Fix type mismatch errors in shader code

[PIPIKAI]

Refactored GLSL code to avoid implicit type conversions between float and int. Explicit type casting has been added to ensure compatibility with strict compilers.

[stupxd]

seems good to me 👍 thanks for the PR

[stupxd]

tho tbf, I wonder if you'd even be able to start the vanilla game, as some vanilla shaders have the same issue you will have to override the vanilla shaders, I assume

[PIPIKAI]

I fixed this because I found that loose syntax might cause issues on the ARM architecture platform. I tested the pull request myself, and it's working fine.

[Jevonnissocoolman]

Testing this myself and so far not encountering any issues I think is good to merge, good job