AStarXNA.AStar.GetTieBreaker C# (CSharp) Метод

        double GetTieBreaker(GridCell cell)
        {
            /*
             * http://theory.stanford.edu/~amitp/GameProgramming/Heuristics.html#S12
             */
            int dx1 = cell.Position.X - grid.Destination.Position.X,
                dy1 = cell.Position.Y - grid.Destination.Position.Y,
                dx2 = grid.Source.Position.X - grid.Destination.Position.X,
                dy2 = grid.Source.Position.Y - grid.Destination.Position.Y,
                cross = Math.Abs(dx1 * dy2 - dx2 * dy1);
            return cross * 0.01;
        }
    }