public class Direction extends CoordonneesHomogenes {

  public Direction() {
    super();
    c[3] = 0.0F;
  }

  public Direction(float x,float y,float z) {
    super();
    c[0] = x;
    c[1] = y;
    c[2] = z;
    c[3] = 0.0F;
  }

  public Direction(CoordonneesHomogenes ch) {
    super();
    c[0] = ch.c[0];
    c[1] = ch.c[1];
    c[2] = ch.c[2];
    c[3] = 0.0F;
  }
}