Flatten 2D Arrays

private int CoordinatesToFlatIndex(Vector2Int cellIndex, int height)
        {
            return height * cellIndex.x + cellIndex.y;
        }

        // If using width...
        // return width * cellIndex.y + cellIndex.x;

        private Vector2Int FlatIndexToCoordinates(int flatIndex, int height)
        {
            Vector2Int coordinates = new Vector2Int
            {
                x = flatIndex / height,
                y = flatIndex % height
            };
            return coordinates;
        }

        // If using width...
        /*
        Vector2Int coordinates = new Vector2Int
        {
            x = flatIndex % width,
            y = flatIndex / width
        };
        */