// Made with Amplify Shader Editor
// Available at the Unity Asset Store - http://u3d.as/y3X 
Shader "ASESampleShaders/Community/EnvironmentGradient"
{
	Properties
	{
		[HideInInspector] __dirty( "", Int ) = 1
		_Top_XZ("Top_XZ", Color) = (0.2569204,0.5525266,0.7279412,0)
		_Bot_Y("Bot_Y", Color) = (0.3877363,0.5955882,0.188311,0)
		_GradientHeight("GradientHeight", Range( 0 , 20)) = 6.4
		_Top_Y("Top_Y", Color) = (0.7259277,0.7647059,0.06185123,0)
		_Bot_XZ("Bot_XZ", Color) = (0.7058823,0.2024221,0.2024221,0)
		_EdgeColor("EdgeColor", Color) = (0.9411765,0.9197947,0.7474049,0)
		_NormalMap("NormalMap", 2D) = "bump" {}
		_EdgeMultiplier("EdgeMultiplier", Range( 0 , 5)) = 1
		_AO_Power("AO_Power", Range( 0 , 4)) = 1
		_R_AO_G_Edges("R_AO_G_Edges", 2D) = "white" {}
	}

	SubShader
	{
		Tags{ "RenderType" = "Opaque"  "Queue" = "Geometry+0" }
		Cull Back
		ZTest LEqual
		CGINCLUDE
		#include "UnityPBSLighting.cginc"
		#include "Lighting.cginc"
		#pragma target 3.0
		#ifdef UNITY_PASS_SHADOWCASTER
			#undef INTERNAL_DATA
			#undef WorldReflectionVector
			#undef WorldNormalVector
			#define INTERNAL_DATA half3 internalSurfaceTtoW0; half3 internalSurfaceTtoW1; half3 internalSurfaceTtoW2;
			#define WorldReflectionVector(data,normal) reflect (data.worldRefl, half3(dot(data.internalSurfaceTtoW0,normal), dot(data.internalSurfaceTtoW1,normal), dot(data.internalSurfaceTtoW2,normal)))
			#define WorldNormalVector(data,normal) fixed3(dot(data.internalSurfaceTtoW0,normal), dot(data.internalSurfaceTtoW1,normal), dot(data.internalSurfaceTtoW2,normal))
		#endif
		struct Input
		{
			float2 texcoord_0;
			float3 worldNormal;
			INTERNAL_DATA
			float3 worldPos;
		};

		uniform sampler2D _NormalMap;
		uniform float4 _EdgeColor;
		uniform float _EdgeMultiplier;
		uniform sampler2D _R_AO_G_Edges;
		uniform float _AO_Power;
		uniform float4 _Bot_XZ;
		uniform float4 _Bot_Y;
		uniform float4 _Top_XZ;
		uniform float4 _Top_Y;
		uniform float _GradientHeight;

		void vertexDataFunc( inout appdata_full v, out Input o )
		{
			UNITY_INITIALIZE_OUTPUT( Input, o );
			o.texcoord_0.xy = v.texcoord.xy * float2( 1,1 ) + float2( 0,0 );
		}

		void surf( Input i , inout SurfaceOutputStandard o )
		{
			o.Normal = UnpackNormal( tex2D( _NormalMap, i.texcoord_0 ) );
			float4 tex2DNode13 = tex2D( _R_AO_G_Edges, i.texcoord_0 );
			float3 ase_worldNormal = WorldNormalVector( i, float3( 0, 0, 1 ) );
			float componentMask23 = ( abs( ase_worldNormal ) * abs( ase_worldNormal ) ).y;
			float3 ase_worldPos = i.worldPos;
			float4 temp_cast_0 = (0.0).xxxx;
			float4 temp_cast_1 = (1.0).xxxx;
			o.Albedo = clamp( ( ( _EdgeColor * ( _EdgeMultiplier * tex2DNode13.g ) ) + ( pow( tex2DNode13.r , _AO_Power ) * lerp( lerp( _Bot_XZ , _Bot_Y , componentMask23 ) , lerp( _Top_XZ , _Top_Y , componentMask23 ) , clamp( ( ase_worldPos.y / _GradientHeight ) , 0.0 , 1.0 ) ) ) ) , temp_cast_0 , temp_cast_1 ).rgb;
			o.Alpha = 1;
		}

