v77 Grab Hand Pose Translation/Rotation
Hi, I'm using v77 of the Interaction SDK in Unreal 5.5.4 for hand tracking, and am having issues with a HandGrabPose not following the grab location/rotation when using rotation and location transformers. I am using an object setup with multiple grabbable pieces. My blueprint hierarchy is essentially: Mesh -- GrabbableComponent1 -- SubMesh ---- GrabbableComponent2 ------ HandGrabPose GrabTransformer1 (for main mesh, with free transformer) GrabTransformer2 (for sub mesh, with translate constraint applied) The actual interactions of the meshes work without issue. I can grab the main mesh, and grab the submesh to move it with its translation applied. My HandGrabPose component has the following properties set: The initial posing is fine and the hand will move to the intended pose position, but as the submesh is moved, the hand pose stays in the same location rather than following the submesh as I would like. Looking at the source for hand poses, I can see that the hand pose override is set via a call in OculusInteractionPrebuilts/Rig/IsdkHandPoseRigModifier to HandMeshComponent->SetHandPoseOverride once the grab state changes to Selected, but as this is only called upon initial grab, the required RootPoseOffset does not get updated upon translation/rotation of the grabbed component. This is not an issue for components with only one grabbable where the entire object will be moved and thus the offset remains constant, but for my case with sub-objects the pose offset obviously does change but the hand remains in its initial location. Has anyone run into a similar issue and could recommend a solution or workaround? I'd be happy to provide more information on my setup if needed. Thanks!
HMD Recenter Delegate in UE5.4 with hand tracking gesture
We have upgraded to engine 5.4 to get the HMD recenter delegate working again, as noted elsewhere https://forums.unrealengine.com/t/recenter-event/747484. We now get recenter events when using the Oculus button on the controllers, but we do not get any recenter events when using hand tracking and doing the recenter gesture. We are listening for both HMD Recentered and VRController Recentered and not receiving either of them with the hand tracking recenter gesture. Is this on the roadmap for a fix or is there something I can do to work around it?
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What are the differences between Oculus OpenXR and Epic OpenXR ?
There are two option for OpenXR API in UE's Project Settings. One is Oculus OpenXR and another one is Epic OpenXR. I use VRE plugin and if I use Oculus OpenXR, I completely lose hand tracking functionality provided by VRE (which is amazing btw). If I use Epic OpenXR, I get everything I can wish for, except for some reason game's colors are washed out and who knows what else I miss out on (whatever special sauce Oculus OpenXR has over Epic's OpenXR). So, I am wondering what do I lose by going with Epic OpenXR over Oculus OpenXR ?
