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// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)
#ifndef UNITY_STANDARD_META_INCLUDED
#define UNITY_STANDARD_META_INCLUDED
// Functionality for Standard shader "meta" pass
// (extracts albedo/emission for lightmapper etc.)
// define meta pass before including other files; they have conditions
// on that in some places
#define UNITY_PASS_META 1
#include "UnityCG.cginc"
#include "UnityStandardInput.cginc"
#include "UnityMetaPass.cginc"
#include "UnityStandardCore.cginc"
struct v2f_meta
{
float4 uv : TEXCOORD0;
float4 pos : SV_POSITION;
};
v2f_meta vert_meta (VertexInput v)
{
v2f_meta o;
o.pos = UnityMetaVertexPosition(v.vertex, v.uv1.xy, v.uv2.xy, unity_LightmapST, unity_DynamicLightmapST);
o.uv = TexCoords(v);
return o;
}
// Albedo for lightmapping should basically be diffuse color.
// But rough metals (black diffuse) still scatter quite a lot of light around, so
// we want to take some of that into account too.
half3 UnityLightmappingAlbedo (half3 diffuse, half3 specular, half smoothness)
{
half roughness = SmoothnessToRoughness(smoothness);
half3 res = diffuse;
res += specular * roughness * 0.5;
return res;
}
float4 frag_meta (v2f_meta i) : SV_Target
{
// we're interested in diffuse & specular colors,
// and surface roughness to produce final albedo.
FragmentCommonData data = UNITY_SETUP_BRDF_INPUT (i.uv, float4(0, 0, 0, 0), float3(0, 0, 0));
UnityMetaInput o;
UNITY_INITIALIZE_OUTPUT(UnityMetaInput, o);
#if defined(EDITOR_VISUALIZATION)
o.Albedo = data.diffColor;
#else
o.Albedo = UnityLightmappingAlbedo (data.diffColor, data.specColor, data.smoothness);
#endif
o.SpecularColor = data.specColor;
o.Emission = Emission(i.uv.xy);
return UnityMetaFragment(o);
}
#endif // UNITY_STANDARD_META_INCLUDED
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