internal void ExportVisualTopoToGLB(VisualTopoModel visualTopoModel, DEMDataSet dataset, string outputFile, bool drawOnTexture, float marginMeters, float zFactor, ImageryProvider imageryProvider)
{
int outputSrid = 3857;
float lineWidth = 1.0F;
int numTilesPerImage = 4;
BoundingBox bbox = visualTopoModel.BoundingBox // relative coords
.Translate(visualTopoModel.EntryPoint.Longitude, visualTopoModel.EntryPoint.Latitude, visualTopoModel.EntryPoint.Elevation ?? 0) // absolute coords
.Pad(marginMeters) // margin around model
.ReprojectTo(visualTopoModel.SRID, dataset.SRID); // DEM coords
//=======================
// Height map (get dem elevation for bbox)
//
// Get height map
// Note that ref Bbox means that the bbox will be adjusted to match DEM data
var heightMap = elevationService.GetHeightMap(ref bbox, dataset, downloadMissingFiles: true);
var bboxTerrainSpace = bbox.ReprojectTo(dataset.SRID, outputSrid); // terrain coords
// Model origin
GeoPoint axisOriginWorldSpace = visualTopoModel.EntryPoint.ReprojectTo(visualTopoModel.SRID, outputSrid)
.CenterOnOrigin(bboxTerrainSpace);
Vector3 axisOriginModelSpace = visualTopoModel.EntryPoint.AsVector3();
//await signalR.ReportGenerateProgressAsync(signalRConnectionId, "Getting GPX extent elevation...", 20);
//=======================
// Local transform function from model coordinates (relative to entry, in meters)
// and global coordinates absolute in final 3D model space
//
IEnumerable <GeoPoint> TransformLine(IEnumerable <GeoPoint> line)
{
var newLine = line.Translate(visualTopoModel.EntryPoint) // Translate to entry (=> global topo coord space)
.ReprojectTo(visualTopoModel.SRID, outputSrid) // Reproject to terrain coord space
.CenterOnOrigin(bboxTerrainSpace) // Center on terrain space origin
.CenterOnOrigin(axisOriginWorldSpace);
return(newLine);
};
//=======================
// 3D model
//
var gltfModel = sharpGltfService.CreateNewModel();
// Add X/Y/Z axis on entry point
var axis = meshService.CreateAxis();
sharpGltfService.AddMesh(gltfModel, "Axis", axis, doubleSided: false);
int i = 0;
var triangulation = visualTopoModel.TriangulationFull3D.Clone()
.Translate(axisOriginModelSpace) // already zScaled if zFactor > 1
.ReprojectTo(visualTopoModel.SRID, outputSrid)
.CenterOnOrigin(bboxTerrainSpace)
.CenterOnOrigin(axisOriginWorldSpace.AsVector3());
gltfModel = sharpGltfService.AddMesh(gltfModel, "Cavite3D", triangulation, VectorsExtensions.CreateColor(0, 255, 0), doubleSided: false);
////=======================
//// 3D cavity model
//foreach (var line in visualTopoModel.Topology3D) // model.Topology3D is the graph of topo paths
//{
// // Add line to model
// gltfModel = sharpGltfService.AddLine(gltfModel
// , string.Concat("CavitySection", i++) // name of 3D node
// , TransformLine(line) // call transform function
// , color: VectorsExtensions.CreateColor(255, 0, 0, 128)
// , lineWidth);
//}
// Reproject and center height map coordinates
heightMap = heightMap.ReprojectTo(dataset.SRID, outputSrid)
.CenterOnOrigin(bboxTerrainSpace)
.ZScale(zFactor)
.CenterOnOrigin(axisOriginWorldSpace);
//=======================
// Textures
//
PBRTexture pbrTexture = null;
if (imageryProvider != null)
{
TileRange tiles = imageryService.DownloadTiles(bbox, imageryProvider, numTilesPerImage);
string fileName = Path.Combine(Path.GetDirectoryName(outputFile), "Texture.jpg");
Console.WriteLine("Construct texture...");
