Implement swimming v2

[JaXt0r]

Todos

• Check when player is under water (Ray cast + check if water is around us?)
• Alter fall down gravity when in water (slowly going up)
• implement arm swimming. References:
  • Reference game: Subside
  • Reference implementation: https://youtu.be/ViQzKZvYdgE?si=QW4ehbjX4XPt5x3C

Bonus (split into separate issues if needed):

• Alter sight when under water (dive feeling)
• When on the surface, do not dive under automatically. Only with a button click or certain force
• Disable backpack (etc.) when in water
• Bubbles around player (Let's see... Billboards might look awkward)
• Implement air bar below player
• Rotate player collider when in water --> 1.8m height to rotating 90° flat (otherwise we can't swim out in areas like Xardas old tower inside.) -> implementation: keep CharacterController, but raise steep offset to "hop" on top of water
• Handle swim and dive grips separately per hand
• Only handle swim movement of hand, when underwater.+

Bugfixing

• synthetic rotation via thumbstick breaks arm swim
• Shader change of objects (world mesh done, objects to follow)
• Try with 3D bubbles. 2d ones look awkward in VR..
• Experiment with alpha of drowning values. 0.8f is quite bright. Maybe go with 0.9f? -> 0.8f is fine. Otherwise it's too pitch black.