public virtual void ImportParametersFromUsd(Scene scene,
string materialPath,
MaterialSample materialSample,
PreviewSurfaceSample previewSurf,
SceneImportOptions options)
{
var primvars = new List <string>();
string uvPrimvar = null;
ImportColorOrMap(scene, previewSurf.diffuseColor, false, options, ref DiffuseMap, ref Diffuse, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportColorOrMap(scene, previewSurf.emissiveColor, false, options, ref EmissionMap, ref Emission, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportValueOrMap(scene, previewSurf.normal, true, options, ref NormalMap, ref Normal, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportValueOrMap(scene, previewSurf.displacement, false, options, ref DisplacementMap, ref Displacement, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportValueOrMap(scene, previewSurf.occlusion, false, options, ref OcclusionMap, ref Occlusion, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportValueOrMap(scene, previewSurf.roughness, false, options, ref RoughnessMap, ref Roughness, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ImportValueOrMap(scene, previewSurf.clearcoat, false, options, ref ClearcoatMap, ref Clearcoat, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
ClearcoatRoughness = previewSurf.clearcoatRoughness.defaultValue;
if (previewSurf.useSpecularWorkflow.defaultValue == 1)
{
ImportColorOrMap(scene, previewSurf.specularColor, false, options, ref SpecularMap, ref Specular, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
}
else
{
ImportValueOrMap(scene, previewSurf.metallic, false, options, ref MetallicMap, ref Metallic, out uvPrimvar);
MergePrimvars(uvPrimvar, primvars);
}
options.materialMap.SetPrimvars(materialPath, primvars);
}
/// <summary>
/// Optimizes the given import options for fast playback. This assumes that the asset was
/// previously imported, therefore it disables import of the material and scene hierarchy.
/// </summary>
public static void PrepOptionsForTimeChange(ref SceneImportOptions options)
{
options.forceRebuild = false;
options.materialImportMode = MaterialImportMode.None;
options.meshOptions.debugShowSkeletonBindPose = false;
options.meshOptions.debugShowSkeletonRestPose = false;
options.meshOptions.generateLightmapUVs = false;
options.importSkinWeights = false;
// Note that tangent and Normals must be updated when the mesh deforms.
options.importHierarchy = false;
options.meshOptions.texcoord0 = ImportMode.Ignore;
options.meshOptions.texcoord1 = ImportMode.Ignore;
options.meshOptions.texcoord2 = ImportMode.Ignore;
options.meshOptions.texcoord3 = ImportMode.Ignore;
}
protected void ImportValueOrMap <T>(Scene scene,
Connectable <T> usdParam,
bool isNormalMap,
SceneImportOptions options,
ref Texture2D map,
ref T?value,
out string uvPrimvar) where T : struct
{
uvPrimvar = null;
if (usdParam.IsConnected())
{
map = MaterialImporter.ImportConnectedTexture(scene, usdParam, isNormalMap, options, out uvPrimvar);
}
else
{
value = usdParam.defaultValue;
}
}
public static void BuildSkeletonBone(string skelPath,
GameObject go,
Matrix4x4 restXform,
VtTokenArray joints,
SceneImportOptions importOptions)
{
// Perform change of basis, if needed.
XformImporter.ImportXform(ref restXform, importOptions);
// Decompose into TSR.
Vector3 pos = Vector3.zero;
Quaternion rot = Quaternion.identity;
Vector3 scale = Vector3.one;
if (!UnityTypeConverter.Decompose(restXform, out pos, out rot, out scale))
{
throw new Exception("Failed to decompose bind trnsforms for <" + skelPath + ">");
}
go.transform.localScale = scale;
go.transform.localRotation = rot;
go.transform.localPosition = pos;
var cubeDebugName = "usdSkel_restPose_debug_cube";
if (importOptions.meshOptions.debugShowSkeletonRestPose)
{
var cube = go.transform.Find(cubeDebugName);
if (!cube)
{
cube = GameObject.CreatePrimitive(PrimitiveType.Cube).transform;
cube.name = cubeDebugName;
cube.SetParent(go.transform, worldPositionStays: false);
cube.localScale = Vector3.one * 2;
}
}
else
{
var existing = go.transform.Find(cubeDebugName);
if (existing)
{
GameObject.DestroyImmediate(existing.gameObject);
}
}
}
/// <summary>
/// Computes the bound material using UsdShade's inherited binding logic.
/// If a material is bound, the request callback is executed to enable the caller to bind the
/// material to the Unity geometry.
/// </summary>
public static void ProcessMaterialBindings(Scene scene, SceneImportOptions importOptions)
{
var requests = importOptions.materialMap.ClearRequestedBindings();
var prims = new pxr.UsdPrimVector();
foreach (var pathAndRequest in requests)
{
var prim = scene.GetPrimAtPath(pathAndRequest.Key);
if (prim == null)
{
continue;
}
prims.Add(prim);
}
var matVector = pxr.UsdShadeMaterialBindingAPI.ComputeBoundMaterials(prims, materialBindToken);
var matIndex = -1;
foreach (pxr.UsdShadeMaterial usdMat in matVector)
{
matIndex++;
Material unityMat = importOptions.materialMap[usdMat.GetPath()];
if (unityMat == null)
{
continue;
}
// PERF: this is slow and garbage-y.
string meshPath = prims[matIndex].GetPath();
if (!requests.ContainsKey(meshPath))
{
Debug.LogError("Source object key not found: " + meshPath);
continue;
}
System.Collections.Generic.List <string> primvars
= importOptions.materialMap.GetPrimvars(usdMat.GetPath());
requests[meshPath](scene, unityMat, primvars);
}
}
public static void MenuImportAsPrefab()
{
var scene = InitForOpen();
if (scene == null)
{
return;
}
string path = scene.FilePath;
// Time-varying data is not supported and often scenes are written without "Default" time
// values, which makes setting an arbitrary time safer (because if only default was authored
// the time will be ignored and values will resolve to default time automatically).
scene.Time = 1.0;
var importOptions = new SceneImportOptions();
importOptions.projectAssetPath = GetSelectedAssetPath();
importOptions.changeHandedness = BasisTransformation.SlowAndSafe;
importOptions.materialImportMode = MaterialImportMode.ImportDisplayColor;
importOptions.usdRootPath = GetDefaultRoot(scene);
var invalidChars = Path.GetInvalidFileNameChars();
var prefabName = string.Join("_", GetPrefabName(path).Split(invalidChars,
System.StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
string prefabPath = importOptions.projectAssetPath + prefabName + ".prefab";
prefabPath = AssetDatabase.GenerateUniqueAssetPath(prefabPath);
string clipName = Path.GetFileNameWithoutExtension(path);
var go = new GameObject(GetObjectName(importOptions.usdRootPath, path));
try
{
UsdToGameObject(go, scene, importOptions);
SceneImporter.SavePrefab(go, prefabPath, clipName, importOptions);
}
finally
{
GameObject.DestroyImmediate(go);
scene.Close();
}
}
/// <summary>
/// Sets the variant selections in USD at the given prim path based on the selections parameter.
/// </summary>
/// <param name="go">The gameObject at the root of the variant set.</param>
/// <param name="usdPrimPath">The USD prim at which to set the variant selection.</param>
/// <param name="selections">A collection of (variant set, selection) pairs.</param>
/// <remarks>
/// A USD prim can have zero or more variant sets, for example a single prim amy have
/// "modelingVariant" and "shadingVariant" sets. Each set can have their own slection.
