// Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

Shader "NatureManufacture Shaders/Terrain/StandardAlbedoAddPass"
{
    Properties
    {
        [HideInInspector] _TerrainHolesTexture("Holes Map (RGB)", 2D) = "white" {}
    }
    SubShader
    {
        Tags
        {
            "Queue" = "Geometry-99"
            "IgnoreProjector"="True"
            "RenderType" = "Opaque"
        }

        CGPROGRAM
        #pragma surface surf NoLighting decal:add vertex:SplatmapVert finalcolor:SplatmapFinalColor finalgbuffer:SplatmapFinalGBuffer fullforwardshadows nometa
        #pragma instancing_options assumeuniformscaling nomatrices nolightprobe nolightmap forwardadd
        #pragma multi_compile_fog
        #pragma target 3.0

        #include "UnityPBSLighting.cginc"

        #pragma multi_compile_local_fragment __ _ALPHATEST_ON
        #pragma multi_compile_local __ _NORMALMAP

        #define TERRAIN_SPLAT_ADDPASS
        #define TERRAIN_STANDARD_SHADER
        #define TERRAIN_INSTANCED_PERPIXEL_NORMAL
        #define TERRAIN_SURFACE_OUTPUT SurfaceOutput
        #include "TerrainSplatmapCommon.cginc"

        half _Metallic0;
        half _Metallic1;
        half _Metallic2;
        half _Metallic3;

        half _Smoothness0;
        half _Smoothness1;
        half _Smoothness2;
        half _Smoothness3;

        void surf(Input IN, inout SurfaceOutput o)
        {
            half4 splat_control;
            half weight;
            fixed4 mixedDiffuse;
            half4 defaultSmoothness = half4(_Smoothness0, _Smoothness1, _Smoothness2, _Smoothness3);
            SplatmapMix(IN, defaultSmoothness, splat_control, weight, mixedDiffuse, o.Normal);


            o.Alpha = weight;
            o.Emission = mixedDiffuse.rgb;
        }


        fixed4 LightingNoLighting(SurfaceOutput s, fixed3 lightDir, fixed atten)
        {
            return fixed4(0, 0, 0, 0); //half4(s.Albedo, s.Alpha);
        }
        ENDCG
    }

}