/// <summary>
/// Creates a demo tile. Useful for development
/// </summary>
/// <returns></returns>
private bool BuildDemoTile()
{
_log.LogDebug($"#Tile.({TileX},{TileY}) Returning demo tile. (X:{TileX}, Y:{TileX},{TileY}, Z:{TileZ}), GridSize{QMConstants.DemoResolutionGridSize}");
// Even empty tiles must have header info correctly calculated
if (ElevData.GridSize == QMConstants.NoGridSize)
{
ElevData = new ElevationData(LowestElevation, QMConstants.DemoResolutionGridSize); // elevation grid
}
ElevData.MakeDemoTile(TileBoundaryLL);
QMTileBuilder tileBuilder = new QMTileBuilder()
{
TileData = ElevData,
GridSize = ElevData.GridSize
};
if (!tileBuilder.BuildQuantizedMeshTile())
{
_log.LogError($"Tile.({TileX},{TileY}) failed to build demo 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);
}
/// <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);
}
/// <summary>
/// Executor that implements requesting and rendering grid information to create the grid rows
/// </summary>
/// <returns></returns>
public async Task <bool> ExecuteAsync()
{
// Get the lat lon boundary from xyz tile request
TileBoundaryLL = MapGeo.TileXYZToRectLL(TileX, TileY, TileZ, out var yFlip);
_log.LogInformation($"#Tile#.({TileX},{TileY}) Execute Start. DMode:{DisplayMode}, HasLighting:{HasLighting}, Zoom:{TileZ} FlipY:{yFlip}. TileBoundary:{TileBoundaryLL.ToDisplay()}, DataModel:{DataModelUid}");
if (TileZ == 0) // Send back default root tile
{
MakeRootTile();
return(true);
}
SiteModel = DIContext.Obtain <ISiteModels>().GetSiteModel(DataModelUid);
if (SiteModel == null)
{
ResultStatus = RequestErrorStatus.NoSuchDataModel;
_log.LogError($"Tile.({TileX},{TileY}) Failed to obtain site model for {DataModelUid}");
return(false);
}
var siteModelExtentWithSurveyedSurfaces = SiteModel.GetAdjustedDataModelSpatialExtents(null);
_log.LogDebug($"Tile.({TileX},{TileY}) Site model extents are {siteModelExtentWithSurveyedSurfaces}. TileBoundary:{TileBoundaryLL.ToDisplay()}");
if (!siteModelExtentWithSurveyedSurfaces.IsValidPlanExtent) // No data return empty tile
{
return(BuildEmptyTile());
}
// We will draw all missing data just below lowest elevation for site
LowestElevation = (float)siteModelExtentWithSurveyedSurfaces.MinZ - 1F;
Initialise(); // setup tile requirements
if (TileGridSize == QMConstants.FlatResolutionGridSize) // Too far out to see detail so return empty tile
{
return(BuildEmptyTile());
}
if (DisplayMode == QMConstants.DisplayModeDemo) // development use only
{
return(BuildDemoTile());
}
try
{
var setupResult = await SetupPipelineTask(siteModelExtentWithSurveyedSurfaces, SiteModel.CellSize);
if (!setupResult)
{
if (ResultStatus != RequestErrorStatus.InvalidCoordinateRange)
{
_log.LogError($"Tile.({TileX},{TileY}) Unable to setup pipelinetask.");
}
return(BuildEmptyTile());
}
processor.Process();
if (GriddedElevationsResponse.ResultStatus != RequestErrorStatus.OK)
{
_log.LogError($"Tile.({TileX},{TileY}) Unable to obtain data for gridded data. GriddedElevationRequestResponse: {GriddedElevationsResponse.ResultStatus.ToString()}");
return(BuildEmptyTile());
}
ElevData.HasData = !float.IsPositiveInfinity(task.MinElevation); // check for data
// Developer Debugging Only
if (ElevData.HasData)
{
OutputDebugTile("Raw");
}
if (!ElevData.HasData)
{
return(BuildEmptyTile());
}
_log.LogInformation($"#Tile#.({TileX},{TileY}) Data successfully sampled. GridSize:{TileGridSize} Min:{task.MinElevation}, Max:{task.MaxElevation} FirstElev:{GriddedElevDataArray[0, 0].Elevation}, LastElev:{GriddedElevDataArray[TileGridSize - 1, TileGridSize - 1].Elevation}");
ElevData.HasLighting = HasLighting;
// Transform gridded data into a format the mesh builder can use
ConvertGridToDEM(task.MinElevation, task.MaxElevation);
// Build a quantized mesh from sampled elevations
QMTileBuilder tileBuilder = new QMTileBuilder()
{
TileData = ElevData, GridSize = TileGridSize
};
_log.LogInformation($"Tile.({TileX},{TileY}) BuildQuantizedMeshTile. GridSize:{TileGridSize} Min:{ElevData.MinimumHeight}, Max:{ElevData.MaximumHeight}");
if (!tileBuilder.BuildQuantizedMeshTile())
{
_log.LogError($"Tile.({TileX},{TileY}) BuildQuantizedMeshTile returned false with error code: {tileBuilder.BuildTileFaultCode}");
return(false);
}
QMTileResponse.data = tileBuilder.QuantizedMeshTile; // Make tile from mesh
ResultStatus = RequestErrorStatus.OK;
QMTileResponse.ResultStatus = ResultStatus;
_log.LogDebug($"#Tile#.({TileX},{TileY}) Execute End. Returning production tile. CesiumY:{yFlip}, Zoom:{TileZ}, GridSize:{TileGridSize}");
return(true);
}
catch (Exception ex)
{
_log.LogError(ex, $"#Tile#.({TileX},{TileY}). Exception building QuantizedMesh tile: ");
return(false);
}
}
