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);
}