public SQuantizedExtent3D ComputeQuantizedTileExtent(IGridCoord tile, IQuantizedExtentGrid grid)
{
var min = new SQuantizedPoint3D(
(grid.CellSizeX * tile.Col + MinX),
(grid.CellSizeY * tile.Row + MinY),
MinZ
);
var max = new SQuantizedPoint3D(
(Math.Min(min.X + grid.CellSizeX, MaxX)),
(Math.Min(min.Y + grid.CellSizeY, MaxY)),
MaxZ
);
return(new SQuantizedExtent3D(min, max));
}
public IEnumerable <SimpleGridCoord> GetCellCoordsInScaledRange(int scaledX, int scaledY, IQuantizedExtentGrid scaledGrid)
{
var startX = (ushort)Math.Floor(scaledX * scaledGrid.CellSizeX / (double)CellSizeX);
var startY = (ushort)Math.Floor(scaledY * scaledGrid.CellSizeY / (double)CellSizeY);
var endX = (ushort)Math.Ceiling((scaledX + 1) * scaledGrid.CellSizeX / (double)CellSizeX);
var endY = (ushort)Math.Ceiling((scaledY + 1) * scaledGrid.CellSizeY / (double)CellSizeY);
if (endX > SizeX)
{
endX = SizeX;
}
if (endY > SizeY)
{
endY = SizeY;
}
for (var y = startY; y < endY; y++)
{
for (var x = startX; x < endX; x++)
{
if (!EqualityComparer <T> .Default.Equals(Data[y, x], default(T)))
{
yield return(new SimpleGridCoord(y, x));
}
}
}
}