/// </remarks>
/// <example>
/// If two sets with selections are modelingVariant=CupWithHandle and shadingVariant=BrightBlue,
/// resulting in a bright blue cup with a handle. In this example, the selections dictionary
/// would contain:
/// { "modelingVariant" = "CupWithHandle",
/// "shadingVariant" = "BrightBlue" }
/// </example>
public void SetVariantSelection(GameObject go,
string usdPrimPath,
Dictionary <string, string> selections)
{
InitUsd.Initialize();
var scene = GetScene();
if (scene == null)
{
throw new Exception("Failed to open: " + usdFullPath);
}
var prim = scene.GetPrimAtPath(usdPrimPath);
if (prim == null || !prim)
{
throw new Exception("Prim not found: " + usdPrimPath);
}
var varSets = prim.GetVariantSets();
foreach (var sel in selections)
{
if (!varSets.HasVariantSet(sel.Key))
{
throw new Exception("Unknown varient set: " + sel.Key + " at " + usdPrimPath);
}
varSets.GetVariantSet(sel.Key).SetVariantSelection(sel.Value);
}
// TODO: sparsely remove prims, rather than blowing away all the children.
foreach (Transform child in go.transform)
{
GameObject.DestroyImmediate(child.gameObject);
}
SceneImportOptions importOptions = new SceneImportOptions();
this.StateToOptions(ref importOptions);
importOptions.usdRootPath = prim.GetPath();
SceneImporter.ImportUsd(go, scene, new PrimMap(), true, importOptions);
}
/// <summary>
/// If there is a Payload authored on this prim, expose it so the user can change the
/// load state.
/// </summary>
static void AddPayload(GameObject go, HierInfo info, SceneImportOptions options)
{
var pl = go.GetComponent <UsdPayload>();
if (!info.hasPayload)
{
if (pl)
{
Component.DestroyImmediate(pl);
}
return;
}
if (!pl)
{
pl = go.AddComponent <UsdPayload>();
pl.SetInitialState(options.payloadPolicy == PayloadPolicy.LoadAll);
}
}
public static GameObject ImportSceneAsGameObject(Scene scene, GameObject parent = null, SceneImportOptions importOptions = null)
{
if (scene == null || scene.Stage == null)
{
Debug.LogError("The USD Scene needs to be opened before being imported.");
return(null);
}
string path = scene.FilePath;
// Time-varying data is not supported and often scenes are written without "Default" time
// values, which makes setting an arbitrary time safer (because if only default was authored
// the time will be ignored and values will resolve to default time automatically).
scene.Time = 1.0;
if (importOptions == null)
{
importOptions = new SceneImportOptions();
importOptions.usdRootPath = GetDefaultRoot(scene);
}
GameObject root = new GameObject(GetObjectName(importOptions.usdRootPath, path));
if (parent != null)
{
root.transform.SetParent(parent.transform);
}
try
{
UsdToGameObject(root, scene, importOptions);
return(root);
}
catch (SceneImporter.ImportException)
{
#if UNITY_EDITOR
Object.DestroyImmediate(root);
#else
Object.Destroy(root);
#endif
return(null);
}
}
protected void ImportColorOrMap(Scene scene,
Connectable <Vector3> usdParam,
bool isNormalMap,
SceneImportOptions options,
ref Texture2D map,
ref Color?value,
out string uvPrimvar)
{
uvPrimvar = null;
if (usdParam.IsConnected())
{
map = MaterialImporter.ImportConnectedTexture(scene, usdParam, isNormalMap, options, out uvPrimvar);
}
else
{
var rgb = usdParam.defaultValue;
value = new Color(rgb.x, rgb.y, rgb.z).gamma;
}
}
public static void ImportUsd(GameObject goRoot,
Scene scene,
PrimMap primMap,
bool composingSubtree,
SceneImportOptions importOptions)
{
if (scene == null)
{
throw new ImportException("Null USD Scene");
}
scene.SetInterpolation(importOptions.interpolate ?
Scene.InterpolationMode.Linear :
Scene.InterpolationMode.Held);
SceneImporter.BuildScene(scene,
goRoot,
importOptions,
primMap,
composingSubtree);
}
static HierInfo[] BuildObjectLists(Scene scene,
GameObject unityRoot,
SdfPath usdRoot,
PrimMap map,
SceneImportOptions options)
{
if (map.SkelCache == null)
{
// Note that UsdSkelCache is thread safe and can be populated from multiple threads.
map.SkelCache = new UsdSkelCache();
// The skelBindings dictionary, however, is not thread safe and must be populated after the
// hierarchy discovery thread joins, in ProcessPaths.
map.SkelBindings = new Dictionary <SdfPath, UsdSkelBindingVector>();
}
BeginReading(scene, usdRoot, map, options).Complete();
ProcessPaths(ReadHierJob.result, scene, unityRoot, usdRoot, map, options);
return(ReadHierJob.result);
}
public static void MenuImportAsTimelineClip()
{
var scene = InitForOpen();
if (scene == null)
{
return;
}
string path = scene.FilePath;
var invalidChars = Path.GetInvalidFileNameChars();
var prefabName = string.Join("_", GetPrefabName(path).Split(invalidChars,
System.StringSplitOptions.RemoveEmptyEntries)).TrimEnd('.');
string prefabPath = GetSelectedAssetPath() + prefabName + ".prefab";
prefabPath = AssetDatabase.GenerateUniqueAssetPath(prefabPath);
string clipName = Path.GetFileNameWithoutExtension(path);
var importOptions = new SceneImportOptions();
importOptions.projectAssetPath = GetSelectedAssetPath();
importOptions.changeHandedness = BasisTransformation.FastWithNegativeScale;
importOptions.materialImportMode = MaterialImportMode.ImportDisplayColor;
importOptions.usdRootPath = GetDefaultRoot(scene);
var go = new GameObject(GetObjectName(importOptions.usdRootPath, path));
try
{
// Ensure we have at least one GameObject with the import settings.
XformImporter.BuildSceneRoot(scene, go.transform, importOptions);
SceneImporter.SavePrefab(go, prefabPath, clipName, importOptions);
}
finally
{
GameObject.DestroyImmediate(go);
}
}
/// <summary>
/// Copies the transform value from USD to Unity, optionally changing handedness in the
/// process.
/// </summary>
public static void BuildXform(pxr.SdfPath path,
XformableSample usdXf,
GameObject go,
SceneImportOptions options,
Scene scene)
{
// If there is an access mask and it's not initially being populated, check to see if the
// transform for this object actually varies over time, if not, we can simply return.
if (scene.AccessMask != null && !scene.IsPopulatingAccessMask)
{
System.Reflection.MemberInfo transformMember = null;
transformMember = usdXf.GetType().GetMember("transform")[0];
HashSet <System.Reflection.MemberInfo> members;
if (!scene.AccessMask.Included.TryGetValue(path, out members) ||
!members.Contains(transformMember))
{
return;
}
}
BuildXform(usdXf.transform, go, options);
}
/// <summary>
/// Rebuilds the USD scene as Unity GameObjects, maintaining a mapping from USD to Unity.
