XR mode feature requests

[slimbuck]

This is taken from https://forum.playcanvas.com/t/feature-suggestions-for-the-vr-viewer/39636

I have a few suggestions that could improve the experience:

• Quality/Resolution Setting - Some splats ran poorly in the Quest 3 browser, so having performance presets or quality controls would help.
• Scaling Option - A way to zoom in and out of the splats would make exploration much more flexible.
• Fly Controls - Currently, movement is locked to a flat plane. Free-flying or vertical movement would be great to navigate more complex scenes.
• Snap Turn - A simple 30° snap turn option would really help with orientation.
• Exit Button - A way to exit directly via controller input would be useful, especially when performance drops or the app lags.
• Splat Editor in VR - The recently released SplatShop app shows exciting potential—having a VR editing mode would be incredible!

[slimbuck]

Also note the updates requested in playcanvas/supersplat#417

[Bleenctrl]

Hi - I think the list above pretty much covers what we need but I had some suggestions on the button mapping for the Quest controller! I'm not a dev so I'm sorry if anything is tricky to implement - it all sounds easy to me and I'm sure I get that wrong a LOT of the time.

But being able to navigate splats in Supersplat WebXR viewer by using a config along these lines would be fantastic. VR viewing is surely going to increase and this will make the VR viewer even better.

MOVEMENT CONTROLS:

Left thumbstick - horizontal plane movement:
Push stick forward / pull back = Move forward and backward horizontally
Push stick left and right: strafe left and right

Right thumbstick:
Push stick forward and back: move vertically up and down
Push stick left and right: snap turn (if possible, option to set angle in settings, otherwise 30 would work, and have option for smooth turn too)

Please don't set too slow a speed for flying movement since some splats (e.g. scenes) can be large. That said, motion can cause sickness so ideally the speed could be user-set in settings. A slider would be good since that is quickly adjustable and users may want to alter the speed frequently.

ROTATION CONTROLS:
Use the grip button in conjunction with the thumbsticks to alter x, y and z rotation of the splat.

Suggested config:
Left-hand controller: x and y rotation using thumbstick (left-right and up-down respectively) with grip button held down
Right-hand controller: z rotation

SCALING:
Trigger button plus left thumbstick up and down to make the splat scale larger or smaller.

It would be good for the speed of scaling to accelerate while the button is held, whereas small constant changes to scale can be achieved by repeatedly pushing the stick instead of holding it in position.

USER OPTIONS:
Maybe there could be more but to summarise:
Have an easy-open menu in the viewer (e.g. press the A button to open and close)

1. Turning - Snap turn angle, user sets increments of 30 degrees OR chooses smooth rotation
2. Flying speed - slider going 1 to 10. 10 should be very fast since some splats are enormous