OpenRA.Map.InitializeCellProjection C# (CSharp) Method

        void InitializeCellProjection()
        {
            if (initializedCellProjection)
                return;

            initializedCellProjection = true;

            cellProjection = new CellLayer<PPos[]>(this);
            inverseCellProjection = new CellLayer<List<MPos>>(this);

            // Initialize collections
            foreach (var cell in AllCells)
            {
                var uv = cell.ToMPos(Grid.Type);
                cellProjection[uv] = new PPos[0];
                inverseCellProjection[uv] = new List<MPos>();
            }

            // Initialize projections
            foreach (var cell in AllCells)
                UpdateProjection(cell);
        }