Cours:BallePOO

class Balle
{
  PVector position;
  PVector vitesse;
  PVector zoneBD;
  PVector zoneHG;
  float rayon;
  int couleur = 100;
  
  Balle(PVector p, PVector v, PVector bBD,PVector bHG, float r)
  {
    p.add(bHG);
    this.position = p;
    this.vitesse = v;
    this.rayon = r;
    this.zoneBD = bBD;
    this.zoneHG = bHG;
  }
  void deplacer()
  {
    this.position.add(this.vitesse);
  }
  void go()
  {
    this.deplacer();
    this.rebondir();
    this.afficher();
  }
  void rebondir()
  {
    if ((position.x-rayon)<zoneHG.x) {if (vitesse.x<0) vitesse.x=-vitesse.x;}
    if ((position.y-rayon)<zoneHG.y) {if (vitesse.y<0) vitesse.y=-vitesse.y;}
    if ((position.x+rayon)>zoneBD.x) {if (vitesse.x>0) vitesse.x=-vitesse.x;}
    if ((position.y+rayon)>zoneBD.y) {if (vitesse.y>0) vitesse.y=-vitesse.y;}
  }
  void afficher()
  {
    fill(this.couleur);
    ellipse(this.position.x,
            this.position.y,
            2*this.rayon,
            2*this.rayon);
  }
}

ArrayList <Balle> objets;

PVector coinHG1, coinBD1;
PVector coinHG2, coinBD2;

void setup()
{
  PVector espace = new PVector(600,400);
  size((int)espace.x,(int)espace.y);
 
  coinHG1 = new PVector(10,40);
  coinBD1 = new PVector(200,300);
  coinHG2 = new PVector(210,10);
  coinBD2 = new PVector(550,350);
  objets = new ArrayList<Balle>();
  
  objets.add(new Balle(new PVector(20,20),new PVector(1,1),coinBD1,coinHG1,4));
  objets.add(new Balle(new PVector(20,20),new PVector(5,-2),coinBD1,coinHG1,10));
  objets.add(new Balle(new PVector(20,20),new PVector(3.2,3),coinBD2,coinHG2,4));
  objets.add(new Balle(new PVector(20,20),new PVector(4,3),coinBD1,coinHG1,4));
  objets.add(new Balle(new PVector(20,20),new PVector(1,-1),coinBD2,coinHG2,4));
}

void draw()
{
  background(0);
  fill(250);
  rect(coinHG1.x,coinHG1.y,coinBD1.x-coinHG1.x,coinBD1.y-coinHG1.y);
  fill(200);
  rect(coinHG2.x,coinHG2.y,coinBD2.x-coinHG2.x,coinBD2.y-coinHG2.y);
  for (int i=0;i<objets.size();i++)
    objets.get(i).go();

}