Hand Tracking without rotation

  • Hello Kitty,

    You can use the script for attaching 3D object which you can find it here:

    https://lensstudio.snapchat.com/guides/general/tracking/object-tracking/#3d-object-tracking

    Make sure to uncheck apply rotation and it will fixed to it own rotation.

     

    Best,

    Amir

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  • Hi,

    Is it possible to lock rotation for 2D files as well or is just limited to just 3D objects?  I would like to be able to track a 2D animation to the hand with rotations locked as well. 

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  • Hey Kitty,

    I just made a project file for which is rotation is locked on the HandTracking which you can download from the link down below:

    https://storage.googleapis.com/snapchat-lens-assets/f1a09194-f02d-43ed-92b8-62e843179ff0/lensStudio/Forum-Helpers/objecttracking_lockedrotation_example.zip

    They way that is done is every frame we update the world rotation of the object to the rotation that we want. if you look at the script I added these two lines in the onUpdate() function to set the rotation every frame:

     

    function onUpdate( eventData )

    {

    if( initialized&&script.smoothFollowing )

    {

    smoothFollow( targetToFollow, script.smoothFollower , script.smoothingSpeed );

    }

    if(initialized&&screenTransform!=null)

    {

    var rot = quat.fromEulerAngles(0, 0, script.handRotation*Math.PI /180);

    screenTransform.getTransform().setWorldRotation(rot);

    }

    }
     
    Hope this will help you and have fun creating lenses.
    Best,
    Amir.
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