How To Grab Around An Object

  • Hi Allan!

    For the example you shared in the 3D Hand Interaction template. The 'grab' action is described in the SingleGestureTrigger script in the getGesture() function.

    This script basically just sends out behavior triggers when the action described in getGesture() is detected, in this case, it is when thumb, index and mid fingers are closed together (to compose a Grab action).

    If you want a more defined hand gesture as the grab trigger, feel free to check out the pre-defined examples under Gesture Triggers. There is no pre-defined grab trigger, but you can duplicate an existing gesture and customize its conditions to create your own custom gesture.

    In this way you can define hand gestures in more refined details, customize the hand position requirement based on thresholds provided in the GetJointsDistance script, provided on child objects under each gesture in Gesture Triggers.

    Then the SetFollowHandHelper script sets an object to follow certain median points of the hand on certain trigger. If you make sure the triggers here match the triggers in SingleGestureTrigger script, then these 2 scripts working hand-in-hand together would create a 'grab and follow' effect.

    The SetFollowHandHelper script also can have conditions on hand follow, in the example we provided in template, the Follow Condition in SetFollowHandHelper is set to Distance & Trigger, which means when the trigger gets detected the object also needs to be within certain distance in order for the grab action to work. You can see the distance with distance logger script attached to the Distance Indicator object right under the Set Follow Hand Helper object.

    Also you would need to keep the 'grabbed' action in order for the object to follow your hand in 3D space.

    You may also turn on Show Joints and Show Bones in Left and Right Hand Tracking script under Tracking Managers. It will help indicate if your hand is tracked in scene so that you can pinpoint the problems when grab is not detected to see if it is because hand has lost tracking.

    Feel free to give these methods a try, and let me know if you have any additional questions related to hand tracking!

    Comment actions Permalink
Have a comment?

Please sign in to leave a comment.

We're here to help! We just need a little bit of information...

What system are you using?

Have you downloaded the latest version of Lens Studio?

Please download the latest version of Lens Studio. If you still run into this issue, please come back and report it!

Is this issue causing Lens Studio to crash?

What system do you run Lens Studio on?



Follow the next steps to help us solve your issue:

  • Copy and paste this text into your TerminalCommand Window
    open ~/Library/Preferences/Snap/Lens\ Studio/ %LOCALAPPDATA%\Snap\Lens Studio Copy Text
  • Press ReturnEnter to run the command. The Lens Studio folder will automatically open
  • Prepare to upload your files: zip the "Log" Folder by right-clicking and choosing "compress."
    Locate the Log.txt file right above it.

    Attach a screenshot of the issue:



What is this most relevant to?

Please enter a brief description of your issue:

Thanks for submitting this issue.

Unfortunately, it's likely due to the operating system or hardware you're using – since they don't meet the system requirements for Lens Studio.

Still, we hear you loud and clear, and are logging the issue in case there's ever a workaround we can provide!

Minimum Requirements

Operating System: Windows 10 (64 bit); MacOS 10.11+

Hardware: Minimum of Intel Core i3 2.5Ghz or AMD Phenom II 2.6Ghz with 4 GB RAM; Intel HD Graphics 4000 / Nvidia GeForce 710 / AMD Radeon HD 6450 or better; screen resolution of 1280x768 or higher

We'll try to resolve this issue as soon as possible. Thanks for letting us know about it!

Keep an eye out for a followup email from us. We may have a couple more questions for you, or we might already have a solution to offer.

Happy creating!