TextureInfo texInfo = null;
if (drawOnTexture)
{
var topoTexture = visualTopoModel.Topology3D.SelectMany(l => l).Translate(visualTopoModel.EntryPoint).ReprojectTo(visualTopoModel.SRID, 4326);
texInfo = imageryService.ConstructTextureWithGpxTrack(tiles, bbox, fileName, TextureImageFormat.image_jpeg
, topoTexture, drawGpxVertices: true);
}
else
{
texInfo = imageryService.ConstructTexture(tiles, bbox, fileName, TextureImageFormat.image_jpeg);
}
pbrTexture = PBRTexture.Create(texInfo, null);
}
//
//=======================
gltfModel = sharpGltfService.AddTerrainMesh(gltfModel, heightMap, pbrTexture);
gltfModel.SaveGLB(outputFile);
}
/// <summary>
/// Generates a VisualTopo file 3D model
/// </summary>
/// <remarks>LT* (Lambert Carto) projections are not supported and could produce imprecise results (shifted by +10meters)</remarks>
/// <param name="vtopoFile">VisualTopo .TRO file</param>
/// <param name="imageryProvider">Imagery provider for terrain texture. Set to null for untextured model</param>
/// <param name="bboxMarginMeters">Terrain margin (meters) around VisualTopo model</param>
public void Run_3DModelGeneration(string vtopoFile, ImageryProvider imageryProvider, float bboxMarginMeters = 1000, bool generateTopoOnlyModel = false, float zFactor = 1f)
{
try
{
//=======================
// Generation params
//
int outputSRID = 3857; // Output SRID
float lineWidth = 1.0F; // Topo lines width (meters)
var dataset = DEMDataSet.AW3D30; // DEM dataset for terrain and elevation
int TEXTURE_TILES = 8; // Texture quality (number of tiles for bigger side) 4: med, 8: high, 12: ultra
string outputDir = Directory.GetCurrentDirectory();
bool GENERATE_LINE3D = false;
//=======================
// Open and parse file
//
// model will have available properties
// => Graph (nodes/arcs)
// => BoundingBox
// => Topology3D -> list of point-to-point lines
// => SRID of model file
StopwatchLog timeLog = StopwatchLog.StartNew(_logger);
VisualTopoModel model = _visualTopoService.LoadFile(vtopoFile, Encoding.GetEncoding("ISO-8859-1")
, decimalDegrees: true
, ignoreRadialBeams: true
, zFactor);
timeLog.LogTime($"Loading {vtopoFile} model file");
// for debug,
//var b = GetBranches(model); // graph list of all nodes
//var lowestPoint = model.Sets.Min(s => s.Data.Min(d => d.GlobalGeoPoint?.Elevation ?? 0));
BoundingBox bbox = model.BoundingBox // relative coords
.Translate(model.EntryPoint.Longitude, model.EntryPoint.Latitude, model.EntryPoint.Elevation ?? 0) // absolute coords
.Pad(bboxMarginMeters) // margin around model
.ReprojectTo(model.SRID, dataset.SRID); // DEM coords
// Get height map
// Note that ref Bbox means that the bbox will be adjusted to match DEM data
var heightMap = _elevationService.GetHeightMap(ref bbox, dataset, downloadMissingFiles: true);
var bboxTerrainSpace = bbox.ReprojectTo(dataset.SRID, outputSRID); // terrain coords
timeLog.LogTime("Terrain height map");
//=======================
// Get entry elevation (need to reproject to DEM coordinate system first)
// and sections entry elevations
//
_visualTopoService.ComputeFullCavityElevations(model, dataset, zFactor); // will add TerrainElevationAbove and entry elevations
_visualTopoService.Create3DTriangulation(model);
timeLog.LogTime("Cavity points elevation");
// Model origin
GeoPoint axisOriginWorldSpace = model.EntryPoint.ReprojectTo(model.SRID, outputSRID)
