public bool MoveNext()
{
m_i++;
bool valid = m_i < m_paths.Length;
if (valid)
{
m_currentSample.path = m_paths[m_i];
m_currentSample.sample = new T();
m_scene.Read(m_currentSample.path, m_currentSample.sample);
}
return(valid);
}
/// Plays back a named transform onto the current transform from a usd path.
/// The transform can optionally be smoothed using exponential smoothing.
/// Smoothing will be clamped between 0 - 1.
public void StartPlayback(string sketchName = "/Sketch", string xformName = "/VideoCamera",
float smoothing = 0)
{
m_xformName = xformName;
m_Smoothing = Mathf.Clamp01(smoothing);
m_IsRecording = false;
// Older versions of Tilt Brush exported usda camera paths in decimeters. We now
// export in meters to match USD geometry export. Older versions also didn't export any sketch
// data so we check here for the presence of sketch data to decide how to treat the camera
// path units.
bool hasSketchRoot = m_Scene.Stage.GetPrimAtPath(new pxr.SdfPath(sketchName));
m_xformName = hasSketchRoot ? sketchName + xformName : xformName;
float scale = hasSketchRoot ? App.UNITS_TO_METERS : 1;
m_UnitsInMeters = hasSketchRoot;
m_Scene.Time = null;
m_UsdCameraInfo = new UsdCameraSample();
m_UsdCameraInfo.shutter = new USD.NET.Unity.CameraSample.Shutter();
m_Scene.Read(m_xformName, m_UsdCameraInfo);
m_UsdCamera = new UsdCameraXformSample();
m_Scene.Time = 0;
m_Scene.Read(m_xformName, m_UsdCamera);
var basisMat = AxisConvention.GetFromUnity(AxisConvention.kUsd)
* Matrix4x4.Scale(Vector3.one * scale);
m_UsdCamera.transform = ExportUtils.ChangeBasis(m_UsdCamera.transform, basisMat, basisMat.inverse);
TrTransform xf_WS = UsdXformToWorldSpaceXform(m_UsdCamera);
xf_WS.ToTransform(transform);
m_PlaybackCameras = FindObjectsOfType <Camera>();
}