private string gltfToJson(GLTF gltf)
{
var jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings());
var sb = new StringBuilder();
var sw = new StringWriter(sb, CultureInfo.InvariantCulture);
// Do not use the optimized writer because it's not necessary to truncate values
// Use the bounded writer in case some values are infinity ()
using (var jsonWriter = new JsonTextWriterBounded(sw))
{
jsonWriter.Formatting = Formatting.None;
jsonSerializer.Serialize(jsonWriter, gltf);
}
return(sb.ToString());
}
public void ExportGltf(BabylonScene babylonScene, string outputFile, bool generateBinary)
{
RaiseMessage("GLTFExporter | Export outputFile=" + outputFile + " generateBinary=" + generateBinary);
RaiseMessage("GLTFExporter | Exportation started", Color.Blue);
float progressionStep;
var progression = 0.0f;
ReportProgressChanged((int)progression);
// Initialization
initBabylonNodes(babylonScene);
babylonMaterialsToExport = new List <BabylonMaterial>();
var gltf = new GLTF(Path.GetDirectoryName(outputFile));
// Asset
gltf.asset = new GLTFAsset
{
version = "2.0",
generator = "Babylon2Gltf2017",
copyright = "2017 (c) BabylonJS"
// no minVersion
};
// Scene
gltf.scene = 0;
// Scenes
GLTFScene scene = new GLTFScene();
GLTFScene[] scenes = { scene };
gltf.scenes = scenes;
// Meshes
RaiseMessage("GLTFExporter | Exporting meshes");
progression = 10.0f;
ReportProgressChanged((int)progression);
progressionStep = 40.0f / babylonScene.meshes.Length;
foreach (var babylonMesh in babylonScene.meshes)
{
ExportMesh(babylonMesh, gltf, babylonScene);
progression += progressionStep;
ReportProgressChanged((int)progression);
CheckCancelled();
}
// Root nodes
RaiseMessage("GLTFExporter | Exporting nodes");
List <BabylonNode> babylonRootNodes = babylonNodes.FindAll(node => node.parentId == null);
progressionStep = 40.0f / babylonRootNodes.Count;
babylonRootNodes.ForEach(babylonNode =>
{
exportNodeRec(babylonNode, gltf, babylonScene);
progression += progressionStep;
ReportProgressChanged((int)progression);
CheckCancelled();
});
// TODO - Choose between this method and the reverse of X axis
// Switch from left to right handed coordinate system
RaiseMessage("GLTFExporter | Exporting root node");
var tmpNodesList = new List <int>(scene.NodesList);
var rootNode = new BabylonMesh
{
name = "root",
rotation = new float[] { 0, (float)Math.PI, 0 },
scaling = new float[] { 1, 1, -1 },
idGroupInstance = -1
};
scene.NodesList.Clear();
GLTFNode gltfRootNode = ExportAbstractMesh(rootNode, gltf, null);
gltfRootNode.ChildrenList.AddRange(tmpNodesList);
// Materials
RaiseMessage("GLTFExporter | Exporting materials");
foreach (var babylonMaterial in babylonMaterialsToExport)
{
ExportMaterial(babylonMaterial, gltf);
CheckCancelled();
}
;
RaiseMessage(string.Format("GLTFExporter | Nb materials exported: {0}", gltf.MaterialsList.Count), Color.Gray, 1);
// Output
RaiseMessage("GLTFExporter | Saving to output file");
// Cast lists to arrays
gltf.Prepare();
var jsonSerializer = JsonSerializer.Create(new JsonSerializerSettings());
var sb = new StringBuilder();
var sw = new StringWriter(sb, CultureInfo.InvariantCulture);
// Do not use the optimized writer because it's not necessary to truncate values
// Use the bounded writer in case some values are infinity ()
using (var jsonWriter = new JsonTextWriterBounded(sw))
{
jsonWriter.Formatting = Formatting.None;
jsonSerializer.Serialize(jsonWriter, gltf);
}
string outputGltfFile = Path.ChangeExtension(outputFile, "gltf");
File.WriteAllText(outputGltfFile, sb.ToString());
// Binary
if (generateBinary)
{
// TODO - Export glTF data to binary format .glb
RaiseError("GLTFExporter | TODO - Generating binary files");
}
ReportProgressChanged(100);
}
