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Diffstat (limited to 'indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl')
-rw-r--r-- | indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl | 279 |
1 files changed, 279 insertions, 0 deletions
diff --git a/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl new file mode 100644 index 0000000000..d5671a6ce4 --- /dev/null +++ b/indra/newview/app_settings/shaders/class1/deferred/softenLightF.glsl @@ -0,0 +1,279 @@ +/** + * @file softenLightF.glsl + * + * Copyright (c) 2007-$CurrentYear$, Linden Research, Inc. + * $License$ + */ + +#extension GL_ARB_texture_rectangle : enable + +uniform sampler2DRect diffuseRect; +uniform sampler2DRect specularRect; +uniform sampler2DRect positionMap; +uniform sampler2DRect normalMap; +uniform sampler2DRect depthMap; +uniform sampler2DRect lightMap; +uniform sampler2D noiseMap; +uniform samplerCube environmentMap; + +uniform float blur_size; +uniform float blur_fidelity; + +// Inputs +uniform vec4 morphFactor; +uniform vec3 camPosLocal; +//uniform vec4 camPosWorld; +uniform vec4 gamma; +uniform vec4 lightnorm; +uniform vec4 sunlight_color; +uniform vec4 ambient; +uniform vec4 blue_horizon; +uniform vec4 blue_density; +uniform vec4 haze_horizon; +uniform vec4 haze_density; +uniform vec4 cloud_shadow; +uniform vec4 density_multiplier; +uniform vec4 distance_multiplier; +uniform vec4 max_y; +uniform vec4 glow; +uniform float scene_light_strength; +uniform vec3 env_mat[3]; +uniform mat4 shadow_matrix[3]; +uniform vec4 shadow_clip; +uniform mat3 ssao_effect_mat; + +varying vec4 vary_light; +varying vec2 vary_fragcoord; + +vec3 vary_PositionEye; + +vec3 vary_SunlitColor; +vec3 vary_AmblitColor; +vec3 vary_AdditiveColor; +vec3 vary_AtmosAttenuation; + +vec3 getPositionEye() +{ + return vary_PositionEye; +} +vec3 getSunlitColor() +{ + return vary_SunlitColor; +} +vec3 getAmblitColor() +{ + return vary_AmblitColor; +} +vec3 getAdditiveColor() +{ + return vary_AdditiveColor; +} +vec3 getAtmosAttenuation() +{ + return vary_AtmosAttenuation; +} + + +void setPositionEye(vec3 v) +{ + vary_PositionEye = v; +} + +void setSunlitColor(vec3 v) +{ + vary_SunlitColor = v; +} + +void setAmblitColor(vec3 v) +{ + vary_AmblitColor = v; +} + +void setAdditiveColor(vec3 v) +{ + vary_AdditiveColor = v; +} + +void setAtmosAttenuation(vec3 v) +{ + vary_AtmosAttenuation = v; +} + +void calcAtmospherics(vec3 inPositionEye, float ambFactor) { + + vec3 P = inPositionEye; + setPositionEye(P); + + //(TERRAIN) limit altitude + if (P.y > max_y.x) P *= (max_y.x / P.y); + if (P.y < -max_y.x) P *= (-max_y.x / P.y); + + vec3 tmpLightnorm = lightnorm.xyz; + + vec3 Pn = normalize(P); + float Plen = length(P); + + vec4 temp1 = vec4(0); + vec3 temp2 = vec3(0); + vec4 blue_weight; + vec4 haze_weight; + vec4 sunlight = sunlight_color; + vec4 light_atten; + + //sunlight attenuation effect (hue and brightness) due to atmosphere + //this is used later for sunlight modulation at various altitudes + light_atten = (blue_density * 1.0 + vec4(haze_density.r) * 0.25) * (density_multiplier.x * max_y.x); + //I had thought blue_density and haze_density should have equal weighting, + //but attenuation due to haze_density tends to seem too strong + + temp1 = blue_density + vec4(haze_density.r); + blue_weight = blue_density / temp1; + haze_weight = vec4(haze_density.r) / temp1; + + //(TERRAIN) compute sunlight from lightnorm only (for short rays like terrain) + temp2.y = max(0.0, tmpLightnorm.y); + temp2.y = 1. / temp2.y; + sunlight *= exp( - light_atten * temp2.y); + + // main atmospheric scattering line integral + temp2.z = Plen * density_multiplier.x; + + // Transparency (-> temp1) + // ATI Bugfix -- can't store temp1*temp2.z*distance_multiplier.x in a variable because the ati + // compiler gets confused. + temp1 = exp(-temp1 * temp2.z * distance_multiplier.x); + + //final atmosphere attenuation factor + setAtmosAttenuation(temp1.rgb); + + //compute haze glow + //(can use temp2.x as temp because we haven't used it yet) + temp2.x = dot(Pn, tmpLightnorm.xyz); + temp2.x = 1. - temp2.x; + //temp2.x is 0 at the sun and increases away from sun + temp2.x = max(temp2.x, .03); //was glow.y + //set a minimum "angle" (smaller glow.y allows tighter, brighter hotspot) + temp2.x *= glow.x; + //higher glow.x gives dimmer glow (because next step is 1 / "angle") + temp2.x = pow(temp2.x, glow.z); + //glow.z should be negative, so we're doing a sort of (1 / "angle") function + + //add "minimum anti-solar illumination" + temp2.x += .25; + + //increase ambient when there are more clouds + vec4 tmpAmbient = ambient + (vec4(1.) - ambient) * cloud_shadow.x * 0.5; + + /* decrease value and saturation (that in HSV, not HSL) for occluded areas + * // for HSV color/geometry used here, see http://gimp-savvy.com/BOOK/index.html?node52.html + * // The following line of code performs the equivalent of: + * float ambAlpha = tmpAmbient.a; + * float ambValue = dot(vec3(tmpAmbient), vec3(0.577)); // projection onto <1/rt(3), 1/rt(3), 1/rt(3)>, the neutral white-black axis + * vec3 ambHueSat = vec3(tmpAmbient) - vec3(ambValue); + * tmpAmbient = vec4(RenderSSAOEffect.valueFactor * vec3(ambValue) + RenderSSAOEffect.saturationFactor *(1.0 - ambFactor) * ambHueSat, ambAlpha); + */ + tmpAmbient = vec4(mix(ssao_effect_mat * tmpAmbient.rgb, tmpAmbient.rgb, ambFactor), tmpAmbient.a); + + //haze color + setAdditiveColor( + vec3(blue_horizon * blue_weight * (sunlight*(1.-cloud_shadow.x) + tmpAmbient) + + (haze_horizon.r * haze_weight) * (sunlight*(1.-cloud_shadow.x) * temp2.x + + tmpAmbient))); + + //brightness of surface both sunlight and ambient + setSunlitColor(vec3(sunlight * .5)); + setAmblitColor(vec3(tmpAmbient * .25)); + setAdditiveColor(getAdditiveColor() * vec3(1.0 - temp1)); +} + +vec3 atmosLighting(vec3 light) +{ + light *= getAtmosAttenuation().r; + light += getAdditiveColor(); + return (2.0 * light); +} + +vec3 atmosTransport(vec3 light) { + light *= getAtmosAttenuation().r; + light += getAdditiveColor() * 2.0; + return light; +} +vec3 atmosGetDiffuseSunlightColor() +{ + return getSunlitColor(); +} + +vec3 scaleDownLight(vec3 light) +{ + return (light / scene_light_strength ); +} + +vec3 scaleUpLight(vec3 light) +{ + return (light * scene_light_strength); +} + +vec3 atmosAmbient(vec3 light) +{ + return getAmblitColor() + light / 2.0; +} + +vec3 atmosAffectDirectionalLight(float lightIntensity) +{ + return getSunlitColor() * lightIntensity; +} + +vec3 scaleSoftClip(vec3 light) +{ + //soft clip effect: + light = 1. - clamp(light, vec3(0.), vec3(1.)); + light = 1. - pow(light, gamma.xxx); + + return light; +} + +void main() +{ + vec2 tc = vary_fragcoord.xy; + vec3 pos = texture2DRect(positionMap, tc).xyz; + vec3 norm = texture2DRect(normalMap, tc).xyz; + vec3 nz = texture2D(noiseMap, vary_fragcoord.xy/128.0).xyz; + + float da = max(dot(norm.xyz, vary_light.xyz), 0.0); + + vec4 diffuse = vec4(texture2DRect(diffuseRect, tc).rgb, 1.0); + vec4 spec = texture2DRect(specularRect, vary_fragcoord.xy); + + vec2 scol_ambocc = texture2DRect(lightMap, vary_fragcoord.xy).rg; + float scol = scol_ambocc.r; + float ambocc = scol_ambocc.g; + + calcAtmospherics(pos.xyz, ambocc); + + vec3 col = atmosAmbient(vec3(0)); + col += atmosAffectDirectionalLight(min(da, scol)); + + col *= diffuse.rgb; + + if (spec.a > 0.2) + { + vec3 ref = reflect(pos.xyz, norm.xyz); + vec3 rc; + rc.x = dot(ref, env_mat[0]); + rc.y = dot(ref, env_mat[1]); + rc.z = dot(ref, env_mat[2]); + + vec3 refcol = textureCube(environmentMap, rc).rgb; + col.rgb += refcol * spec.rgb; + } + + col = atmosLighting(col); + col = scaleSoftClip(col); + + gl_FragColor.rgb = col; + gl_FragColor.a = 0.0; + //gl_FragColor.rg = scol_ambocc.rg; + //gl_FragColor.rgb = norm.rgb*0.5+0.5; + //gl_FragColor.rgb = vec3(ambocc); + //gl_FragColor.rgb = vec3(scol); +} |