/// <summary>
/// No data so return an empty tile
/// </summary>
/// <returns></returns>
private bool BuildEmptyTile()
{
_log.LogDebug($"#Tile#.({TileX},{TileY}) Execute End. Returning empty tile. Zoom:{TileZ}, GridSize{QMConstants.FlatResolutionGridSize}");
// Even empty tiles must have header info correctly calculated
if (ElevData.GridSize == QMConstants.NoGridSize)
{
ElevData = new ElevationData(LowestElevation, QMConstants.FlatResolutionGridSize); // elevation grid
}
ElevData.MakeEmptyTile(TileBoundaryLL, HasLighting);
if (ElevData.HasLighting)
{
ComputeNormalMap();
}
QMTileBuilder tileBuilder = new QMTileBuilder()
{
TileData = ElevData,
GridSize = ElevData.GridSize
};
if (!tileBuilder.BuildQuantizedMeshTile())
{
_log.LogError($"Tile.({TileX},{TileY}) failed to build empty tile. Error code: {tileBuilder.BuildTileFaultCode}");
return(false);
}
QMTileResponse.ResultStatus = RequestErrorStatus.OK;
QMTileResponse.data = tileBuilder.QuantizedMeshTile; // return QM tile in response
ResultStatus = RequestErrorStatus.OK;
return(true);
}
public void TileBuilder_BuildTile()
{
LLBoundingBox TileBoundaryLL = MapGeo.TileXYZToRectLL(0, 0, 20, out var yFlip);
ElevationData elevData = new ElevationData(0, 5);
elevData.MakeEmptyTile(TileBoundaryLL, false);
QMTileBuilder tileBuilder = new QMTileBuilder()
{
TileData = elevData,
GridSize = elevData.GridSize
};
var res = tileBuilder.BuildQuantizedMeshTile();
res.Should().Be(true);
tileBuilder.QuantizedMeshTile.Should().HaveCountGreaterOrEqualTo(162);
tileBuilder.QuantizedMeshTile.Should().HaveCountLessOrEqualTo(164);
}