Remove all references to unused shader var global_gamma.
Remove many unused decls for gamma from shaders.
Make post-deferred gamma correction use display_gamma.
Make setting display_gamma use the correct RenderDeferredDisplayGamma setting.
Fix light atten and transmittance calcs breaking ambient color contrib to fog.
Needs to be tested on DRTSIM-415 or better to get legacy viewer settings that match EEP.
Given that mShaderObjects only ever expects one copy of a given shader object (leading to lots of "shaderV" and "shaderF"), it made having utility shaders a bit more difficult to incorporate.
This change makes sure the two are separated. Using this over a multimap largely for readibility.
Also, actually, you know, use this functionality.
--HG--
branch : OPEN-340
Fix side-effects of having both sun and moon as potential directional light contributors.
We pass an int to the shader indicating which to prefer instead of making per-pixel decisions
and pass the moonlight color/di independently.
Obsolete llsettingssky fade color which was unused elsewhere and cached for no reason.
Fix bug with setting texture matrix for rigged mesh.
Fix z-fighting between sea and sky in ALM by cheating sky, stars, and moon using gl_FragDepth.
Fix handling of atmospheric haze glow w.r.t independent sun/moon positioning
(we can no longer depend on them being mutex to each other).
Prepare for using ifdef to conditionally engage using gl_FragDepth in water shaders
(because GL requires that writing to gl_FragDepth on any path means you need to
write a depth value on every path).
Further tweaking of directional shadow sampling to balance between peter-panning and shadow acne.
Move stars to just this side of the sky some to reduce parallax.
Remove decodeNormF and uses of decode_normal in favor of unified use of getNorm
(try to help the Intel HD x000 compiler learn to link correctly).
SL-9851
Fix cloud shaders to ignore clouds when cloud_scale is 0.
Fix creation of heavenly body geo to avoid degenerate vector math
and not randomly flip orientation when crossing zenith.
Add sun_up_factor to eliminate sun glow around moon when sun is down.
Modify LLSettingsFoo::buildDefaultFoo to use a static and avoid re-validation of default sky/water/daycycle settings.
Remove all references to gSun/MoonTextureId globals (they should come from sky settings now).
Make env panel update environment when jumping frame to frame.
Add separate funcs for sun/moon vectors in various coord systems.
Make haze glow only pay attention to sun (i.e. fix sun glow when moon is near horizon in daytime).
Add plumbing facilities to allow current and next moon textures to be passed to moon shader.
Modify moon shader to blend between current and next moon textures by blend factor.
Andrey Kleshchev