/* Returns the VR Center Eye Transform information interpolated to the given leap timestamp. If the desired
* timestamp is outside of the recorded range, interpolation will fail and the returned transform will not
* have the desired time.
*/
private TransformData transformAtTime(long time)
{
if (_history.Count == 0)
{
return(new TransformData()
{
leapTime = 0,
localPosition = Vector3.zero,
localRotation = Quaternion.identity
});
}
if (_history[0].leapTime >= time)
{
// Expect this when using LOW LATENCY image retrieval, which can yield negative latency estimates due to incorrect clock synchronization
return(_history[0]);
}
int t = 1;
while (t < _history.Count &&
_history[t].leapTime <= time)
{
t++;
}
if (!(t < _history.Count))
{
// Expect this for initial frames which will have a very low frame rate
return(_history[_history.Count - 1]);
}
return(TransformData.Lerp(_history[t - 1], _history[t], time));
}
/// <summary>
/// Estimates the transform of this gameObject at the specified time
/// </summary>
/// <returns>
/// A transform with leapTime == time only if interpolation was possible
/// </returns>
protected TransformData TransformAtTime(long time)
{
if (history.Count < 1)
{
//Debug.LogWarning ("NO HISTORY!");
return(new TransformData()
{
leapTime = 0,
position = Vector3.zero,
rotation = Quaternion.identity
});
}
if (history [0].leapTime >= time)
{
// Expect this when using LOW LATENCY image retrieval, which can yield negative latency estimates due to incorrect clock synchronization
//if (history [0].leapTime > time) Debug.LogWarning("NO INTERPOLATION: Using earliest time = " + history[0].leapTime + " > time = " + time);
return(history[0]);
}
int t = 1;
while (t < history.Count &&
history[t].leapTime <= time)
{
t++;
}
if (!(t < history.Count))
{
// Expect this for initial frames which will have a very low frame rate
if (history[history.Count - 1].leapTime < time)
{
Debug.LogWarning("NO INTERPOLATION: Using most recent time = " + history[history.Count - 1].leapTime + " < time = " + time);
}
return(history[history.Count - 1]);
}
return(TransformData.Lerp(history[t - 1], history[t], time));
}
