GameObject LoadGltf(List <string> warnings)
{
// This is intended to be identical to using GltfModelBuilder, except synchronous.
GameObject go;
bool fromPoly = (m_Location.GetLocationType() == Location.Type.PolyAssetId);
string localPath = m_Location.AbsolutePath;
string assetLocation = Path.GetDirectoryName(localPath);
// Synchronous, so don't use slow image loading
var loader = new TiltBrushUriLoader(localPath, assetLocation, loadImages: false);
try
{
ImportGltf.GltfImportResult result = ImportGltf.Import(
localPath, loader,
new ImportMaterialCollector(assetLocation, uniqueSeed: localPath),
fromPoly ? kPolyGltfImportOptions : kGltfImportOptions);
go = result.root;
m_ImportMaterialCollector = (ImportMaterialCollector)result.materialCollector;
}
catch (Exception ex)
{
m_LoadError = new LoadError("Invalid data", ex.Message);
go = null;
m_AllowExport = false;
Debug.LogException(ex);
}
m_AllowExport = (go != null);
return(go);
}
protected override GameObject DoUnityThreadWork(IDisposable state__,
out IEnumerable <Null> meshEnumerable,
out ImportMaterialCollector
importMaterialCollector)
{
meshEnumerable = null;
importMaterialCollector = null;
GameObject rootObject = null;
using (IDisposable state_ = state__)
{
var state = state_ as ImportGltf.ImportState;
if (state != null)
{
string assetLocation = Path.GetDirectoryName(m_localPath);
// EndImport doesn't try to use the loadImages functionality of UriLoader anyway.
// It knows it's on the main thread, so chooses to use Unity's fast loading.
var loader = new TiltBrushUriLoader(m_localPath, assetLocation, loadImages: false);
ImportGltf.GltfImportResult result =
ImportGltf.EndImport(
state, loader,
new ImportMaterialCollector(assetLocation, uniqueSeed: m_localPath),
out meshEnumerable);
if (result != null)
{
rootObject = result.root;
importMaterialCollector = (ImportMaterialCollector)result.materialCollector;
}
}
}
IsValid = (rootObject != null);
return(rootObject);
}
public FbxReader(string path)
{
m_standardMaterial = ModelCatalog.m_Instance.m_ObjLoaderStandardMaterial;
m_transparentMaterial = ModelCatalog.m_Instance.m_ObjLoaderTransparentMaterial;
m_path = path;
m_dir = Path.GetDirectoryName(path);
m_collector = new ImportMaterialCollector(m_dir, m_path);
}
/// Load model using FBX SDK.
GameObject LoadFbx(List <string> warningsOut)
{
#if !FBX_SUPPORTED
m_LoadError = new LoadError("fbx not supported");
return(null);
#else
try {
var reader = new FbxReader(m_Location.AbsolutePath);
var(gameObject, warnings, collector) = reader.Import();
warningsOut.AddRange(warnings);
m_ImportMaterialCollector = collector;
m_AllowExport = (m_ImportMaterialCollector != null);
return(gameObject);
} catch (Exception ex) {
m_LoadError = new LoadError("Invalid data", ex.Message);
m_AllowExport = false;
Debug.LogException(ex);
return(null);
}
#endif
}
// Performs whatever portion of the import process that is left.
//
// Pass:
// state - the value returned from DoBackgroundThreadWork. Ownership is transferred;
// callee is responsible for Disposing it.
// Returns:
// GameObject - the root of the object hierarchy.
// ImportMaterialCollector - the materials that were created, and info about them
// IEnumerable<Null> - a coroutine that will be pumped to completion
protected abstract GameObject DoUnityThreadWork(
IDisposable state,
out IEnumerable <Null> meshCreator,
out ImportMaterialCollector importMaterialCollector);
/// Returns:
/// bool - false if incomplete, true upon successful completion.
/// GameObject - caller should check output GameObject to determine success.
/// ImportMaterialCollector - non-null upon successful completion.
/// Raises an exception on unsuccessful completion.
public bool TryEndAsyncLoad(out GameObject root,
out ImportMaterialCollector importMaterialCollector)
{
// Three things happen in this function.
// 1: It waits to try and get the result of reading the model on a background thread
// 2: It checks the rate limiter to make sure we don't have too many of these going on at once.
// 3: It enumerates through, creating meshes for the model. These are time-limited so that
// it will stop if it has taken too long in a single frame.
root = null;
importMaterialCollector = null;
if (m_meshEnumerator == null)
{
IDisposable state;
if (!m_stateReader.TryGetResult(out state))
{
return(false);
}
IEnumerable <Null> enumerable;
m_root = DoUnityThreadWork(state, out enumerable, out m_ImportMaterialCollector);
// TODO: Possible bugs if DoUnityThreadWork ever did fail:
// We assume the invariant that (root == null) == (IsValid == false)
// We assume the invariant that m_ImportMaterialCollector != null
// We don't dispose the GameObject or the enumerable
// If the user calls TryEndAsyncLoad again we might try to call DoUnityThreadWork again
if (m_root == null)
{
return(false);
}
m_meshEnumerator = enumerable.GetEnumerator();
m_root.SetActive(false);
}
// Yield until the limiter unblocks.
// Multiple calls to TryGetResult above are harmless.
if (sm_Limiter.IsBlocked())
{
return(false);
}
// Finish constructing the actual game object.
Stopwatch stopwatch = new Stopwatch();
stopwatch.Start();
long numTicks = (long)((Stopwatch.Frequency * kMeshMsPerFrame) / 1000);
while (true)
{
if (!m_meshEnumerator.MoveNext())
{
m_root.SetActive(true);
root = m_root;
importMaterialCollector = m_ImportMaterialCollector;
stopwatch.Stop();
return(true);
}
if (stopwatch.ElapsedTicks > numTicks)
{
stopwatch.Stop();
return(false);
}
}
}
