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Redo light.cpp.

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Remake the light_decode_table.

The table starts out without pre-filled in values since those
are always discarded by the code apparently. We calculate a
pseudo curve with gamma power function, and then apply a new
adjustment table.

The adjustment table is setup to make the default gamma of 2.2
look decent: not too dark at light level 3 or so, but too dark
at 1 and below to be playable. The curve is much smoother than
before and looks reasonable at the whole range, offering a
pleasant decay of light levels away from lights.

The `display_gamma` setting now actually does something logical:
the game is darker at values below 2.2, and brighter at values
above 2.2. At 3.0, the game is very bright, but still has a good
light scale. At 1.1 or so, the bottom 5 light levels are virtually
black, but you can still see enough detail at light levels 7-8,
so the range and spread is adequate.

I must add that my monitor is somewhat dark to begin with, since
I have a `hc` screen that doesn't dynamic range colors or try to
pull up `black` pixels for me (it is tuned for accurate color and
light levels), so this should look even better on more dynamic
display tunings.
This commit is contained in:
Auke Kok 2016-12-08 17:37:13 -08:00 • committed by Auke Kok
parent 5a0a59ad46
commit 094a5a73d3
4 changed files with 28 additions and 331 deletions
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2
src/defaultsettings.cpp
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@ -112,7 +112,7 @@ void set_default_settings(Settings *settings)
settings->setDefault("leaves_style", "fancy");
settings->setDefault("connected_glass", "false");
settings->setDefault("smooth_lighting", "true");
settings->setDefault("display_gamma", "1.8");
settings->setDefault("display_gamma", "2.2");
settings->setDefault("texture_path", "");
settings->setDefault("shader_path", "");
settings->setDefault("video_driver", "opengl");