public Tile[,] GetTiles(SlimEnvelope envelope)
{
if (envelope is null)
{
throw new ArgumentNullException(nameof(envelope));
}
var startRow = (int)Math.Floor((Origin.Y - envelope.YMax) / TileHeightMapUnits) - 1;
var startColumn = (int)Math.Floor((envelope.XMin - Origin.X) / TileWidthMapUnits);
var endRow = (int)Math.Ceiling((Origin.Y - envelope.YMin) / TileHeightMapUnits) - 1;
var endColumn = (int)Math.Ceiling((envelope.XMax - Origin.X) / TileWidthMapUnits);
var numRows = endRow - startRow + 1;
var numColumns = endColumn - startColumn;
var tiles = new Tile[numColumns, numRows];
for (int x = 0; x < numColumns; x++)
{
int column = x + startColumn;
for (int y = 0; y < numRows; y++)
{
int row = y + startRow;
var tilePosition = new TilePosition(row, column);
var xmin = Origin.X + (column * TileWidthMapUnits);
var ymin = Origin.Y - ((row + 1) * TileHeightMapUnits);
var xmax = xmin + TileWidthMapUnits;
var ymax = ymin + TileHeightMapUnits;
tiles[x, y] = new Tile(tilePosition, new SlimEnvelope(xmin, ymin, xmax, ymax, SpatialReference), LevelOfDetail);
}
}
return(tiles);
}
public Tile(TilePosition position, SlimEnvelope envelope, LevelOfDetail lod)
{
Position = position;
Envelope = envelope;
LevelOfDetail = lod ?? throw new ArgumentNullException(nameof(lod));
}