.CenterOnOrigin(bboxTerrainSpace);
Vector3 axisOriginModelSpace = model.EntryPoint.AsVector3();
//=======================
// Local transform function from model coordinates (relative to entry, in meters)
// and global coordinates absolute in final 3D model space
//
IEnumerable <GeoPoint> TransformLine(IEnumerable <GeoPoint> line)
{
var newLine = line.Translate(model.EntryPoint) // Translate to entry (=> global topo coord space)
.ReprojectTo(model.SRID, outputSRID) // Reproject to terrain coord space
.CenterOnOrigin(bboxTerrainSpace) // Center on terrain space origin
.CenterOnOrigin(axisOriginWorldSpace);
return(newLine);
};
//=======================
// 3D model
//
var gltfModel = _gltfService.CreateNewModel();
// Add X/Y/Z axis on entry point
var axis = _meshService.CreateAxis();
_gltfService.AddMesh(gltfModel, "Axis", axis, doubleSided: false);
int i = 0;
var triangulation = model.TriangulationFull3D.Clone()
.Translate(axisOriginModelSpace) // already zScaled if zFactor > 1
.ReprojectTo(model.SRID, outputSRID)
.CenterOnOrigin(bboxTerrainSpace)
.CenterOnOrigin(axisOriginWorldSpace.AsVector3());
gltfModel = _gltfService.AddMesh(gltfModel, "Cavite3D", model.TriangulationFull3D, VectorsExtensions.CreateColor(0, 255, 0), doubleSided: false);
if (GENERATE_LINE3D)
{
foreach (var line in model.Topology3D) // model.Topology3D is the graph of topo paths
{
// Add line to model
gltfModel = _gltfService.AddLine(gltfModel
, string.Concat("GPX", i++) // name of 3D node
, TransformLine(line) // call transform function
, color: VectorsExtensions.CreateColor(255, 0, 0, 128)
, lineWidth);
}
}
timeLog.LogTime("Topo 3D model");
//axis = _meshService.CreateAxis(10,100);
//_gltfService.AddMesh(gltfModel, "Axis", axis, doubleSided: false);
if (generateTopoOnlyModel)
{
// Uncomment this to save 3D model for topo only (without terrain)
gltfModel.SaveGLB(string.Concat(Path.GetFileNameWithoutExtension(vtopoFile) + $"Z{zFactor}_TopoOnly.glb"));
}
// Reproject and center height map coordinates
heightMap = heightMap.ReprojectTo(dataset.SRID, outputSRID)
.CenterOnOrigin(bboxTerrainSpace)
.ZScale(zFactor)
.CenterOnOrigin(axisOriginWorldSpace);
//.BakeCoordinates();
timeLog.LogTime("Height map transform");
//=======================
// Textures
//
PBRTexture pbrTexture = null;
if (imageryProvider != null)
{
TileRange tiles = _imageryService.DownloadTiles(bbox, imageryProvider, TEXTURE_TILES);
string fileName = Path.Combine(outputDir, "Texture.jpg");
timeLog.LogTime("Imagery download");
Console.WriteLine("Construct texture...");
//TextureInfo texInfo = _imageryService.ConstructTexture(tiles, bbox, fileName, TextureImageFormat.image_jpeg);
var topoTexture = model.Topology3D.SelectMany(l => l).Translate(model.EntryPoint).ReprojectTo(model.SRID, 4326);
TextureInfo texInfo = _imageryService.ConstructTextureWithGpxTrack(tiles, bbox, fileName, TextureImageFormat.image_jpeg
, topoTexture, false);
pbrTexture = PBRTexture.Create(texInfo, null);
timeLog.LogTime("Texture creation");
}
//
//=======================
// Triangulate height map
_logger.LogInformation($"Triangulating height map and generating 3D mesh...");
gltfModel = _gltfService.AddTerrainMesh(gltfModel, heightMap, pbrTexture);
gltfModel.SaveGLB(string.Concat(Path.GetFileNameWithoutExtension(vtopoFile) + $"Z{zFactor}.glb"));
timeLog.LogTime("3D model");
}
catch (Exception ex)
{
_logger.LogError("Error :" + ex.Message);
}
}