// Creates ancestors, but note that this method does not apply visibility, since it was
// designed to create bones, which cannot have visibility opinions in USD.
static void CreateAncestors(SdfPath path,
PrimMap map,
GameObject unityRoot,
SdfPath usdRoot,
SceneImportOptions options,
out GameObject parentGo)
{
var parentPath = path.GetParentPath();
if (path == parentPath)
{
Debug.LogException(new Exception("Parent path was identical to current path: " + path.ToString()));
parentGo = null;
return;
}
if (map.TryGetValue(parentPath, out parentGo) && parentGo)
{
return;
}
// Base case.
if (parentPath == usdRoot)
{
map[parentPath] = unityRoot;
return;
}
if (parentPath == kAbsoluteRootPath)
{
// Something went wrong.
Debug.LogException(new Exception(
"Error: unexpected path </> creating ancestors for <" + usdRoot.ToString() + ">"));
}
// Recursive case.
// First, get the grandparent (parent's parent).
GameObject grandparentGo;
CreateAncestors(parentPath, map, unityRoot, usdRoot, options, out grandparentGo);
if (!grandparentGo)
{
Debug.LogError("Failed to find ancestor for " + parentPath);
return;
}
// Then find/create the current parent.
parentGo = FindOrCreateGameObject(grandparentGo.transform,
parentPath,
unityRoot.transform,
map,
options);
}
public static void WriteSparseOverrides(Scene scene,
PrimMap primMap,
BasisTransformation changeHandedness,
float tolerance = 0.0001f)
{
var oldMode = scene.WriteMode;
scene.WriteMode = Scene.WriteModes.Over;
try
{
foreach (var path in scene.Find <XformableSample>())
{
GameObject go;
if (!primMap.TryGetValue(path, out go))
{
continue;
}
var tx = go.transform;
var xfNew = XformSample.FromTransform(tx);
var xfOld = new XformSample();
scene.Read(path, xfOld);
bool areClose = true;
for (int i = 0; i < 16; i++)
{
if (Mathf.Abs(xfNew.transform[i] - xfOld.transform[i]) > tolerance)
{
areClose = false;
break;
}
}
if (areClose)
{
continue;
}
if (changeHandedness == BasisTransformation.SlowAndSafe)
{
xfNew.ConvertTransform();
}
scene.Write(path, xfNew);
}
}
finally
{
scene.WriteMode = oldMode;
}
}
/// <summary>
/// Given an array of bone names (HierInfo.skelJoints), creates GameObjects under unityRoot.
/// </summary>
static void ExpandSkeleton(HierInfo info,
GameObject unityRoot,
SdfPath usdRoot,
UsdPrim prim,
PrimMap map,
SceneImportOptions options)
{
foreach (var joint in info.skelJoints)
{
var path = joint;
GameObject parentGo = null;
if (!map.TryGetValue(path.GetParentPath(), out parentGo))
{
// This will happen when the joints are discontinuous, for example:
//
// Foo/Bar
// Foo/Bar/Baz/Qux
//
// Baz is implicitly defined, which is allowed by UsdSkel.
CreateAncestors(path, map, unityRoot, usdRoot, options, out parentGo);
if (!parentGo)
{
Debug.LogException(new Exception("Failed to create ancestors for " + path + " for prim: " +
prim.GetPath()));
continue;
}
}
Transform child = parentGo.transform.Find(path.GetName());
if (!child)
{
child = new GameObject(path.GetName()).transform;
child.SetParent(parentGo.transform, worldPositionStays: false);
}
map[path] = child.gameObject;
}
}
static void ProcessPaths(HierInfo[] infos,
Scene scene,
GameObject unityRoot,
SdfPath usdRoot,
PrimMap map,
SceneImportOptions options)
{
Profiler.BeginSample("Process all paths");
foreach (var info in infos)
{
var prim = info.prim;
var path = info.prim.GetPath();
if (info.skelBindings != null)
{
// Collect all discovered skelBindings back into the PrimMap.
map.SkelBindings.Add(info.prim.GetPath(), info.skelBindings);
}
GameObject go;
if (path == usdRoot)
{
go = unityRoot;
}
else
{
GameObject parentGo = null;
CreateAncestors(path, map, unityRoot, usdRoot, options, out parentGo);
if (!parentGo)
{
Debug.LogWarning("Parent path not found for child: " + path.ToString());
continue;
}
var parent = parentGo ? parentGo.transform : null;
if (!map.TryGetValue(path, out go))
{
go = FindOrCreateGameObject(parent,
path,
unityRoot.transform,
map,
options);
}
}
if (options.importSceneInstances)
{
Profiler.BeginSample("Add Scene Instance Root");
if (prim.IsInstance())
{
map.AddInstanceRoot(prim.GetPath(), go, prim.GetMaster().GetPath());
}
Profiler.EndSample();
}
if (!options.importHierarchy)
{
continue;
}
ApplySelfVisibility(go, prim);
try {
Profiler.BeginSample("Add Model Root");
AddModelRoot(go, info);
Profiler.EndSample();
Profiler.BeginSample("Add Variant Set");
AddVariantSet(go, prim);
Profiler.EndSample();
Profiler.BeginSample("Add Payload");
AddPayload(go, info, options);
Profiler.EndSample();
} catch (Exception ex) {
Debug.LogException(new Exception("Error processing " + prim.GetPath(), ex));
}
}
Profiler.EndSample();
}
public static void BuildPointInstances(Scene scene,
PrimMap primMap,
string pointInstancerPath,
PointInstancerSample sample,
GameObject root,
SceneImportOptions options)
{
Matrix4x4[] transforms = sample.ComputeInstanceMatrices(scene, pointInstancerPath);
int i = 0;
foreach (var protoRoot in sample.prototypes.targetPaths)
{
GameObject go;
if (!primMap.TryGetValue(new pxr.SdfPath(protoRoot), out go))
{
Debug.LogWarning("Proto not found in PrimMap: " + protoRoot);
continue;
}
go.SetActive(false);
if (options.enableGpuInstancing)
{
EnableGpuInstancing(go);
}
}
var inactiveIds = new System.Collections.Generic.HashSet <long>();
/*
* Disabled until this bug is resolved:
* https://github.com/PixarAnimationStudios/USD/issues/639
*
* if (sample.inactiveIds != null) {
* foreach (long id in sample.inactiveIds.GetExplicitItems()) {
* inactiveIds.Add(id);
* }
* }
*/
foreach (var index in sample.protoIndices)
{
if (inactiveIds.Contains(index))
{
continue;
}
if (index >= sample.prototypes.targetPaths.Length)
{
Debug.LogWarning("ProtoIndex out of bounds: [" + index + "] " +
"for instancer: " + pointInstancerPath);
continue;
}
var targetPath = sample.prototypes.targetPaths[index];
GameObject goMaster;
if (!primMap.TryGetValue(new pxr.SdfPath(targetPath), out goMaster))
{
Debug.LogWarning("Proto not found in PrimMap: " + targetPath);
continue;
}
if (i >= transforms.Length)
{
Debug.LogWarning("No transform for instance index [" + i + "] " +
"for instancer: " + pointInstancerPath);
break;
}
var xf = transforms[i];
var goInstance = GameObject.Instantiate(goMaster, root.transform);
goInstance.SetActive(true);
goInstance.name = goMaster.name + "_" + i;
XformImporter.BuildXform(xf, goInstance, options);
i++;
}
}
