class Surface {
  public float r, g, b;
  public float ka, kd, ks, ns;

  public Surface() {
  }
  
  public Surface(float sr, float sg, float sb, float ska, float skd, 
		 float sks, float sns)
  {
    r = sr; g = sg; b = sb;
    ka = ska; kd = skd; ks = sks; ns = sns;
  }
}