void ExportMesh(Scene scene, GameObject go, ExportPlan exportPlan)
{
MeshFilter mf = go.GetComponent <MeshFilter>();
Mesh mesh = mf.mesh;
bool unvarying = scene.Time == null;
if (unvarying)
{
// Only export the mesh topology on the first frame.
var sample = (MeshSample)exportPlan.sample;
sample.transform = GetLocalTransformMatrix(go.transform);
// Unity uses a forward vector that matches DirectX, but USD matches OpenGL, so a change of
// basis is required. There are shortcuts, but this is fully general.
sample.ConvertTransform();
sample.normals = mesh.normals;
sample.points = mesh.vertices;
sample.tangents = mesh.tangents;
sample.extent = mesh.bounds;
sample.colors = mesh.colors;
if (sample.colors != null && sample.colors.Length != sample.points.Length)
{
sample.colors = null;
}
// Set face vertex counts and indices.
sample.SetTriangles(mesh.triangles);
scene.Write(exportPlan.path, sample);
var mr = go.GetComponent <MeshRenderer>();
string usdMaterialPath;
if (!m_materialMap.TryGetValue(mr.material, out usdMaterialPath))
{
Debug.LogError("Invalid material bound for: " + exportPlan.path);
}
else
{
MaterialSample.Bind(scene, exportPlan.path, usdMaterialPath);
}
}
else
{
var sample = new XformSample();
sample.transform = GetLocalTransformMatrix(go.transform);
// Unity uses a forward vector that matches DirectX, but USD matches OpenGL, so a change of
// basis is required. There are shortcuts, but this is fully general.
sample.ConvertTransform();
scene.Write(exportPlan.path, sample);
}
// On all other frames, we just export the mesh transform data.
// TODO(jcowles): cant currently do this because the USD prim typeName is overwritten.
//ExportXform(scene, go, exportPlan, unvarying: false);
}
void ExportXform(Scene scene, GameObject go, ExportPlan exportPlan)
{
XformSample sample = (XformSample)exportPlan.sample;
sample.transform = GetLocalTransformMatrix(go.transform);
// Unity uses a forward vector that matches DirectX, but USD matches OpenGL, so a change of
// basis is required. There are shortcuts, but this is fully general.
sample.ConvertTransform();
scene.Write(exportPlan.path, sample);
}
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;
}
}
/// Authors a USD Xform prim at the given path with the given matrix transform.
static void CreateXform(USD.NET.Scene scene, string path, Matrix4x4?xform = null)
{
var sample = new XformSample();
if (xform.HasValue)
{
sample.transform = xform.Value;
}
else
{
sample.transform = Matrix4x4.identity;
}
scene.Write(path, sample);
}
public void UsdAsset_Reload_FileDidNotChange_ValuesDoNotChange()
{
var xform = new XformSample();
m_usdAsset.GetScene().Read("/TestPrim", xform);
var translate = xform.transform.GetColumn(3);
Assert.AreEqual(new Vector4(1, 1, 1, 1), translate);
// Refresh the asset.
m_usdAsset.Reload(false);
// Ensure that nothing changed.
m_usdAsset.GetScene().Read("/TestPrim", xform);
translate = xform.transform.GetColumn(3);
Assert.AreEqual(new Vector4(1, 1, 1, 1), translate);
}
public IEnumerator UsdRecorder_Records()
{
var sampleT = 3f;
director.Play();
while (Time.time < director.duration)
{
yield return(null);
}
var scene = USD.NET.Scene.Open(usdSettings.OutputFile + ".usd");
var sample = new XformSample();
scene.Time = sampleT * scene.FrameRate; // Frames not seconds
scene.Read("/Cube", sample);
Assert.That(sampleT, Is.EqualTo(sample.transform.m03).Within(1e-5));
}
bool InitExportableParents(GameObject go)
{
if (m_primMap.ContainsKey(go))
{
// Stop processing parents, this keeps the performance of the traversal linear.
return(false);
}
// Any object we add will only be exported as an Xform.
string path = UnityTypeConverter.GetPath(go.transform);
SampleBase sample = new XformSample();
m_primMap.Add(go, new ExportPlan {
path = path, sample = sample, exportFunc = ExportXform
});
Debug.Log(path + " " + sample.GetType().Name);
// Continue processing parents.
return(true);
}
public IEnumerator UsdAsset_Reload_FileHasChangedAndForceRebuild_NewValuesAreRetrieved()
{
var xform = new XformSample();
m_usdAsset.GetScene().Read("/TestPrim", xform);
var translate = xform.transform.GetColumn(3);
Assert.AreEqual(new Vector4(1, 1, 1, 1), translate);
yield return(new WaitForSecondsRealtime(1f));
// Simulate the fact that the usd file was changed on disk.
UpdateTestFile();
// Reload the asset.
m_usdAsset.Reload(true);
// Ensure the new attribute's values can be retrieved.
m_usdAsset.GetScene().Read("/TestPrim", xform);
translate = xform.transform.GetColumn(3);
Assert.AreEqual(new Vector4(2, 2, 2, 1), translate);
yield return(new WaitForSecondsRealtime(1f));
}
public static void ExportXform(ObjectContext objContext, ExportContext exportContext)
{
UnityEngine.Profiling.Profiler.BeginSample("USD: Xform Conversion");
XformSample sample = (XformSample)objContext.sample;
var localRot = objContext.gameObject.transform.localRotation;
var localScale = objContext.gameObject.transform.localScale;
var path = new pxr.SdfPath(objContext.path);
// If exporting for Z-Up, rotate the world.
bool correctZUp = exportContext.scene.UpAxis == Scene.UpAxes.Z;
sample.transform = GetLocalTransformMatrix(
objContext.gameObject.transform,
correctZUp,
path.IsRootPrimPath(),
exportContext.basisTransform);
UnityEngine.Profiling.Profiler.EndSample();
UnityEngine.Profiling.Profiler.BeginSample("USD: Xform Write");
exportContext.scene.Write(objContext.path, sample);
UnityEngine.Profiling.Profiler.EndSample();
}