/// </summary>
public static PrimMap BuildScene(Scene scene,
GameObject root,
SceneImportOptions importOptions,
PrimMap primMap,
bool composingSubtree)
{
try {
Profiler.BeginSample("USD: Build Scene");
var builder = BuildScene(scene,
root,
importOptions,
primMap,
0,
composingSubtree);
while (builder.MoveNext())
{
}
return(primMap);
} finally {
Profiler.EndSample();
}
}
static void MenuExportLoadFromUsd()
{
var scene = InitForOpen();
if (scene == null)
{
return;
}
string path = scene.FilePath;
// Time-varying data is not supported and often scenes are written without "Default" time
// values, which makes setting an arbitrary time safer (because if only default was authored
// the time will be ignored and values will resolve to default time automatically).
scene.Time = 1.0;
var importOptions = new SceneImportOptions();
importOptions.projectAssetPath = GetSelectedAssetPath();
importOptions.changeHandedness = BasisTransformation.SlowAndSafe;
importOptions.materialImportMode = MaterialImportMode.ImportDisplayColor;
importOptions.usdRootPath = GetDefaultRoot(scene);
importOptions.importMonoBehaviours = true;
GameObject root = new GameObject(GetObjectName(importOptions.usdRootPath, path));
if (Selection.gameObjects.Length > 0)
{
root.transform.SetParent(Selection.gameObjects[0].transform);
}
try
{
UsdToGameObject(root, scene, importOptions);
}
finally
{
scene.Close();
}
}
/// <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;
}
}
// -------------------------------------------------------------------------------------------- //
// Deserialize USD to -> Unity
// -------------------------------------------------------------------------------------------- //
static public void ImportObject(Scene scene,
GameObject go,
pxr.UsdPrim usdPrim,
SceneImportOptions options)
{
if (!options.importMonoBehaviours)
{
return;
}
var comps = usdPrim.GetAuthoredPropertiesInNamespace("unity:component");
foreach (var compProp in comps)
{
var compAttr = usdPrim.GetAttribute(compProp.GetName());
string assemblyQualifiedName = (string)compAttr.Get(0);
var compType = System.Type.GetType(assemblyQualifiedName);
// TODO: Handle multiple components of the same type.
Component comp = go.GetComponent(compType);
if (comp == null)
{
comp = go.AddComponent(compType);
}
var so = new SerializedObject(comp);
var prop = so.GetIterator();
prop.Next(true);
var sb = new System.Text.StringBuilder();
// TODO: Handle multiple components of the same type.
PropertyFromUsd(usdPrim, prop, sb, comp.GetType().Name);
so.ApplyModifiedProperties();
Debug.Log(sb.ToString());
}
}
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();
}
/// <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);
}
BeginReading(Scene scene,
SdfPath usdRoot,
PrimMap map,
SceneImportOptions options)
{
FindPathsJob.usdRoot = usdRoot;
FindPathsJob.scene = scene;
FindPathsJob.results = new SdfPath[8][];
FindPathsJob.queries = new FindPathsJob.IQuery[8];
if (options.ShouldBindMaterials)
{
FindPathsJob.queries[0] = (FindPathsJob.IQuery) new FindPathsJob.Query <MaterialSample>();
}
if (options.importCameras)
{
FindPathsJob.queries[1] = (FindPathsJob.IQuery) new FindPathsJob.Query <CameraSample>();
}
if (options.importMeshes)
{
FindPathsJob.queries[2] = (FindPathsJob.IQuery) new FindPathsJob.Query <MeshSample>();
FindPathsJob.queries[3] = (FindPathsJob.IQuery) new FindPathsJob.Query <CubeSample>();
FindPathsJob.queries[4] = (FindPathsJob.IQuery) new FindPathsJob.Query <SphereSample>();
}
FindPathsJob.queries[5] = (FindPathsJob.IQuery) new FindPathsJob.Query <SkelRootSample>();
if (options.importSkinning)
{
FindPathsJob.queries[6] = (FindPathsJob.IQuery) new FindPathsJob.Query <SkeletonSample>();
}
if (options.importTransforms)
{
FindPathsJob.queries[7] = (FindPathsJob.IQuery) new FindPathsJob.Query <XformSample>();
}
var findPathsJob = new FindPathsJob();
#if !UNITY_2017
var findHandle = findPathsJob.Schedule(FindPathsJob.queries.Length, 1);
findHandle.Complete();
#else
findPathsJob.Run();
#endif
map.Materials = FindPathsJob.results[0];
map.Cameras = FindPathsJob.results[1];
map.Meshes = FindPathsJob.results[2];
map.Cubes = FindPathsJob.results[3];
map.Spheres = FindPathsJob.results[4];
map.SkelRoots = FindPathsJob.results[5];
map.Skeletons = FindPathsJob.results[6];
map.Xforms = FindPathsJob.results[7];
ReadHierJob.paths = FindPathsJob.results.Where(i => i != null).SelectMany(i => i).ToArray();
ReadHierJob.result = new HierInfo[ReadHierJob.paths.Length];
ReadHierJob.scene = scene;
ReadHierJob.skelCache = map.SkelCache;
var readHierInfo = new ReadHierJob();
#if !UNITY_2017
return(readHierInfo.Schedule(ReadHierJob.paths.Length, 8, dependsOn: findHandle));
#else
readHierInfo.Run();
return;
#endif
}
void OnEnable()
{
InitUsd.Initialize();
if (string.IsNullOrEmpty(m_usdMeshPath))
{
m_usdMeshPath = UnityTypeConverter.GetPath(transform);
}
var scene = GetScene();
var binding = ReadUsdWeights(scene);
string skelRootPath;
var skeleton = ReadUsdSkeleton(scene, out skelRootPath);
if (binding == null)
{
binding = new SkelBindingSample();
}
var mesh = GetComponent <SkinnedMeshRenderer>().sharedMesh;
// Process classic four-bone weights first.
var sb = new System.Text.StringBuilder();
#if UNITY_2019_1_OR_NEWER
var bonesPerVert = mesh.GetBonesPerVertex();
int weightsPerBone = 0;
foreach (int count in bonesPerVert)
{
weightsPerBone = weightsPerBone > count ? weightsPerBone : count;
}
var boneWeights = mesh.GetAllBoneWeights();
sb.AppendLine("Many-bone indices: (" + boneWeights.Length + " * 4)");
int bone = 0;
int bi = 0;
int wi = 0;
foreach (var weight in boneWeights)
{
if (wi == 0)
{
sb.Append("i: " + bone + " [");
}
sb.Append(weight.boneIndex + GetUsdBoneData(bi, wi, binding.jointIndices) + ",");
wi++;
if (wi == weightsPerBone)
{
sb.Append("]\n");
bi++;
wi = 0;
}
if (bonesPerVert[bi] != weightsPerBone)
{
// TODO: Unity supports a variable number of weights per bone, but USD does not.
// Therefore, the number of weights may be greater in USD than in Unity. Currently
// the way this works does not correctly handle that case.
