Eye Adaption

brussell wrote: Changelog 08.02.2018:
-simplified adaption calculation
-added saturation parameters

technique LightAdaptionRussel

Rudy102 wrote: Thanks a lot. It's a really useful shader. One question, any chances for version with UI ?

moriz1 wrote: i did however, notice that the luma value changes if i alt-tab in and out of the game window. doing this will cause the calculated luma to rise by about 0.05 in my test scene. not sure what that was about.

btw, this is the code i'm using to display the luma on screen:

float res = -0.1;

int line0[14] = { __L, __u, __m, __a, __Space, __C, __u, __r, __r, __e, __n, __t, __Colon, __Space };	//Luma Current: %d

DrawText_String(float2(100.0, 132.0), 32, 1, texcoord, line0, 14, res);
DrawText_Digit(DrawText_Shift(float2(100.0, 132.0), int2(14, 0), 32, 1), 32, 1, texcoord, 3, avglum, res);
if ( res != -0.1)
	return res;

you need to include "DrawText.fxh" for this to work. this code snippet will print "Luma Current: ####" on the top left corner of the screen.

DrawText_Digit(DrawText_Shift(float2(100.0, 132.0), int2(14, 0), 32, 1), 32, 1, texcoord, 3, 1, res);

EDIT: is it a good idea to use gamma correction? i've been using:

float CalcLuma(float3 color) {
	if (GammaCorrectionEnable) {
    	return pow((color.r*2 + color.b + color.g*3) / 6, 1/2.2);
	}
	
	return (color.r*2 + color.b + color.g*3) / 6;
}

PureEvilWindom wrote: can this effect combined with vignette ? so if you face bright light you simulate human eyes that half closed to reduce light.