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water gamma correction

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scrawl 2012-09-22 16:52:53 +02:00
parent b9a3f8e8d7
commit dbf59d14dc
1 changed files with 12 additions and 10 deletions
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22
files/materials/water.shader
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@ -123,9 +123,9 @@
#define REFR_BUMP 0.06 // refraction distortion amount
#define SCATTER_AMOUNT 3.0 // amount of sunlight scattering
#define SCATTER_COLOUR float3(0.0,1.0,0.95) // colour of sunlight scattering
#define SCATTER_COLOUR gammaCorrectRead(float3(0.0,1.0,0.95)) // colour of sunlight scattering
#define SUN_EXT float3(0.45, 0.55, 0.68) //sunlight extinction
#define SUN_EXT gammaCorrectRead(float3(0.45, 0.55, 0.68)) //sunlight extinction
#define SPEC_HARDNESS 256 // specular highlights hardness
@ -177,6 +177,7 @@
shUniform(float4, sunPosition) @shAutoConstant(sunPosition, light_position, 0)
shUniform(float4, sunSpecular) @shAutoConstant(sunSpecular, light_specular_colour, 0)
shUniform(float, gammaCorrection) @shSharedParameter(gammaCorrection, gammaCorrection)
shUniform(float, renderTargetFlipping) @shAutoConstant(renderTargetFlipping, render_target_flipping)
@ -242,7 +243,7 @@
float s = shSaturate(dot(lR, vVec)*2.0-1.2);
float lightScatter = shSaturate(dot(-lVec,lNormal)*0.7+0.3) * s * SCATTER_AMOUNT * waterSunFade_sunHeight.x * shSaturate(1.0-exp(-waterSunFade_sunHeight.y));
float3 scatterColour = shLerp(float3(SCATTER_COLOUR)*float3(1.0,0.4,0.0), SCATTER_COLOUR, shSaturate(1.0-exp(-waterSunFade_sunHeight.y*SUN_EXT)));
float3 scatterColour = shLerp(float3(SCATTER_COLOUR)*gammaCorrectRead(float3(1.0,0.4,0.0)), SCATTER_COLOUR, shSaturate(1.0-exp(-waterSunFade_sunHeight.y*SUN_EXT)));
// fresnel
float ior = (cameraPos.y>0)?(1.333/1.0):(1.0/1.333); //air to water; water to air
@ -251,7 +252,7 @@
fresnel = shSaturate(fresnel);
// reflection
float3 reflection = shSample(reflectionMap, screenCoords+(normal.xz*REFL_BUMP)).rgb;
float3 reflection = gammaCorrectRead(shSample(reflectionMap, screenCoords+(normal.xz*REFL_BUMP)).rgb);
// refraction
float3 R = reflect(vVec, normal);
@ -262,8 +263,7 @@
float refractDepth = shSample(depthMap, screenCoords-(shoreFade * normal.xz*REFR_BUMP)).x * far - depthPassthrough;
float doRefraction = (refractDepth < 0) ? 0.f : 1.f;
float3 refraction = float3(0,0,0);
refraction.rgb = shSample(refractionMap, (screenCoords-(shoreFade * normal.xz*REFR_BUMP * doRefraction))*1.0).rgb;
float3 refraction = gammaCorrectRead(shSample(refractionMap, (screenCoords-(shoreFade * normal.xz*REFR_BUMP * doRefraction))*1.0).rgb);
// brighten up the refraction underwater
refraction = (cameraPos.y < 0) ? shSaturate(refraction * 1.5) : refraction;
@ -281,12 +281,12 @@
{
float waterSunGradient = dot(-vVec, -lVec);
waterSunGradient = shSaturate(pow(waterSunGradient*0.7+0.3,2.0));
float3 waterSunColour = float3(0.0,1.0,0.85)*waterSunGradient * 0.5;
float3 waterSunColour = gammaCorrectRead(float3(0.0,1.0,0.85))*waterSunGradient * 0.5;
float waterGradient = dot(-vVec, float3(0.0,-1.0,0.0));
waterGradient = clamp((waterGradient*0.5+0.5),0.2,1.0);
float3 watercolour = (float3(0.0078, 0.5176, 0.700)+waterSunColour)*waterGradient*2.0;
float3 waterext = float3(0.6, 0.9, 1.0);//water extinction
float3 watercolour = (gammaCorrectRead(float3(0.0078, 0.5176, 0.700))+waterSunColour)*waterGradient*2.0;
float3 waterext = gammaCorrectRead(float3(0.6, 0.9, 1.0));//water extinction
watercolour = shLerp(watercolour*0.3*waterSunFade_sunHeight.x, watercolour, shSaturate(1.0-exp(-waterSunFade_sunHeight.y*SUN_EXT)));
float darkness = VISIBILITY*2.0;
@ -299,9 +299,11 @@
else
{
float fogValue = shSaturate((depthPassthrough - fogParams.y) * fogParams.w);
shOutputColour(0).xyz = shLerp (shOutputColour(0).xyz, fogColor, fogValue);
shOutputColour(0).xyz = shLerp (shOutputColour(0).xyz, gammaCorrectRead(fogColor), fogValue);
}
shOutputColour(0).xyz = gammaCorrectOutput(shOutputColour(0).xyz);
shOutputColour(0).w = 1;
}