		ENDCG
		CGPROGRAM
		#pragma surface surf Standard keepalpha fullforwardshadows exclude_path:deferred vertex:vertexDataFunc 

		ENDCG
		Pass
		{
			Name "ShadowCaster"
			Tags{ "LightMode" = "ShadowCaster" }
			ZWrite On
			CGPROGRAM
			#pragma vertex vert
			#pragma fragment frag
			#pragma target 3.0
			#pragma multi_compile_shadowcaster
			#pragma multi_compile UNITY_PASS_SHADOWCASTER
			#pragma skip_variants FOG_LINEAR FOG_EXP FOG_EXP2
			# include "HLSLSupport.cginc"
			#if ( SHADER_API_D3D11 || SHADER_API_GLCORE || SHADER_API_GLES3 || SHADER_API_METAL || SHADER_API_VULKAN )
				#define CAN_SKIP_VPOS
			#endif
			#include "UnityCG.cginc"
			#include "Lighting.cginc"
			#include "UnityPBSLighting.cginc"
			sampler3D _DitherMaskLOD;
			struct v2f
			{
				V2F_SHADOW_CASTER;
				float3 worldPos : TEXCOORD6;
				float4 tSpace0 : TEXCOORD1;
				float4 tSpace1 : TEXCOORD2;
				float4 tSpace2 : TEXCOORD3;
				UNITY_VERTEX_INPUT_INSTANCE_ID
			};
			v2f vert( appdata_full v )
			{
				v2f o;
				UNITY_SETUP_INSTANCE_ID( v );
				UNITY_INITIALIZE_OUTPUT( v2f, o );
				UNITY_TRANSFER_INSTANCE_ID( v, o );
				Input customInputData;
				vertexDataFunc( v, customInputData );
				float3 worldPos = mul( unity_ObjectToWorld, v.vertex ).xyz;
				half3 worldNormal = UnityObjectToWorldNormal( v.normal );
				fixed3 worldTangent = UnityObjectToWorldDir( v.tangent.xyz );
				fixed tangentSign = v.tangent.w * unity_WorldTransformParams.w;
				fixed3 worldBinormal = cross( worldNormal, worldTangent ) * tangentSign;
				o.tSpace0 = float4( worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x );
				o.tSpace1 = float4( worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y );
				o.tSpace2 = float4( worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z );
				o.worldPos = worldPos;
				TRANSFER_SHADOW_CASTER_NORMALOFFSET( o )
				return o;
			}
			fixed4 frag( v2f IN
			#if !defined( CAN_SKIP_VPOS )
			, UNITY_VPOS_TYPE vpos : VPOS
			#endif
			) : SV_Target
			{
				UNITY_SETUP_INSTANCE_ID( IN );
				Input surfIN;
				UNITY_INITIALIZE_OUTPUT( Input, surfIN );
				float3 worldPos = float3( IN.tSpace0.w, IN.tSpace1.w, IN.tSpace2.w );
				fixed3 worldViewDir = normalize( UnityWorldSpaceViewDir( worldPos ) );
				surfIN.worldPos = worldPos;
				surfIN.worldNormal = float3( IN.tSpace0.z, IN.tSpace1.z, IN.tSpace2.z );
				surfIN.internalSurfaceTtoW0 = IN.tSpace0.xyz;
				surfIN.internalSurfaceTtoW1 = IN.tSpace1.xyz;
				surfIN.internalSurfaceTtoW2 = IN.tSpace2.xyz;
				SurfaceOutputStandard o;
				UNITY_INITIALIZE_OUTPUT( SurfaceOutputStandard, o )
				surf( surfIN, o );
				#if defined( CAN_SKIP_VPOS )
				float2 vpos = IN.pos;
				#endif
				SHADOW_CASTER_FRAGMENT( IN )
			}
			ENDCG
		}
	}
	Fallback "Diffuse"
	CustomEditor "ASEMaterialInspector"
}
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