Software ripples for GL renderer

[a1batross]

We just update textures here.

This version differs from my older version I did for Yamagi Quake 2, just to be sure, I rechecked it with decompile and compared it against original sw.dll, that's why it uses only 64x64 despite drawing texture at 128x128.

I want this merged with the current CPU-based solution, as I believe someone smart will later make a GPU-based solution, and we would be able to compare if it will be any better.

[a1batross]

Comparison:

Usual ref_gl water:

glwater_in_gl.mp4

Software water in WON Half-Life:

swwater_in_swdll_pixelated.mp4

Software water in ref_gl (with nearest filter):

swwater_in_gl_pixelated.mp4

Software water in ref_gl (with linear filter):

swwater_in_gl.mp4

[SNMetamorph]

I think we need to add "authentic water" option checkbox to video settings.

[Magic-Nipples]

Works like a charm!! Thanks so much for getting this ported to xash and making it work in gl!!

[a1batross]

Made faster version that only uploads texture of a selected size. So on green sludge texture which is 128x128, it will generate 128x128 texture (viewable in full glory with r_ripple 2), and usual water texture which is 64x64, will render in 64x64.

In mainui_cpp there is a checkbox in Video Options now that toggles r_ripple between 0 and 1.

That's why I said better not take this code yet :)