/* Une classe de manipulation d'energies colorees       */
/*                                                      */
/* Auteur: Nicolas JANEY                                */
/* nicolas.janey@univ-fcomte.fr                         */
/* Octobre 2009                                         */

public class Energie {
  public float r;
  public float v;
  public float b;

  public Energie() {
    r = v = b = 0.0F;
  }

  public Energie(float r,float v,float b) {
    this.r = r;
    this.v = v;
    this.b = b;
  }

  public Energie(Energie e) {
    r = e.r;
    v = e.v;
    b = e.b;
  }

  public Energie(LumiereDirectionnelle ld,Materiel m,Direction n) {
    float ps = -ld.d.produitScalaire(n);
    if ( ps <= 0.0F ) {
      r = v = b = 0.0F;
      return; }
    float fact = ps*ld.i;
    r = fact*ld.c.r*m.kd.r;
    v = fact*ld.c.v*m.kd.v;
    b = fact*ld.c.b*m.kd.b;
  }

  public Energie(LumierePonctuelle lp,Materiel m,Direction n,Position p) {
    Direction l = new Direction(p,lp.p);
    float ps = l.produitScalaire(n);
    if ( ps <= 0.0F ) {
      r = v = b = 0.0F;
      return; }
    float fact = ps*lp.i/lp.p.carreDistance(p);
    r = fact*lp.c.r*m.kd.r;
    v = fact*lp.c.v*m.kd.v;
    b = fact*lp.c.b*m.kd.b;
  }
}