// TriFace.java

public class TriFace {
   public TriFace (Vertex vertex, Vertex vertex1, Vertex vertex2, Color color1)
   {  normal = new Vector ();
      a = vertex;  b = vertex1;  c = vertex2;
      color = color1;
     Vector vector  = new Vector ();
      vector.load     (vertex1.vector);
      vector.subtract (vertex.vector);
     Vector vector1 = new Vector ();
      vector1.load     (vertex2.vector);
      vector1.subtract (vertex.vector);
      vector.cross     (vector1, normal);
      normal.normalize ();  normal.w = 0.0F;
   }

   public Vertex a, b, c;
   public Vector normal;
   public Color  color;
}