Debug.LogWarning("Unity bone count issue, see code comment for details.");
}
bone++;
}
Debug.Log(sb.ToString());
bone = 0;
bi = 0;
wi = 0;
sb = new System.Text.StringBuilder();
sb.AppendLine("Many-bone weights: (" + boneWeights.Length + " * 4)");
foreach (var weight in boneWeights)
{
if (wi == 0)
{
sb.Append("i: " + bone + " [");
}
sb.Append(weight.weight + GetUsdBoneData(bi, wi, binding.jointWeights) + ",");
wi++;
if (wi == weightsPerBone)
{
sb.Append("]\n");
bi++;
wi = 0;
}
bone++;
}
Debug.Log(sb.ToString());
#else
sb.AppendLine("Legacy 4-bone indices: (" + mesh.boneWeights.Length + " * 4)");
int bone = 0;
foreach (var weight in mesh.boneWeights)
{
sb.Append("[");
sb.Append(weight.boneIndex0 + GetUsdBoneData(bone, 0, binding.jointIndices) + ",");
sb.Append(weight.boneIndex1 + GetUsdBoneData(bone, 1, binding.jointIndices) + ",");
sb.Append(weight.boneIndex2 + GetUsdBoneData(bone, 2, binding.jointIndices) + ",");
sb.Append(weight.boneIndex3 + GetUsdBoneData(bone, 3, binding.jointIndices) + "]\n");
bone++;
}
Debug.Log(sb.ToString());
bone = 0;
sb = new System.Text.StringBuilder();
sb.AppendLine("Legacy 4-bone weights: (" + mesh.boneWeights.Length + " * 4)");
foreach (var weight in mesh.boneWeights)
{
sb.Append("[");
sb.Append(weight.weight0 + GetUsdBoneData(bone, 0, binding.jointWeights) + ",");
sb.Append(weight.weight1 + GetUsdBoneData(bone, 1, binding.jointWeights) + ",");
sb.Append(weight.weight2 + GetUsdBoneData(bone, 2, binding.jointWeights) + ",");
sb.Append(weight.weight3 + GetUsdBoneData(bone, 3, binding.jointWeights) + "]\n");
bone++;
}
Debug.Log(sb.ToString());
#endif
sb = new System.Text.StringBuilder();
var bones = GetComponent <SkinnedMeshRenderer>().bones;
var rootBone = GetComponent <SkinnedMeshRenderer>().rootBone;
var root = UnityTypeConverter.GetPath(rootBone);
sb.AppendLine("Bones: (" + bones.Length + ")");
sb.AppendLine("Root Bone: " + root);
int i = 0;
foreach (var boneXf in bones)
{
sb.AppendLine(UnityTypeConverter.GetPath(boneXf));
if (binding.joints != null)
{
sb.AppendLine(root + "\\" + binding.joints[i++] + "\n");
}
}
Debug.Log(sb.ToString());
sb = new System.Text.StringBuilder();
sb.AppendLine("Bind Transforms: (" + mesh.bindposes.Length + ")");
i = -1;
var options = new SceneImportOptions();
options.changeHandedness = m_basisTransform;
foreach (var boneXf in bones)
{
i++;
var bindPose = mesh.bindposes[i];
var bonePath = UnityTypeConverter.GetPath(boneXf);
sb.AppendLine("Pose[" + i + "] " + bonePath);
sb.AppendLine(bindPose.ToString());
if (skeleton.bindTransforms != null)
{
if (string.IsNullOrEmpty(skelRootPath))
{
continue;
}
bonePath = bonePath.Substring(skelRootPath.Length);
bonePath = bonePath.TrimStart('/');
foreach (var joint in skeleton.joints)
{
if (joint == bonePath)
{
var usdMat = skeleton.bindTransforms[i];
XformImporter.ImportXform(ref usdMat, options);
sb.AppendLine(usdMat.ToString() + "\n");
bonePath = null;
break;
}
}
if (string.IsNullOrEmpty(bonePath))
{
continue;
}
sb.Append("Bone not found in USD: " + bonePath + "\n\n");
}
}
Debug.Log(sb.ToString());
}
/// <summary>
/// Custom importer. This works almost exactly as the ScriptedImporter, but does not require
/// the new API.
/// </summary>
public static void SavePrefab(GameObject rootObject,
string prefabPath,
string playableClipName,
SceneImportOptions importOptions)
{
Directory.CreateDirectory(Path.GetDirectoryName(prefabPath));
GameObject oldPrefab = AssetDatabase.LoadAssetAtPath <GameObject>(prefabPath);
GameObject prefab = null;
if (oldPrefab == null)
{
// Create the prefab. At this point, the meshes do not yet exist and will be
// dangling references
#if UNITY_2018_3_OR_NEWER
prefab = PrefabUtility.SaveAsPrefabAsset(rootObject, prefabPath);
#else
prefab = PrefabUtility.CreatePrefab(prefabPath, rootObject);
#endif
HashSet <Mesh> meshes;
HashSet <Material> materials;
AddObjectsToAsset(rootObject, prefab, importOptions, out meshes, out materials);
foreach (var mesh in meshes)
{
AssetDatabase.AddObjectToAsset(mesh, prefab);
}
foreach (var mat in materials)
{
AssetDatabase.AddObjectToAsset(mat, prefab);
}
// Fix the dangling references.
#if UNITY_2018_3_OR_NEWER
prefab = PrefabUtility.SaveAsPrefabAsset(rootObject, prefabPath);
#else
prefab = PrefabUtility.ReplacePrefab(rootObject, prefab);
#endif
var playable = ScriptableObject.CreateInstance <UsdPlayableAsset>();
playable.SourceUsdAsset.defaultValue = prefab.GetComponent <UsdAsset>();
playable.name = playableClipName;
AssetDatabase.AddObjectToAsset(playable, prefab);
#if UNITY_2018_3_OR_NEWER
prefab = PrefabUtility.SavePrefabAsset(prefab);
#endif
}
else
{
HashSet <Mesh> meshes;
HashSet <Material> materials;
#if UNITY_2018_3_OR_NEWER
oldPrefab = PrefabUtility.SaveAsPrefabAsset(rootObject, prefabPath);
#endif
AddObjectsToAsset(rootObject, oldPrefab, importOptions, out meshes, out materials);
// ReplacePrefab only removes the GameObjects from the asset.
// Clear out all non-prefab junk (ie, meshes), because otherwise it piles up.
// The main difference between LoadAllAssetRepresentations and LoadAllAssets
// is that the former returns MonoBehaviours and the latter does not.
foreach (var obj in AssetDatabase.LoadAllAssetRepresentationsAtPath(prefabPath))
{
if (obj is GameObject)
{
continue;
}
if (obj is Mesh && meshes.Contains((Mesh)obj))
{
meshes.Remove((Mesh)obj);
continue;
}
if (obj is Material && materials.Contains((Material)obj))
{
materials.Remove((Material)obj);
continue;
}
Object.DestroyImmediate(obj, allowDestroyingAssets: true);
}
foreach (var mesh in meshes)
{
AssetDatabase.AddObjectToAsset(mesh, oldPrefab);
}
foreach (var mat in materials)
{
AssetDatabase.AddObjectToAsset(mat, oldPrefab);
}
#if UNITY_2018_3_OR_NEWER
prefab = PrefabUtility.SaveAsPrefabAsset(rootObject, prefabPath);
#else
if (oldPrefab != rootObject)
{
prefab = PrefabUtility.ReplacePrefab(
rootObject, oldPrefab, ReplacePrefabOptions.ReplaceNameBased);
}
else
{
prefab = oldPrefab;
}
#endif
var playable = ScriptableObject.CreateInstance <UsdPlayableAsset>();
playable.SourceUsdAsset.defaultValue = prefab.GetComponent <UsdAsset>();
playable.name = playableClipName;
AssetDatabase.AddObjectToAsset(playable, prefab);
#if UNITY_2018_3_OR_NEWER
PrefabUtility.SavePrefabAsset(prefab);
#endif
}
AssetDatabase.ImportAsset(prefabPath, ImportAssetOptions.ForceUpdate);
AssetDatabase.SaveAssets();
}
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++;
}
}
/// <summary>
/// Applies the contents of this USD file to a foreign root object.
