示例#1
0
        internal static IEnumerable <ImageCollectionTile> GenerateCollectionTiles(
            IEnumerable <int> ids,
            int levelSize
            )
        {
            var imagesInEachDimension = NumberOfImagesInEachDimension(levelSize);
            var imagesPerTile         = imagesInEachDimension * imagesInEachDimension;
            var mortonNumber          = 0;
            var imagesThisTile        = 0;

            var currentRow           = 0;
            var currentColumn        = 0;
            var idsForTile           = new List <int> ();
            var startingMortonNumber = 0;

            foreach (var id in ids)
            {
                idsForTile.Add(id);

                mortonNumber++;
                imagesThisTile++;
                if (imagesThisTile == imagesPerTile)
                {
                    var imageCollectionTile =
                        new ImageCollectionTile(currentRow, currentColumn, startingMortonNumber, idsForTile);
                    yield return(imageCollectionTile);

                    startingMortonNumber = mortonNumber;
                    imagesThisTile       = 0;
                    var point = MortonLayout.Decode(mortonNumber);
                    currentColumn = point.X / imagesInEachDimension;
                    currentRow    = point.Y / imagesInEachDimension;
                    idsForTile.Clear();
                }
            }
            if (imagesThisTile > 0)
            {
                var imageCollectionTile =
                    new ImageCollectionTile(currentRow, currentColumn, startingMortonNumber, idsForTile);
                yield return(imageCollectionTile);
            }
        }
        internal static IEnumerable<ImageCollectionTile> GenerateCollectionTiles (
            IEnumerable<int> ids,
            int levelSize
        )
        {
            var imagesInEachDimension = NumberOfImagesInEachDimension (levelSize);
            var imagesPerTile = imagesInEachDimension * imagesInEachDimension;
            var mortonNumber = 0;
            var imagesThisTile = 0;

            var currentRow = 0;
            var currentColumn = 0;
            var idsForTile = new List<int> ();
            var startingMortonNumber = 0;
            foreach (var id in ids)
            {
                idsForTile.Add (id);

                mortonNumber++;
                imagesThisTile++;
                if (imagesThisTile == imagesPerTile)
                {
                    var imageCollectionTile = 
                        new ImageCollectionTile (currentRow, currentColumn, startingMortonNumber, idsForTile);
                    yield return imageCollectionTile;
                    startingMortonNumber = mortonNumber;
                    imagesThisTile = 0;
                    var point = MortonLayout.Decode (mortonNumber);
                    currentColumn = point.X / imagesInEachDimension;
                    currentRow = point.Y / imagesInEachDimension;
                    idsForTile.Clear ();
                }
            }
            if (imagesThisTile > 0)
            {
                var imageCollectionTile = 
                    new ImageCollectionTile (currentRow, currentColumn, startingMortonNumber, idsForTile);
                yield return imageCollectionTile;
            }
        }