Log in or register to post comments

Vuforia AR Camera Freeze

August 25, 2017 - 4:04am #2

Hello,

I am using Unity with cloud detection but after a target is recognized sometimes the AR Camera freezes, this is all the usefull information I can get in XCode,

the app still seems to run though. Do you have any information on how I could solve this? It doesn't look to me that this is coming from my code.

This is happening both on iOS and Android.

Unity version 5.6.3 and Vuforia SDK v6.2.10.

 

 (Filename: /Users/builduser/buildslave/unity/build/artifacts/generated/common/runtime/DebugBindings.gen.cpp Line: 51)

Exception in callback: System.Reflection.TargetInvocationException: Exception has been thrown by the target of an invocation. ---> System.NullReferenceException: A null value was found where an object instance was required.
  at Vuforia.StateManagerImpl.UpdateTrackablePoses (UnityEngine.Transform arCameraTransform, .TrackableResultData[] trackableResultDataArray, .VuMarkTargetResultData[] vuMarkResultDataArray, TrackableIdPair originTrackableID, Int32 frameIndex) [0x00000] in <filename unknown>:0
  at Vuforia.VuforiaManagerImpl.UpdateTrackers (FrameState frameState) [0x00000] in <filename unknown>:0
  at Vuforia.VuforiaManagerImpl.Update (ScreenOrientation counterRotation, Boolean reapplyOldState) [0x00000] in <filename unknown>:0
  at Vuforia.VuforiaARController.UpdateStatePrivate (Boolean forceUpdate, Boolean reapplyOldState) [0x00000] in <filename unknown>:0
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at Vuforia.DelegateHelper.InvokeDelegate (System.Delegate action, System.Object[] args) [0x00000] in <filename unknown>:0
  --- End of inner exception stack trace ---
  at System.Reflection.MonoMethod.Invoke (System.Object obj, BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00000] in <filename unknown>:0
  at Vuforia.DelegateHelper.InvokeDelegate (System.Delegate action, System.Object[] args) [0x00000] in <filename unknown>:0
Vuforia.DelegateHelper:InvokeDelegate(Delegate, Object[])

Vuforia AR Camera Freeze

August 26, 2017 - 12:24pm #1

I have found the error in the meantime, I did not recognize that the framework deletes / clears the existing imagetargets when a new one is detected by default.

Log in or register to post comments