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- Fix OpenGL software diminishing light to be identical to truecolor swrenderer and softpoly

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All there is left is to make globVis an uniform and move the LightVisibility::SetVisibility calculations out of the software renderer.
That will make it 100% correct for all r_visiblity values and aspect ratios.
This commit is contained in:
Magnus Norddahl 2017-06-22 00:01:57 +02:00
parent a6b7ce00c2
commit 28acf2ad06
1 changed files with 12 additions and 17 deletions
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29
wadsrc/static/shaders/glsl/main.fp
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@ -103,34 +103,29 @@ vec4 getTexel(vec2 st)
//===========================================================================
float R_DoomLightingEquation(float light)
{
// Calculated from r_visibility. It differs between walls, floor and sprites.
// globVis = WallVisibility / r_viewwindow.FocalTangent / 32.0
//
// Wall: globVis = r_WallVisibility
// Floor: r_FloorVisibility / abs(plane.Zat0 - ViewPos.Z)
// Sprite: same as wall
// All are calculated in R_SetVisibility and seem to be decided by the
// aspect ratio amongst other things.
//
// 1706 is the value for walls on 1080p 16:9 displays.
float globVis = 1706.0;
// WallVisibility is calculated in LightVisibility::SetVisibility
// 1706 is the default value for WallVisibility on 1080p 16:9 displays.
float globVis = 1706.0 / 1.3333333333333333 / 32.0;
/* L is the integer light level used in the game */
// L is the integer light level used in the game
float L = light * 255.0;
/* z is the depth in view/eye space, positive going into the screen */
// z is the depth in view/eye space, positive going into the screen
float z = pixelpos.w;
/* The zdoom light equation */
float vis = globVis / z;
float shade = 64.0 - (L + 12.0) * 32.0/128.0;
// The zdoom light equation
float vis = min(globVis / z, 24.0 / 32.0);
float shade = 2.0 - (L + 12.0) / 128.0;
float lightscale;
if (uPalLightLevels != 0)
lightscale = clamp(float(int(shade - min(24.0, vis))) / 32.0, 0.0, 31.0/32.0);
lightscale = float(int(shade - vis));
else
lightscale = clamp((shade - min(24.0, vis)) / 32.0, 0.0, 31.0/32.0);
lightscale = shade - vis;
// Result is the normalized colormap index (0 bright .. 1 dark)
return lightscale;
return clamp(lightscale, 0.0, 31.0 / 32.0);
}
//===========================================================================