void UpdateScene()
{
foreach (var path in m_scene.AllPaths)
{
if (!m_primMap.ContainsKey(path))
{
continue;
}
var xf = new USD.NET.Unity.XformSample();
m_scene.Read(new pxr.SdfPath(path), xf);
var go = m_primMap[path];
AssignTransform(xf, go);
}
}
public static void Xform2Test()
{
var sample = new USD.NET.Unity.XformSample();
var sample2 = new USD.NET.Unity.XformSample();
var mat = new Matrix4x4();
for (int i = 0; i < 16; i++)
{
mat[i] = i;
}
sample.transform = mat;
WriteAndRead(ref sample, ref sample2, true);
AssertEqual(sample2.transform, sample.transform);
AssertEqual(sample2.xformOpOrder, sample.xformOpOrder);
}
public static void TestXform()
{
var sample = new USD.NET.Unity.XformSample();
var sample2 = new USD.NET.Unity.XformSample();
sample.transform = UnityEngine.Matrix4x4.identity;
WriteAndRead(ref sample, ref sample2, true);
if (sample2.transform != sample.transform)
{
throw new Exception("Values do not match");
}
if (sample2.xformOpOrder[0] != sample.xformOpOrder[0])
{
throw new Exception("XformOpOrder do not match");
}
}
public static void XformTest()
{
var sample = new USD.NET.Unity.XformSample();
var sample2 = new USD.NET.Unity.XformSample();
sample.transform = Matrix4x4.identity;
WriteAndRead(ref sample, ref sample2, true);
AssertEqual(sample.transform, sample2.transform);
AssertEqual(sample.xformOpOrder, sample2.xformOpOrder);
// Matrix4x4.TRS cannot be used outside of of the actual Unity runtime.
// Using GfMatrix here instead.
var m = new pxr.GfMatrix4d();
m.SetScale(new pxr.GfVec3d(8, 9, 10));
m.SetTranslateOnly(new pxr.GfVec3d(1, 2, 3));
m.SetRotateOnly(new pxr.GfQuatd(4, 5, 6, 7));
sample.transform = USD.NET.Unity.UnityTypeConverter.FromMatrix(m);
sample2 = new USD.NET.Unity.XformSample();
WriteAndRead(ref sample, ref sample2, true);
AssertEqual(sample.transform, sample2.transform);
AssertEqual(sample.xformOpOrder, sample2.xformOpOrder);
sample.ConvertTransform();
sample2 = new USD.NET.Unity.XformSample();
WriteAndRead(ref sample, ref sample2, true);
AssertEqual(sample.transform, sample2.transform);
AssertEqual(sample.xformOpOrder, sample2.xformOpOrder);
sample.ConvertTransform();
sample2.ConvertTransform();
AssertEqual(sample.transform, sample2.transform);
AssertEqual(sample.xformOpOrder, sample2.xformOpOrder);
}
public void SetupScene()
{
InitUsd.Initialize();
// Is the stage already loaded?
if (m_scene != null && m_scene.Stage.GetRootLayer().GetIdentifier() == m_usdFile)
{
return;
}
// Does the path exist?
if (!System.IO.File.Exists(m_usdFile))
{
return;
}
// Clear out the old scene.
UnloadGameObjects();
// Load the new scene.
m_scene = Scene.Open(m_usdFile);
if (m_scene == null)
{
throw new Exception("Failed to load");
}
// Set the time at which to read samples from USD.
m_scene.Time = 0;
// Handle configurable up-axis (Y or Z).
Vector3 up = GetUpVector(m_scene);
var rootXf = new GameObject("root");
rootXf.transform.SetParent(transform, worldPositionStays: false);
if (up != Vector3.up)
{
rootXf.transform.localRotation = Quaternion.FromToRotation(Vector3.up, up);
}
// Convert from right-handed (USD) to left-handed (Unity).
// The math below works out to either (1, -1, 1) or (1, 1, -1), depending on up.
rootXf.transform.localScale = up + -1 * (Vector3.one - up - Vector3.right) + Vector3.right;
// Assign this transform as the root.
m_primMap.Add("/", rootXf);
// Load transforms.
foreach (var path in m_scene.AllXforms)
{
var xf = new USD.NET.Unity.XformSample();
m_scene.Read(path, xf);
var go = new GameObject(path.GetName());
AssignTransform(xf, go);
AssignParent(path, go);
}
// Load meshes.
foreach (var path in m_scene.AllMeshes)
{
var mesh = new USD.NET.Unity.MeshSample();
m_scene.Read(path, mesh);
var go = new GameObject(path.GetName());
AssignTransform(mesh, go);
AssignParent(path, go);
BuildMesh(mesh, go);
}
// Load cameras.
foreach (var prim in m_scene.Stage.GetAllPrimsByType("Camera"))
{
pxr.UsdGeomCamera camera = new pxr.UsdGeomCamera(prim);
var go = new GameObject(prim.GetName());
var xf = new USD.NET.Unity.XformSample();
m_scene.Read(prim.GetPath(), xf);
AssignTransform(xf, go);
BuildCamera(camera, go);
AssignParent(prim.GetPath(), go);
}
// Ensure the file and the identifier match.
m_usdFile = m_scene.Stage.GetRootLayer().GetIdentifier();
}
void Update()
{
if (string.IsNullOrEmpty(m_usdFile))
{
if (m_scene == null)
{
return;
}
m_scene.Close();
m_scene = null;
UnloadGameObjects();
return;
}
// Is the stage already loaded?
if (m_scene != null && m_scene.Stage.GetRootLayer().GetIdentifier() == m_usdFile)
{
return;
}
// Does the path exist?
if (!System.IO.File.Exists(m_usdFile))
{
return;
}
// Clear out the old scene.
UnloadGameObjects();
// Import the new scene.
m_scene = Scene.Open(m_usdFile);
if (m_scene == null)
{
throw new Exception("Failed to import");
}
// Set the time at which to read samples from USD.
m_scene.Time = m_usdTime;
// Handle configurable up-axis (Y or Z).
Vector3 up = GetUpVector(m_scene);
var rootXf = new GameObject("root");
if (up != Vector3.up)
{
rootXf.transform.localRotation = Quaternion.FromToRotation(Vector3.up, up);
}
// Convert from right-handed (USD) to left-handed (Unity).
// The math below works out to either (1, -1, 1) or (1, 1, -1), depending on up.
rootXf.transform.localScale = -1 * up + -1 * (Vector3.one - up);
// Assign this transform as the root.
m_primMap.Add("/", rootXf);
// Import transforms.
foreach (var path in m_scene.AllXforms)
{
var xf = new USD.NET.Unity.XformSample();
m_scene.Read(path, xf);
var go = new GameObject(path.GetName());
AssignTransform(xf, go);
AssignParent(path, go);
}
// Import meshes.
foreach (var path in m_scene.AllMeshes)
{
var mesh = new USD.NET.Unity.MeshSample();
m_scene.Read(path, mesh);
var go = new GameObject(path.GetName());
AssignTransform(mesh, go);
AssignParent(path, go);
BuildMesh(mesh, go);
}
// Ensure the file and the identifier match.
m_usdFile = m_scene.Stage.GetRootLayer().GetIdentifier();
}
// Convert Matrix4x4 into TSR components.
void AssignTransform(USD.NET.Unity.XformSample xf, GameObject go)
{
go.transform.localPosition = ExtractPosition(xf.transform);
go.transform.localScale = ExtractScale(xf.transform);
go.transform.localRotation = ExtractRotation(xf.transform);
}
