Integrating LeapMotion prefabs into Unity project using Vive and SteamVR

[croneecoglab]

I have an existing Unity project that works with the HTC Vive by using SteamVR plugin. I would like to incorporate LeapMotion into the project so that I can also have hand tracking. I am having problems integrating the LMHeadMountedRig into the project. I have removed the CameraRig prefab that came with SteamVR. I am using the LMHeadMountedRig prefab instead, and I have added the SteamVR_Camera and SteamVR_CameraFlip scripts to the CenterEyeAnchor of the LMHeadMountedRig. Here is a picture of the hierarchy in unity:

When I play the scene, I can look around the scene by moving my head around, and the LeapMotion controller tracks my hand movements. But, the hand model in the scene only stays in one position. The hands do not appear in front of my face, and do not move around as I move my head around. How do I setup the LeapMotion prefabs in unity so that my hands are tracked and displayed as they are moving in real space? Is there something wrong in how I am using SteamVR and LMHeadMountedRig together?

Thanks in advance for any help.

[Joe_Ward]

The LMHeadMountedRig relies on the Unity VR code to move the CenterEyeAnchor in the scene with the head -- and this moves the LeapSpace around with the head, giving you proper hand positioning. It seems likely that the SteamVR code doesn't use the same mechanism so that the LeapSpace and LeapHandController just get left in one spot in the scene.

You might have better luck starting with the SteamVR camera rig setup and adding Leap Motion components to it, as described here: https://developer.leapmotion.com/documentation/unity/unity/Unity_Custom_Rig.html

I haven't tried it with the SteamVR plugin, though, so would be curious to see how you fare.

[croneecoglab]

I will try following the Custom Rig instructions. It has to work with the SteamVR plugin somehow, because HTC Vive VR demos from Leap Motion do work. It would be nice if I could open up and see the unity project files for those demos.

[Joe_Ward]

We use the built-in Unity VR support for the Vive.

[croneecoglab]

How are the demo scenes projected inside the Vive headset without using the SteamVR code?

[Joe_Ward]

Unity 5.4 includes built-in support for Vive (it is the OpenVR option under "Virtual Reality SDKs" in the Player Settings).

And, FWIW, here is a full example project that supports both Oculus and Vive: https://github.com/leapmotion/InteractionEngine101

[belgiansteve]

I'm having a similar problem: Trying to use leap hand controller with SteamVR. It looks like the Unity_Custom_Rig link above doesn't work anymore, so I'm hoping that someone can give an updated link or answer my question below.
I added the LeapHandController as a child of the SteamVR "CameraRig\Camera (head)" object. Added an empty HandModels gameobject as a child of the CameraRig and added two hand models as children. Then, added the HandModels and the two hands to the controller's pool. This allows me to see the hands, but it looks like the hands are upside down and don't track correctly. Anything else I need to do to get this to work correctly. Thanks!

[dpradell]

I'm having the same problem but i'm using FOVE HMD. I've tried adding Leap components to FOVE rig and viceversa but leap hands stay in the same place

[dpradell]

Could anybody from the team facilitate some information? Considering that the old link about creating a customized VR rig doesn't work anymore, it would be really helpful. Thanks!

[gwinnc]

This link works for custom rig as of right now.
https://developer-archive.leapmotion.com/documentation/v2/unity/unity/Unity_Custom_Rig.html