ©bastien Lorentz

JavaScript

function fractale(liste, nbr) {
  if (nbr > 0) {
    temp = []
    liste.forEach(function(line) {
      temp = temp.concat(fractale(line.split4(), nbr - 1))
    });
    return temp
  } else {
    return liste
  }
}

function drawline(line) {
console.log(line)
  ctx.beginPath();
  ctx.moveTo(line.debut.x, line.debut.y);
  ctx.lineTo(line.fin.x, line.fin.y);
  ctx.stroke();
}

// ----- Classes -----
function Point(x, y) {
  this.x = x;
  this.y = y;
}

function Ligne(debut, fin) {
  this.debut = debut;
  this.fin = fin;
  var self = this;

  // ----- Methods -----
  self.tier = (debut, fin) => {
    tierX = Math.abs(debut.x - fin.x) / 3 + Math.min(debut.x, fin.x)
    tierY = Math.abs(debut.y - fin.y) / 3 + Math.min(debut.y, fin.y)
    return new Point(tierX, tierY)
  }

  self.milieu = (debut, fin) => {
    middleX = Math.abs(debut.x - fin.x) / 2 + Math.min(debut.x, fin.x)
    middleY = Math.abs(debut.y - fin.y) / 2 + Math.min(debut.y, fin.y)
    return new Point(middleX, middleY)
  }

  self.sommet = (premierPoint, secondpoint, bool) => {
    dx = secondpoint.x - premierPoint.x
    dy = secondpoint.y - premierPoint.y
    longueur = Math.sqrt((dx * dx) + (dy * dy))
    dirX = dx / longueur
    dirY = dy / longueur
    hauteur = (Math.sqrt(3) / 2) * longueur
    cx = premierPoint.x + dx * 0.5
    cy = premierPoint.y + dy * 0.5
    pDirX = -dirY
    pDiry = dirX
    if (bool) {
      rx = cx + hauteur * pDirX
      ry = cy + hauteur * pDiry
    } else {
      rx = cx - hauteur * pDirX
      ry = cy - hauteur * pDiry
    }
    return new Point(rx, ry)
  }

  self.split4 = () => {
    middle = this.milieu(this.debut, this.fin);
    pointPremierQuart = this.milieu(this.debut, middle);
    pointSecondQuart = this.milieu(middle, this.fin);

    middle = this.sommet(pointPremierQuart, pointSecondQuart, false);

    premierQuart = new Ligne(this.debut, pointPremierQuart);
    secondQuart = new Ligne(pointPremierQuart, middle);
    troisiemeQuart = new Ligne(middle,...