/// </summary>
/// <remarks>
/// The idea here is that one may have many animation clips, but only a single GameObject in
/// the Unity scenegraph.
/// </remarks>
public void SetTime(double time, UsdAsset foreignRoot, bool saveMeshUpdates)
{
var scene = GetScene();
if (scene == null)
{
Debug.LogWarning("Null scene from GetScene() at " + UnityTypeConverter.GetPath(transform));
return;
}
// Careful not to update any local members here, if this data is driven from a prefab, we
// dont want those changes to be baked back into the asset.
time += foreignRoot.m_usdTimeOffset;
float usdTime = (float)(scene.StartTime + time * scene.Stage.GetTimeCodesPerSecond());
if (usdTime > scene.EndTime)
{
return;
}
if (usdTime < scene.StartTime)
{
return;
}
scene.Time = usdTime;
var options = new SceneImportOptions();
foreignRoot.StateToOptions(ref options);
PrepOptionsForTimeChange(ref options);
if (foreignRoot.m_lastPrimMap == null)
{
foreignRoot.m_lastPrimMap = new PrimMap();
options.importHierarchy = true;
}
if (m_usdVariabilityCache)
{
if (m_lastAccessMask == null)
{
m_lastAccessMask = new AccessMask();
scene.IsPopulatingAccessMask = true;
}
}
else
{
m_lastAccessMask = null;
}
if (m_debugPrintVariabilityCache && m_lastAccessMask != null &&
!scene.IsPopulatingAccessMask)
{
var sb = new System.Text.StringBuilder();
foreach (var kvp in m_lastAccessMask.Included)
{
sb.AppendLine(kvp.Key);
foreach (var member in kvp.Value)
{
sb.AppendLine(" ." + member.Name);
}
sb.AppendLine();
}
Debug.Log(sb.ToString());
}
scene.AccessMask = m_lastAccessMask;
SceneImporter.ImportUsd(foreignRoot.gameObject,
scene,
foreignRoot.m_lastPrimMap,
options);
scene.AccessMask = null;
if (m_lastAccessMask != null)
{
scene.IsPopulatingAccessMask = false;
}
}
/// <summary>
/// Rebuilds the USD scene as Unity GameObjects, with a limited budget per update.
/// </summary>
public static IEnumerator BuildScene(Scene scene,
GameObject root,
SceneImportOptions importOptions,
PrimMap primMap,
float targetFrameMilliseconds,
bool composingSubtree)
{
var timer = new System.Diagnostics.Stopwatch();
var usdPrimRoot = new pxr.SdfPath(importOptions.usdRootPath);
// Setting an arbitrary fudge factor of 20% is very non-scientific, however it's better than
// nothing. The correct way to hit a deadline is to predict how long each iteration actually
// takes and then return early if the estimated time is over budget.
float targetTime = targetFrameMilliseconds * .8f;
timer.Start();
// Reconstruct the USD hierarchy as Unity GameObjects.
// A PrimMap is returned for tracking the USD <-> Unity mapping.
Profiler.BeginSample("USD: Build Hierarchy");
if (importOptions.importHierarchy || importOptions.forceRebuild)
{
// When a USD file is fully RE-imported, all exsiting USD data must be removed. The old
// assumption was that the root would never have much more than the UsdAsset component
// itself, however it's now clear that the root may also have meaningful USD data added
// too.
//
// TODO(jcowles): This feels like a workaround. What we really want here is an "undo"
// process for changes made to the root GameObject. For example, to clean up non-USD
// components which may have been added (e.g. what if a mesh is imported to the root?
// currently the MeshRenderer etc will remain after re-import).
RemoveComponent <UsdAssemblyRoot>(root);
RemoveComponent <UsdVariantSet>(root);
RemoveComponent <UsdModelRoot>(root);
RemoveComponent <UsdLayerStack>(root);
RemoveComponent <UsdPayload>(root);
RemoveComponent <UsdPrimSource>(root);
primMap.Clear();
HierarchyBuilder.BuildGameObjects(scene,
root,
usdPrimRoot,
scene.Find(usdPrimRoot.ToString(), "UsdSchemaBase"),
primMap,
importOptions);
}
Profiler.EndSample();
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
Profiler.BeginSample("USD: Post Process Hierarchy");
foreach (var processor in root.GetComponents <IImportPostProcessHierarchy>())
{
try {
processor.PostProcessHierarchy(primMap, importOptions);
} catch (System.Exception ex) {
Debug.LogException(ex);
}
}
Profiler.EndSample();
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
//
// Pre-process UsdSkelRoots.
//
var skelRoots = new List <pxr.UsdSkelRoot>();
if (importOptions.importSkinning)
{
Profiler.BeginSample("USD: Process UsdSkelRoots");
foreach (var path in primMap.SkelRoots)
{
try {
var skelRootPrim = scene.GetPrimAtPath(path);
if (!skelRootPrim)
{
Debug.LogWarning("SkelRoot prim not found: " + path);
continue;
}
var skelRoot = new pxr.UsdSkelRoot(skelRootPrim);
if (!skelRoot)
{
Debug.LogWarning("SkelRoot prim not SkelRoot type: " + path);
continue;
}
skelRoots.Add(skelRoot);
GameObject go = primMap[path];
ImporterBase.GetOrAddComponent <Animator>(go, true);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error pre-processing SkelRoot <" + path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
}
//
// Import known prim types.
//
// Materials.
Profiler.BeginSample("USD: Build Materials");
if (importOptions.ShouldBindMaterials)
{
foreach (var pathAndSample in scene.ReadAll <MaterialSample>(primMap.Materials))
{
try {
var mat = MaterialImporter.BuildMaterial(scene,
pathAndSample.path,
pathAndSample.sample,
importOptions);
if (mat != null)
{
importOptions.materialMap[pathAndSample.path] = mat;
}
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing material <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
}
Profiler.EndSample();
//
// Start threads.
//
ReadAllJob <XformSample> readXforms;
if (importOptions.importTransforms)
{
readXforms = new ReadAllJob <XformSample>(scene, primMap.Xforms);
#if UNITY_2018_1_OR_NEWER
readXforms.Schedule(primMap.Xforms.Length, 4);
#else
readXforms.Run();
#endif
}
if (importOptions.importMeshes)
{
ActiveMeshImporter.BeginReading(scene, primMap);
}
#if UNITY_2018_1_OR_NEWER
JobHandle.ScheduleBatchedJobs();
#endif
// Xforms.
