class Bille  {
  float  vx, vy, tempo, amorti, r, m,_x,_y,_xscale,_yscale,alfa,rouge,vert,bleu,lar2,lon2,vibra;
  int numero,nb;
  boolean presse;
  Systeme lesysteme;
  public Bille(int nb,Systeme ss,int numero) {
    this.nb=nb;
    this.lesysteme = ss;
    this.numero = numero;
    init();
  }
  void  init() {
    vibra=random(2,5);
    lar2=lesysteme.lar2;
    lon2=lesysteme.lon2;
    this._x = random(-400,400);
    this._y = random(-400,400);
   
    if(numero==0)
    {
      this._yscale=100;
      this.vx = 4000;
      this.vy = 3500;
    }
    else
    {
      this._yscale = 50+random(50);
        this.vx = random(2000,3000);
      this.vy = random(-3000,-2000);
    }
    this._xscale = this._yscale;
    this.alfa=0;
    this.r = _yscale/2;
    this.m = r*r*r;
    this.presse = false;
    this.tempo = 0.01;
    this.amorti = 1;  
    this.rouge=55;
    this.vert=101;
    this.bleu=254;
  }
  void comportement() {

    limite();
    choc();
    vx *= amorti;
    vy *= amorti;
    _x += tempo*vx;
    _y += tempo*vy;

  }

  void  limite() {
    if (_x>lar2-r) {
      jaune(vx,vy);
      _x = lar2-r;
      vx *= -1;
    }
    if (_x<-lar2+r) {
      jaune(vx,vy);
      _x = -lar2+r;
      vx *= -1;
    }
    if (_y>lon2-r) {
      jaune(vx,vy);
      _y = lon2-r;
      vy *= -1;
    }
    if (_y<-lon2+r) {
      jaune(vx,vy);
      _y = -lon2+r;
      vy *= -1;
    }
  }
  void jaune(float a,float b){
    rouge=255;
    vert=255;
    bleu=0;
    lesysteme.chocx+=a/50;
    lesysteme.chocy+=b;
  }

  void  choc() {
    for (int i = 0; i<nb; i++) {
      int j = numero;
      if (i<j) {
        float a = _x-lesysteme.table[i]._x;
        float b = _y-lesysteme.table[i]._y;
        float cc = sqrt(a*a+b*b);
        float c = lesysteme.table[i].r+r;
        float dis = a*a+b*b-c*c;
        if (dis<0) {
          rouge=lesysteme.table[i].rouge=255;
          vert=lesysteme.table[i].vert=0;
          bleu=lesysteme.table[i].bleu=0;
          float nx = a/cc;
          float ny = b/cc;
          float tx = -ny;
          float ty = nx;
          float rm = lesysteme.table[i].m/m;
          float e = amorti;
          float xx = (1-rm*e)/(1+rm)*(vx*nx+vy*ny)+rm*(1+e)/(1+rm)*(lesysteme.table[i].vx*nx+lesysteme.table[i].vy*ny);
          float yy = vx*tx+vy*ty;
          float xx1 = (1+e)/(1+rm)*(vx*nx+vy*ny)+(rm-e)/(1+rm)*(lesysteme.table[i].vx*nx+lesysteme.table[i].vy*ny);
          float yy1 = lesysteme.table[i].vx*tx+lesysteme.table[i].vy*ty;
          vx = xx*nx+yy*tx;
          vy = xx*ny+yy*ty;
          lesysteme.table[i].vx = xx1*nx+yy1*tx;
          lesysteme.table[i].vy = xx1*ny+yy1*ty;
          _x = lesysteme.table[i]._x+(c+1)*nx;
          _y = lesysteme.table[i]._y+(c+1)*ny;
        }
      }
    }
  }
  void dessiner(){
    pushMatrix();
    translate(_x,_y,0);
    ellipseMode(CENTER);
    noStroke();
    if (numero==0){fill(255,155,10);}else{fill(100,100,255);}
    translate(0,0,2);
    ellipse(0,0,1.7*r,1.7*r);

    alfa+=(-atan2(vx,vy)-alfa)/4;
    rotateZ(alfa);

    noStroke();
    scale(r/10);
    rotateX(HALF_PI+sin(vibrato*vibra)/3);
    rotateY(HALF_PI+cos(vibrato)); 
    translate(0,15+2*r/10+5*cos(vibrato*vibra*1.4),0);
    
    model.draw();

    popMatrix();
  }
}