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Help Wanted Unity Mars Image Tracking

Discussion in 'Unity MARS' started by eyearth, Dec 15, 2020.

  1. eyearth

    eyearth

    Joined:
    Sep 27, 2018
    Posts:
    4
    When you trace the image, the child's script is called.

    private void Start()
    {
    _pyramid.gameObject.SetActive(true);
    }


    It goes well so far.

    But

    When I disable the pyramid and trace the image again, the script is not called.

    Can't I deactivate the child object if the camera loses the image?
     
    Last edited: Dec 15, 2020
  2. andysdds

    andysdds

    Joined:
    Aug 29, 2019
    Posts:
    11
    In Mars , they have a statue call
    Code (CSharp):
    1. MARSTrackingState
    can return the if camera lose the image or focus
     
  3. eyearth

    eyearth

    Joined:
    Sep 27, 2018
    Posts:
    4

    Can you tell me more about MARSTrackingState?
     
  4. andysdds

    andysdds

    Joined:
    Aug 29, 2019
    Posts:
    11
    Inside MARSSession script have a variable call "m_Subscriber" , it is a IProvidesMarkerTracking .
    Now , you can subscribe you custom action using "SubscribeMarkerUpdated" with m_Subscriber .
    like this
    Code (CSharp):
    1. Action<MRMarker> customUpdateEvent;
    2.  
    3. customUpdateEvent = (MRMarker marker) =>
    4. {
    5. marker.trackingState // <= this is the state
    6.  
    7. };
    8.  
    9. m_Subscriber.SubscribeMarkerUpdated (customUpdateEvent);
    You can check the trackingState with MARSTrackingState , and you can do the magic.
     
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