/************************************************
 *  Implementation of a light source            *
 *  Original code provided by Leonard McMillan  *
 ************************************************/

class Light {
// All the public variables here are ugly, but I
// wanted Lights and Surfaces to be "friends"
  public static final int AMBIENT = 0;
  public static final int DIRECTIONAL = 1;
  public static final int POINT = 2;
  
  public int lightType;
  public Vector3D lvec;           // the position of a point light or
                                  // the direction to a directional light
  public float ir, ig, ib;        // intensity of the light source
  
  public Light(int type, Vector3D v, float r, float g, float b) {
    lightType = type;
    ir = r;
    ig = g;
    ib = b;
    if (type != AMBIENT) {
      lvec = v;
      if (type == DIRECTIONAL) {
	lvec.normalize();
      }
    }
  }
}