//
// Note that we are specifically filtering on XformSample, not Xformable, this way only
// Xforms are processed to avoid doing that work redundantly.
if (importOptions.importTransforms)
{
Profiler.BeginSample("USD: Build Xforms");
foreach (var pathAndSample in readXforms)
{
try {
if (pathAndSample.path == usdPrimRoot)
{
// Never read the xform from the USD root, that will be authored in Unity.
continue;
}
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
foreach (var pathAndSample in scene.ReadAll <XformSample>(primMap.SkelRoots))
{
try {
if (pathAndSample.path == usdPrimRoot)
{
// Never read the xform from the USD root, that will be authored in Unity.
continue;
}
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
if (importOptions.importSkinning)
{
foreach (var pathAndSample in scene.ReadAll <XformSample>(primMap.Skeletons))
{
try {
if (pathAndSample.path == usdPrimRoot)
{
// Never read the xform from the USD root, that will be authored in Unity.
continue;
}
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
}
Profiler.EndSample();
}
// Meshes.
if (importOptions.importMeshes)
{
Profiler.BeginSample("USD: Build Meshes");
IEnumerator it = ActiveMeshImporter.Import(scene, primMap, importOptions);
while (it.MoveNext())
{
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
// Cubes.
Profiler.BeginSample("USD: Build Cubes");
foreach (var pathAndSample in scene.ReadAll <CubeSample>(primMap.Cubes))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
CubeImporter.BuildCube(pathAndSample.sample, go, importOptions);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing cube <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
}
// Cameras.
if (importOptions.importCameras)
{
Profiler.BeginSample("USD: Cameras");
foreach (var pathAndSample in scene.ReadAll <CameraSample>(primMap.Cameras))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
// The camera has many value-type parameters that need to be handled correctly when not
// not animated. For now, only the camera transform will animate, until this is fixed.
if (scene.AccessMask == null || scene.IsPopulatingAccessMask)
{
CameraImporter.BuildCamera(pathAndSample.sample, go, importOptions);
}
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing camera <" + pathAndSample.path + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
}
// Build out masters for instancing.
Profiler.BeginSample("USD: Build Instances");
foreach (var masterRootPath in primMap.GetMasterRootPaths())
{
try {
Transform masterRootXf = primMap[masterRootPath].transform;
// Transforms
if (importOptions.importTransforms)
{
Profiler.BeginSample("USD: Build Xforms");
foreach (var pathAndSample in scene.ReadAll <XformSample>(masterRootPath))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
}
foreach (var pathAndSample in scene.ReadAll <XformSample>(masterRootPath))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
}
foreach (var pathAndSample in scene.ReadAll <XformSample>(primMap.Skeletons))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing xform <" + pathAndSample.path + ">", ex));
}
}
Profiler.EndSample();
}
// Meshes.
if (importOptions.importMeshes)
{
Profiler.BeginSample("USD: Build Meshes");
foreach (var pathAndSample in scene.ReadAll <MeshSample>(masterRootPath))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
var subsets = MeshImporter.ReadGeomSubsets(scene, pathAndSample.path);
MeshImporter.BuildMesh(pathAndSample.path, pathAndSample.sample, subsets, go, importOptions);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing mesh <" + pathAndSample.path + ">", ex));
}
}
Profiler.EndSample();
// Cubes.
Profiler.BeginSample("USD: Build Cubes");
foreach (var pathAndSample in scene.ReadAll <CubeSample>(masterRootPath))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
CubeImporter.BuildCube(pathAndSample.sample, go, importOptions);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing cube <" + pathAndSample.path + ">", ex));
}
}
Profiler.EndSample();
}
// Cameras.
if (importOptions.importCameras)
{
Profiler.BeginSample("USD: Build Cameras");
foreach (var pathAndSample in scene.ReadAll <CameraSample>(masterRootPath))
{
try {
GameObject go = primMap[pathAndSample.path];
NativeImporter.ImportObject(scene, go, scene.GetPrimAtPath(pathAndSample.path), importOptions);
XformImporter.BuildXform(pathAndSample.path, pathAndSample.sample, go, importOptions, scene);
CameraImporter.BuildCamera(pathAndSample.sample, go, importOptions);
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing camera <" + pathAndSample.path + ">", ex));
}
}
Profiler.EndSample();
}
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing master <" + masterRootPath + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
} // Instances.
Profiler.EndSample();
//
// Post-process dependencies: materials and bones.
//
Profiler.BeginSample("USD: Process Material Bindings");
try {
// TODO: Currently ProcessMaterialBindings runs too long and will go over budget for any
// large scene. However, pulling the loop into this code feels wrong in terms of
// responsibilities.
// Process all material bindings in a single vectorized request.
MaterialImporter.ProcessMaterialBindings(scene, importOptions);
} catch (System.Exception ex) {
Debug.LogException(new ImportException("Failed in ProcessMaterialBindings", ex));
}
Profiler.EndSample();
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
//
// SkinnedMesh bone bindings.
//
if (importOptions.importSkinning)
{
Profiler.BeginSample("USD: Build Skeletons");
var skeletonSamples = new Dictionary <pxr.SdfPath, SkeletonSample>();
foreach (var skelRoot in skelRoots)
{
try {
var bindings = new pxr.UsdSkelBindingVector();
if (!primMap.SkelBindings.TryGetValue(skelRoot.GetPath(), out bindings))
{
Debug.LogWarning("No bindings found skelRoot: " + skelRoot.GetPath());
}
if (bindings.Count == 0)
{
Debug.LogWarning("No bindings found skelRoot: " + skelRoot.GetPath());
}
foreach (var skelBinding in bindings)
{
// The SkelRoot will likely have a skeleton binding, but it's inherited, so the bound
// skeleton isn't actually known until it's queried from the binding. Still, we would
// like not to reprocess skeletons redundantly, so skeletons are cached into a
// dictionary.
Profiler.BeginSample("Build Bind Transforms");
var skelPath = skelBinding.GetSkeleton().GetPath();
SkeletonSample skelSample = null;
if (!skeletonSamples.TryGetValue(skelPath, out skelSample))
{
skelSample = new SkeletonSample();
Profiler.BeginSample("Read Skeleton");
scene.Read(skelPath, skelSample);
Profiler.EndSample();
skeletonSamples.Add(skelPath, skelSample);
// Unity uses the inverse bindTransform, since that's actually what's needed for
// skinning. Do that once here, so each skinned mesh doesn't need to do it
// redundantly.
SkeletonImporter.BuildBindTransforms(skelPath, skelSample, importOptions);
var bindXforms = new pxr.VtMatrix4dArray();
var prim = scene.GetPrimAtPath(skelPath);
var skel = new pxr.UsdSkelSkeleton(prim);
Profiler.BeginSample("Get SkelQuery");
pxr.UsdSkelSkeletonQuery skelQuery = primMap.SkelCache.GetSkelQuery(skel);
Profiler.EndSample();
Profiler.BeginSample("Get JointWorldBind Transforms");
if (!skelQuery.GetJointWorldBindTransforms(bindXforms))
{
throw new ImportException("Failed to compute binding trnsforms for <" + skelPath + ">");
}
Profiler.EndSample();
SkeletonImporter.BuildDebugBindTransforms(skelSample, primMap[skelPath], importOptions);
}
Profiler.EndSample();
if (importOptions.importSkinWeights)
{
//
// Apply skinning weights to each skinned mesh.
