Shader "Nature/Terrain/Specular" {
	Properties {
		_SpecColor ("Specular Color", Color) = (0.5, 0.5, 0.5, 1)
		_Shininess ("Shininess", Range (0.03, 1)) = 0.078125

		// set by terrain engine
		[HideInInspector] _Control ("Control (RGBA)", 2D) = "red" {}
		[HideInInspector] _Splat3 ("Layer 3 (A)", 2D) = "white" {}
		[HideInInspector] _Splat2 ("Layer 2 (B)", 2D) = "white" {}
		[HideInInspector] _Splat1 ("Layer 1 (G)", 2D) = "white" {}
		[HideInInspector] _Splat0 ("Layer 0 (R)", 2D) = "white" {}
		[HideInInspector] _Normal3 ("Normal 3 (A)", 2D) = "bump" {}
		[HideInInspector] _Normal2 ("Normal 2 (B)", 2D) = "bump" {}
		[HideInInspector] _Normal1 ("Normal 1 (G)", 2D) = "bump" {}
		[HideInInspector] _Normal0 ("Normal 0 (R)", 2D) = "bump" {}
		// used in fallback on old cards & base map
		[HideInInspector] _MainTex ("BaseMap (RGB)", 2D) = "white" {}
		[HideInInspector] _Color ("Main Color", Color) = (1,1,1,1)
	}

	SubShader {
		Tags {
			"Queue" = "Geometry-100"
			"RenderType" = "Opaque"
		}

		CGPROGRAM
		#pragma surface surf BlinnPhong vertex:SplatmapVert finalcolor:SplatmapFinalColor finalprepass:SplatmapFinalPrepass finalgbuffer:SplatmapFinalGBuffer
		#pragma multi_compile_fog
		#pragma multi_compile __ _TERRAIN_NORMAL_MAP
		#pragma target 3.0
		// needs more than 8 texcoords
		#pragma exclude_renderers gles

		#include "TerrainSplatmapCommon.cginc"

		half _Shininess;

		void surf(Input IN, inout SurfaceOutput o)
		{
			half4 splat_control;
			half weight;
			fixed4 mixedDiffuse;
			SplatmapMix(IN, splat_control, weight, mixedDiffuse, o.Normal);
			o.Albedo = mixedDiffuse.rgb;
			o.Alpha = weight;
			o.Gloss = mixedDiffuse.a;
			o.Specular = _Shininess;
		}
		ENDCG
	}

	Dependency "AddPassShader" = "Hidden/TerrainEngine/Splatmap/Specular-AddPass"
	Dependency "BaseMapShader" = "Hidden/TerrainEngine/Splatmap/Specular-Base"

	Fallback "Nature/Terrain/Diffuse"
}