[JaXt0r]

Merge order: 1a → 1b → 1c → 1d → 2a → 2b → 3a → 3b → 3c, all into engine/hvr-replacement (no stacking). Each branch still contains the commits of the earlier steps, so after the earlier PR is merged the diff of this one shrinks to its own step. Plan: Docs/HVR-replacement/.

Description

Phase 1b of the HVR → XR Interaction Toolkit (XRI) replacement: a second player rig on XRI. Default backend stays Hvr, so nothing changes for players unless DeveloperConfig.VrInteractionBackend = Xri.

• New VR - Player XRI.prefab (XR Origin, CharacterController, camera + controllers with TrackedPoseDriver, locomotion providers: move, snap/smooth turn, jump, teleport, gravity) and XriRig : IVrRig.
• Sprint and crouch are our own on top of XRI. Comfort settings (sit/stand/player height, move direction, turn type, snap degrees, smooth speed) are mapped onto the rig. Code teleports (IVrRig.Teleport) keep the requested rotation.
• Player.unity and Lab.unity hold both rigs; SetupPlayerController activates the rig of the active backend and destroys the other one. On Hvr the HVR player is now activated there too, not by being active in the scene.
• IVrBackend.OwnsRig, backend registered in DI; Gothic.VR.asmdef references Unity.XR.CoreUtils.

Not in this PR: UI/laser, fades (1c), simulator (1d), grabbing (2).

To test

• - Hvr (default): boot G1 and G2 into the world, walk/turn/menu as before. Only one player rig exists in the scene.
• - Xri (set VrInteractionBackend = Xri in your local DeveloperConfig, remember to set it back): game boots into the world, spawn position equals the Hvr one.
• - Xri: walk, sprint (left stick click), jump, crouch toggle, snap and smooth turn; accessibility menu changes (sit/stand, move direction, turn type) apply live.
• - Xri: new game spawn and Marvin goto teleport keep the facing direction; falling from a ledge lands you grounded.
• - Xri in a headset: Marvin menu on the left controller sits where you can reach it (placement is unverified).
• Known: no menu laser yet on Xri (1c), no simulator (1d), no grabbing (2).

Test on (delete if irrelevant)

• PCVR
• Mobile VR (Quest/Pico)

🤖 Generated with Claude Code

[JaXt0r]

Still needs to be tested with real VR setup.