//
Profiler.BeginSample("Apply Skin Weights");
foreach (var skinningQuery in skelBinding.GetSkinningTargetsAsVector())
{
var meshPath = skinningQuery.GetPrim().GetPath();
try {
var skelBindingSample = new SkelBindingSample();
var goMesh = primMap[meshPath];
scene.Read(meshPath, skelBindingSample);
Profiler.BeginSample("Build Skinned Mesh");
SkeletonImporter.BuildSkinnedMesh(
meshPath,
skelPath,
skelSample,
skelBindingSample,
goMesh,
primMap,
importOptions);
Profiler.EndSample();
// In terms of performance, this is almost free.
goMesh.GetComponent <SkinnedMeshRenderer>().rootBone = primMap[skelPath].transform.GetChild(0);
} catch (System.Exception ex) {
Debug.LogException(new ImportException("Error skinning mesh: " + meshPath, ex));
}
}
Profiler.EndSample();
}
}
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing SkelRoot <" + skelRoot.GetPath() + ">", ex));
}
} // foreach SkelRoot
Profiler.EndSample();
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
//
// Bone transforms.
//
Profiler.BeginSample("USD: Pose Bones");
foreach (var pathAndSample in skeletonSamples)
{
var skelPath = pathAndSample.Key;
try {
var prim = scene.GetPrimAtPath(skelPath);
var skel = new pxr.UsdSkelSkeleton(prim);
pxr.UsdSkelSkeletonQuery skelQuery = primMap.SkelCache.GetSkelQuery(skel);
var joints = skelQuery.GetJointOrder();
var restXforms = new pxr.VtMatrix4dArray();
var time = scene.Time.HasValue ? scene.Time.Value : pxr.UsdTimeCode.Default();
Profiler.BeginSample("Compute Joint Local Transforms");
if (!skelQuery.ComputeJointLocalTransforms(restXforms, time, atRest: false))
{
throw new ImportException("Failed to compute bind trnsforms for <" + skelPath + ">");
}
Profiler.EndSample();
Profiler.BeginSample("Build Bones");
for (int i = 0; i < joints.size(); i++)
{
var jointPath = scene.GetSdfPath(joints[i]);
if (joints[i] == "/")
{
jointPath = skelPath;
}
else if (jointPath.IsAbsolutePath())
{
Debug.LogException(new System.Exception("Unexpected absolute joint path: " + jointPath));
jointPath = new pxr.SdfPath(joints[i].ToString().TrimStart('/'));
jointPath = skelPath.AppendPath(jointPath);
}
else
{
jointPath = skelPath.AppendPath(jointPath);
}
var goBone = primMap[jointPath];
Profiler.BeginSample("Convert Matrix");
var restXform = UnityTypeConverter.FromMatrix(restXforms[i]);
Profiler.EndSample();
Profiler.BeginSample("Build Bone");
SkeletonImporter.BuildSkeletonBone(skelPath, goBone, restXform, joints, importOptions);
Profiler.EndSample();
}
Profiler.EndSample();
} catch (System.Exception ex) {
Debug.LogException(
new ImportException("Error processing SkelRoot <" + skelPath + ">", ex));
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
}
//
// Apply instancing.
//
if (importOptions.importSceneInstances)
{
Profiler.BeginSample("USD: Build Scene-Instances");
try {
// Build scene instances.
InstanceImporter.BuildSceneInstances(primMap, importOptions);
} catch (System.Exception ex) {
Debug.LogException(new ImportException("Failed in BuildSceneInstances", ex));
}
Profiler.EndSample();
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
// Build point instances.
if (importOptions.importPointInstances)
{
Profiler.BeginSample("USD: Build Point-Instances");
// TODO: right now all point instancer data is read, but we only need prototypes and indices.
foreach (var pathAndSample in scene.ReadAll <PointInstancerSample>())
{
try {
GameObject instancerGo = primMap[pathAndSample.path];
// Now build the point instances.
InstanceImporter.BuildPointInstances(scene,
primMap,
pathAndSample.path,
pathAndSample.sample,
instancerGo,
importOptions);
} catch (System.Exception ex) {
Debug.LogError("Error processing point instancer <" + pathAndSample.path + ">: " + ex.Message);
}
if (ShouldYield(targetTime, timer))
{
yield return(null); ResetTimer(timer);
}
}
Profiler.EndSample();
}
//
// Apply root transform corrections.
//
Profiler.BeginSample("USD: Build Root Transforms");
if (!composingSubtree)
{
if (!root)
{
// There is no single root,
// Apply root transform corrections to all imported root prims.
foreach (KeyValuePair <pxr.SdfPath, GameObject> kvp in primMap)
{
if (kvp.Key.IsRootPrimPath() && kvp.Value != null)
{
// The root object at which the USD scene will be reconstructed.
// It may need a Z-up to Y-up conversion and a right- to left-handed change of basis.
XformImporter.BuildSceneRoot(scene, kvp.Value.transform, importOptions);
}
}
}
else
{
// There is only one root, apply a single transform correction.
XformImporter.BuildSceneRoot(scene, root.transform, importOptions);
}
}
Profiler.EndSample();
Profiler.BeginSample("USD: Post Process Components");
foreach (var processor in root.GetComponents <IImportPostProcessComponents>())
{
try {
processor.PostProcessComponents(primMap, importOptions);
} catch (System.Exception ex) {
Debug.LogException(ex);
}
}
Profiler.EndSample();
}
/// <summary>
/// Build the root of a scene under which more USD data will be imported. If the handedness
/// is changed here, no subsequent changes are required below, however the root will contain
/// a negative scale.
/// </summary>
public static void BuildSceneRoot(Scene scene, Transform root, SceneImportOptions options)
{
var stageRoot = root.GetComponent <UsdAsset>();
bool newStageRoot = false;
if (stageRoot == null)
{
stageRoot = root.gameObject.AddComponent <UsdAsset>();
stageRoot.usdFullPath = scene.FilePath;
newStageRoot = true;
ImporterBase.MoveComponentFirst(stageRoot);
stageRoot.OptionsToState(options);
}
if (newStageRoot ||
options.changeHandedness != stageRoot.LastHandedness ||
options.scale != stageRoot.LastScale ||
options.forceRebuild)
{
var localScale = root.transform.localScale;
var localRotation = root.transform.localRotation;
if (options.forceRebuild)
{
localScale = Vector3.one;
localRotation = Quaternion.identity;
}
else if (!newStageRoot)
{
// Undo the previous transforms.
