[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 1c: UI, fades and swimming on the XRI rig (needs 1b). Default backend stays Hvr.

• EventSystem with XRUIInputModule on the XRI rig, one UI-only ray per controller, XriUiPointers adds a TrackedDeviceGraphicRaycaster per registered canvas and tells which hand pressed (Marvin-logo haptics).
• Own ScreenFade (shader Gothic/VR Screen Fade) and WallFade (screen darkens when the head goes into geometry) on the XRI camera. XriRig.Fade drives the screen fade; dive darkness uses it.
• Hero subtitles and status bars on the XRI camera.
• Both backends: VRCinema now locks the player during videos (it looked for VRPlayer in its parents, but Cinema is a sibling) and no longer leaves the player locked when the world load unlocks during the intro. Side effect: after the world load you can move and turn during the rest of the intro video.

To test

• - Hvr: play the intro video; you can't jump/crouch/open menu during it, and everything is usable afterwards.
• - Xri: menu laser clicks every main-menu page and the virtual keyboard; settings sliders work; Marvin logo poke vibrates the correct hand.
• - Xri: dialog with an NPC (start via menu), subtitles visible, choose an answer with the laser.
• - Xri: put your head into a wall → screen fades to black, back out → clears.
• - Xri: swim and dive (strokes, darkening with air, walking out of the water).
• Known: the stick still moves the player in water on both backends (HVR never disabled it); swim checks use the XR Origin position, which can differ from the body in room-scale.

Test on (delete if irrelevant)

• PCVR
• Mobile VR (Quest/Pico)

🤖 Generated with Claude Code

[JaXt0r]

Issues, to be resolved or changed later:

1. Head never sticks into the wall as it is blocked from going into (poking back)
2. Marvin menu is rotated wrong (fixed later, when we have a hand and actually see, where it should be placed).