Jamie Greunbaum
8eaef49f2e
- Moved video screen into its own separate movie tent. - Adjusted stable post-processing volume. - Chickens are now at full volume. - Added button to toggle chickens off and on.
72 lines
3.3 KiB
HLSL
72 lines
3.3 KiB
HLSL
// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
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#ifndef UNITY_IMAGE_BASED_LIGHTING_INCLUDED
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#define UNITY_IMAGE_BASED_LIGHTING_INCLUDED
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#include "UnityStandardUtils.cginc"
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// ----------------------------------------------------------------------------
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// GlossyEnvironment - Function to integrate the specular lighting with default sky or reflection probes
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// ----------------------------------------------------------------------------
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struct Unity_GlossyEnvironmentData
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{
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// - Deferred case have one cubemap
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// - Forward case can have two blended cubemap (unusual should be deprecated).
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// Surface properties use for cubemap integration
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half roughness; // CAUTION: This is perceptualRoughness but because of compatibility this name can't be change :(
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half3 reflUVW;
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};
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// ----------------------------------------------------------------------------
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Unity_GlossyEnvironmentData UnityGlossyEnvironmentSetup(half Smoothness, half3 worldViewDir, half3 Normal, half3 fresnel0)
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{
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Unity_GlossyEnvironmentData g;
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g.roughness /* perceptualRoughness */ = SmoothnessToPerceptualRoughness(Smoothness);
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g.reflUVW = reflect(-worldViewDir, Normal);
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return g;
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}
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// ----------------------------------------------------------------------------
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half perceptualRoughnessToMipmapLevel(half perceptualRoughness)
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{
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return perceptualRoughness * UNITY_SPECCUBE_LOD_STEPS;
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}
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// ----------------------------------------------------------------------------
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half mipmapLevelToPerceptualRoughness(half mipmapLevel)
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{
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return mipmapLevel / UNITY_SPECCUBE_LOD_STEPS;
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}
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// ----------------------------------------------------------------------------
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half3 Unity_GlossyEnvironment (UNITY_ARGS_TEXCUBE(tex), half4 hdr, Unity_GlossyEnvironmentData glossIn)
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{
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half perceptualRoughness = glossIn.roughness /* perceptualRoughness */ ;
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// TODO: CAUTION: remap from Morten may work only with offline convolution, see impact with runtime convolution!
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// For now disabled
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#if 0
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float m = PerceptualRoughnessToRoughness(perceptualRoughness); // m is the real roughness parameter
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const float fEps = 1.192092896e-07F; // smallest such that 1.0+FLT_EPSILON != 1.0 (+1e-4h is NOT good here. is visibly very wrong)
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float n = (2.0/max(fEps, m*m))-2.0; // remap to spec power. See eq. 21 in --> https://dl.dropboxusercontent.com/u/55891920/papers/mm_brdf.pdf
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n /= 4; // remap from n_dot_h formulatino to n_dot_r. See section "Pre-convolved Cube Maps vs Path Tracers" --> https://s3.amazonaws.com/docs.knaldtech.com/knald/1.0.0/lys_power_drops.html
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perceptualRoughness = pow( 2/(n+2), 0.25); // remap back to square root of real roughness (0.25 include both the sqrt root of the conversion and sqrt for going from roughness to perceptualRoughness)
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#else
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// MM: came up with a surprisingly close approximation to what the #if 0'ed out code above does.
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perceptualRoughness = perceptualRoughness*(1.7 - 0.7*perceptualRoughness);
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#endif
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half mip = perceptualRoughnessToMipmapLevel(perceptualRoughness);
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half3 R = glossIn.reflUVW;
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half4 rgbm = UNITY_SAMPLE_TEXCUBE_LOD(tex, R, mip);
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return DecodeHDR(rgbm, hdr);
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}
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#endif // UNITY_IMAGE_BASED_LIGHTING_INCLUDED |