UndoRootTransform(scene, stageRoot, ref localScale, ref localRotation);
}
stageRoot.LastScale = options.scale;
stageRoot.LastHandedness = options.changeHandedness;
// Handle configurable up-axis (Y or Z).
float invert = options.changeHandedness == BasisTransformation.FastWithNegativeScale ? -1 : 1;
if (scene.UpAxis == Scene.UpAxes.Z)
{
localRotation *= Quaternion.AngleAxis(invert * 90, Vector3.right);
}
if (options.changeHandedness == BasisTransformation.FastWithNegativeScale)
{
// Convert from right-handed (USD) to left-handed (Unity).
if (scene.UpAxis == Scene.UpAxes.Z)
{
localScale.y *= -1;
}
else
{
localScale.z *= -1;
}
}
if (Mathf.Abs(options.scale - 1.0f) > 0.0001)
{
// Unilaterally setting the scale here is a little wrong, since it will stomp the root
// object scale if set in Unity.
localScale *= options.scale;
}
root.transform.localScale = localScale;
root.transform.localRotation = localRotation;
}
}
static void AddObjectsToAsset(GameObject rootObject,
Object asset,
SceneImportOptions importOptions,
out HashSet <Mesh> usedMeshes,
out HashSet <Material> usedMaterials)
{
var meshes = new HashSet <Mesh>();
var materials = new HashSet <Material>();
materials.Add(importOptions.materialMap.DisplayColorMaterial);
materials.Add(importOptions.materialMap.MetallicWorkflowMaterial);
materials.Add(importOptions.materialMap.SpecularWorkflowMaterial);
var tempMat = importOptions.materialMap.DisplayColorMaterial;
if (tempMat != null && AssetDatabase.GetAssetPath(tempMat) == "")
{
materials.Add(tempMat);
}
tempMat = importOptions.materialMap.MetallicWorkflowMaterial;
if (tempMat != null && AssetDatabase.GetAssetPath(tempMat) == "")
{
materials.Add(tempMat);
}
tempMat = importOptions.materialMap.SpecularWorkflowMaterial;
if (tempMat != null && AssetDatabase.GetAssetPath(tempMat) == "")
{
materials.Add(tempMat);
}
foreach (var mf in rootObject.GetComponentsInChildren <MeshFilter>())
{
if (!mf)
{
continue;
}
if (mf.sharedMesh != null && meshes.Add(mf.sharedMesh))
{
mf.sharedMesh.name = mf.name;
}
}
foreach (var mf in rootObject.GetComponentsInChildren <MeshRenderer>())
{
if (!mf)
{
continue;
}
foreach (var mat in mf.sharedMaterials)
{
if (mat != null && !materials.Add(mat))
{
mat.name = mf.name;
continue;
}
}
}
foreach (var mf in rootObject.GetComponentsInChildren <SkinnedMeshRenderer>())
{
if (!mf)
{
continue;
}
if (mf.sharedMesh != null && meshes.Add(mf.sharedMesh))
{
mf.sharedMesh.name = mf.name;
}
foreach (var mat in mf.sharedMaterials)
{
if (mat != null && !materials.Add(mat))
{
mat.name = mf.name;
continue;
}
}
}
usedMeshes = meshes;
usedMaterials = materials;
}
/// <summary>
/// Builds a Unity Material from the given USD material sample.
/// </summary>
public static Material BuildMaterial(Scene scene,
string materialPath,
MaterialSample sample,
SceneImportOptions options)
{
if (string.IsNullOrEmpty(sample.surface.connectedPath))
{
return(null);
}
var previewSurf = new UnityPreviewSurfaceSample();
scene.Read(new pxr.SdfPath(sample.surface.connectedPath).GetPrimPath(), previewSurf);
// Currently, only UsdPreviewSurface is supported.
if (previewSurf.id == null || previewSurf.id != "UsdPreviewSurface")
{
Debug.LogWarning("Unknown surface type: <" + sample.surface.connectedPath + ">"
+ "Surface ID: " + previewSurf.id);
return(null);
}
Material mat = null;
if (options.materialMap.useOriginalShaderIfAvailable && !string.IsNullOrEmpty(previewSurf.unity.shaderName))
{
// We may or may not have the original shader.
var shader = Shader.Find(previewSurf.unity.shaderName);
if (shader)
{
mat = new Material(shader);
mat.shaderKeywords = previewSurf.unity.shaderKeywords;
}
else
{
Debug.LogWarning("Original shader not found: " + previewSurf.unity.shaderName);
}
}
if (mat == null)
{
if (previewSurf.useSpecularWorkflow.defaultValue == 1)
{
// Metallic workflow.
mat = Material.Instantiate(options.materialMap.SpecularWorkflowMaterial);
}
else
{
// Metallic workflow.
mat = Material.Instantiate(options.materialMap.MetallicWorkflowMaterial);
}
}
foreach (var kvp in previewSurf.unity.colorArgs)
{
mat.SetColor(kvp.Key, kvp.Value);
}
foreach (var kvp in previewSurf.unity.floatArgs)
{
mat.SetFloat(kvp.Key, kvp.Value);
}
foreach (var kvp in previewSurf.unity.vectorArgs)
{
mat.SetVector(kvp.Key, kvp.Value);
}
var pipeline = UnityEngine.Rendering.GraphicsSettings.renderPipelineAsset;
if (!pipeline)
{
var matAdapter = new StandardShaderImporter(mat);
matAdapter.ImportParametersFromUsd(scene, materialPath, sample, previewSurf, options);
matAdapter.ImportFromUsd();
}
else if (pipeline.GetType().Name == "HDRenderPipelineAsset")
{
// Robustness: Comparing a strng ^ here is not great, but there is no other option.
var matAdapter = new HdrpShaderImporter(mat);
matAdapter.ImportParametersFromUsd(scene, materialPath, sample, previewSurf, options);
matAdapter.ImportFromUsd();
}
else
{
// Fallback to the Standard importer, which may pickup some attributes by luck.
var matAdapter = new StandardShaderImporter(mat);
matAdapter.ImportParametersFromUsd(scene, materialPath, sample, previewSurf, options);
matAdapter.ImportFromUsd();
}
// Get the material name from the path
if (mat != null && !string.IsNullOrEmpty(materialPath))
{
mat.name = new pxr.SdfPath(materialPath).GetName();
}
return(mat);
}
public static Texture2D ImportConnectedTexture <T>(Scene scene,
Connectable <T> connection,
bool isNormalMap,
SceneImportOptions options,
out string uvPrimvar)
{
uvPrimvar = null;
// TODO: look for the expected texture/primvar reader pair.
var textureSample = new TextureReaderSample();
var connectedPrimPath = scene.GetSdfPath(connection.connectedPath).GetPrimPath();
Texture2D result = null;
scene.Read(connectedPrimPath, textureSample);
if (textureSample.file.defaultValue != null &&
!string.IsNullOrEmpty(textureSample.file.defaultValue.GetResolvedPath()))
{
if (OnResolveTexture != null)
{
result = OnResolveTexture(textureSample.file.defaultValue, isNormalMap, options);
}
else
{
result = DefaultTextureResolver(textureSample.file.defaultValue, isNormalMap, options);
}
}
Connectable <Vector2> st = textureSample.st;
if (st != null && st.IsConnected() && !string.IsNullOrEmpty(st.connectedPath))
{
var pvSrc = new PrimvarReaderSample <Vector2>();
scene.Read(new pxr.SdfPath(textureSample.st.connectedPath).GetPrimPath(), pvSrc);
if (pvSrc.varname != null)
{
if (pvSrc.varname.IsConnected())
{
var connPath = new pxr.SdfPath(pvSrc.varname.GetConnectedPath());
var attr = scene.GetAttributeAtPath(connPath);
if (attr != null)
{
var value = attr.Get(scene.Time);
uvPrimvar = pxr.UsdCs.VtValueToTfToken(value).ToString();
}
else
{
Debug.LogWarning("No primvar name was provided at the connected path: " + connPath);
uvPrimvar = "";
}
}
else if (pvSrc.varname.defaultValue != null)
{
// Ask the mesh importer to load the specified texcoord.
// This must be a callback, since materials-to-meshes are one-to-many.
uvPrimvar = pvSrc.varname.defaultValue;
}
}
}
return(result);
}