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Grabbing physics handle with motion controller?

Development Discussion VR and AR Development
#1

I’ve been using the default grabbing BP included in the VR template. It uses the attachtocomponent node to grab objects with the controller. It has been working well, but I now want to grab a physics actor and have run into issues.

I know I need a physics handle, but am confused as to where to place it (in the object being grabbed, the motion controller - or both?). Also, because I have something working, I’m hoping I can incorporate the scripting into what I already have.

Right now, I am using the following function in the motioncontroller bp to fire an event within the object:

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Then, this is being run in the object I want to grab:

1.jpg

How can I alter this setup to work with a physics object instead of a static mesh component? From what I understand, I will want to use a ‘grab’ node instead of an attach node. And I need to incorporate a physics handle somewhere.

Any help at all is appreciated.

Thanks!

#2

I was also wanted to do this but after taking a look of what was already created here in the forum, I ended up using the “VR (OpenVR) Expansion Plugin”.

I’m also look at this project as its much more light waight and has the grip / physics already created:

I hope at some point VR with physics will become native to the engine.

#3

Problem with using Physics Handles alone, is that when you move items around, they will lag behind. While this might not be a problem for some scenarios, i found it to be anoying in the long run, so i decided to do a BP implementation of this myself without using the “VR (Open VR) Expansion Plugin”, I’ll post my findings on a few videos soon. It will combine attachto with PhysicsHandles.

#4

Yeah to avoid the lag with vanilla controllers you need to re-attach the component to get the late update, the motion controllers are lacking control over the late update ViewExtension in their default form.

#5

I noticed Robo Recall is using a custom Blueprint Interaction Component instead of Physics Handles for grabbing robots, can check out their implementation in the Mod kit if that’s helpful.