/// <summary>
/// Map all UsdPrims and build Unity GameObjects, reconstructing the parent relationship.
/// </summary>
/// <remarks>
/// When forceRebuild is true, game objects will be destroyed and recreated. If buildHierarchy
/// is false, the primMap will be populated, but missing game objects will not be created.
/// </remarks>
static public PrimMap BuildGameObjects(Scene scene,
GameObject unityRoot,
SdfPath usdRoot,
IEnumerable <SdfPath> paths,
PrimMap map,
SceneImportOptions options)
{
map[usdRoot] = unityRoot;
// Like all GameObjects imported from USD, ensure the root has a UsdPrimSource.
if (unityRoot.GetComponent <UsdPrimSource>() == null)
{
var ua = unityRoot.AddComponent <UsdPrimSource>();
ua.m_usdPrimPath = usdRoot.ToString();
}
Profiler.BeginSample("Build Object Lists");
var hierInfo = BuildObjectLists(scene, unityRoot, usdRoot, map, options);
Profiler.EndSample();
// TODO: Should recurse to discover deeply nested instancing.
// TODO: Generates garbage for every prim, but we expect few masters.
if (options.importPointInstances || options.importSceneInstances)
{
Profiler.BeginSample("Build Masters");
foreach (var masterRootPrim in scene.Stage.GetMasters())
{
var goMaster = FindOrCreateGameObject(unityRoot.transform,
masterRootPrim.GetPath(),
unityRoot.transform,
map,
options);
goMaster.hideFlags = HideFlags.HideInHierarchy;
goMaster.SetActive(false);
map.AddMasterRoot(masterRootPrim.GetPath(), goMaster);
try {
var info = new HierInfo();
info.prim = masterRootPrim;
ReadModelInfo(ref info);
AddModelRoot(goMaster, info);
AddVariantSet(goMaster, masterRootPrim);
} catch (Exception ex) {
Debug.LogException(new Exception("Error processing " + masterRootPrim.GetPath(), ex));
}
foreach (var usdPrim in masterRootPrim.GetDescendants())
{
var parentPath = usdPrim.GetPath().GetParentPath();
Transform parentXf = null;
if (parentPath == masterRootPrim.GetPath())
{
parentXf = goMaster.transform;
}
else
{
parentXf = map[parentPath].transform;
}
var goPrim = FindOrCreateGameObject(parentXf,
usdPrim.GetPath(),
unityRoot.transform,
map,
options);
ApplySelfVisibility(goPrim, usdPrim);
if (usdPrim.IsInstance())
{
map.AddInstanceRoot(usdPrim.GetPath(), goPrim, usdPrim.GetMaster().GetPath());
}
try {
var info = new HierInfo();
info.prim = usdPrim;
ReadModelInfo(ref info);
AddModelRoot(goPrim, info);
AddVariantSet(goPrim, usdPrim);
} catch (Exception ex) {
Debug.LogException(new Exception("Error processing " + usdPrim.GetPath(), ex));
continue;
}
}
}
Profiler.EndSample();
}
if (options.importSkinning)
{
Profiler.BeginSample("Expand Skeletons");
foreach (var info in hierInfo)
{
if (info.skelJoints == null || info.skelJoints.Length == 0)
{
continue;
}
try {
ExpandSkeleton(info, unityRoot, usdRoot, info.prim, map, options);
} catch (Exception ex) {
Debug.LogException(new Exception("Error expanding skeleton at " + info.prim.GetPath(), ex));
}
}
Profiler.EndSample();
}
return(map);
}
