private static void SerializeTiles(BinaryWriter writer, Extent extent)
{
var dimensions = extent.Dimensions;
for (var x = 0; x < dimensions.X; ++x)
{
for (var y = 0; y < dimensions.Y;)
{
var tile = extent.GetTile(new Vector(x, y));
var data = SerializeTile(tile, out var dataIndex, out var headerIndex);
short repeat = 0;
while (++y < dimensions.Y && tile == extent.GetTile(new Vector(x, y)))
{
++repeat;
}
if (repeat > 0)
{
data[dataIndex++] = (byte)repeat;
if (repeat <= 255)
{
data[headerIndex] |= 64;
}
else
{
data[headerIndex] |= 128;
data[dataIndex++] = (byte)(repeat >> 8);
}
}
writer.Write(data, headerIndex, dataIndex - headerIndex);
}
}
}
public static Clipboard CopyFrom([NotNull] Extent extent, [NotNull] Region region)
{
if (extent == null)
{
throw new ArgumentNullException(nameof(extent));
}
if (region == null)
{
throw new ArgumentNullException(nameof(region));
}
var dimensions = region.Dimensions;
var clipboard = new Clipboard(new Tile?[dimensions.X, dimensions.Y]);
foreach (var position in region.Where(extent.IsInBounds))
{
var offsetPosition = position - region.LowerBound;
clipboard.SetTile(offsetPosition, extent.GetTile(position));
}
foreach (var entity in extent.GetTileEntities().Where(e => region.Contains(e.Position)))
{
var offsetPosition = entity.Position - region.LowerBound;
clipboard.AddTileEntity(entity.WithPosition(offsetPosition));
}
return(clipboard);
}
/// <inheritdoc /> public override bool Test(Extent extent, Vector position) => _template.Matches(extent.GetTile(position));