// Made with Amplify Shader Editor v1.9.2
// Available at the Unity Asset Store - http://u3d.as/y3X 
Shader "Polyart/Dreamscape Foliage"
{
	Properties
	{
		_AlphaCutoff("Alpha Cutoff", Range( 0 , 1)) = 0.35
		_FoliageTexture("Foliage Texture", 2D) = "white" {}
		_ColorTop("Color Top", Color) = (0,0,0,0)
		_ColorBottom("Color Bottom", Color) = (0,0,0,0)
		_ColorBottomLevel("Color Bottom Level", Float) = 0
		_ColorBottomMaskFade("Color Bottom Mask Fade", Range( -1 , 0)) = 0
		_Smoothness("Smoothness", Range( 0 , 1)) = 0
		[Header(WIND)]_WindSpeed("Wind Speed", Range( 0 , 1)) = 0.5
		_WindScale("Wind Scale", Range( 0 , 2)) = 0.2588236
		_WindIntensity("Wind Intensity", Range( 0 , 50)) = 5
		[Header(Translucency)]
		_Translucency("Strength", Range( 0 , 50)) = 1
		_TransNormalDistortion("Normal Distortion", Range( 0 , 1)) = 0.1
		_TransScattering("Scaterring Falloff", Range( 1 , 50)) = 2
		_TransDirect("Direct", Range( 0 , 1)) = 1
		_TransAmbient("Ambient", Range( 0 , 1)) = 0.2
		_TransShadow("Shadow", Range( 0 , 1)) = 0.9
		[HideInInspector] _texcoord( "", 2D ) = "white" {}
		[HideInInspector] __dirty( "", Int ) = 1
	}

	SubShader
	{
		Tags{ "RenderType" = "TransparentCutout"  "Queue" = "AlphaTest+0" }
		Cull Off
		CGPROGRAM
		#include "UnityShaderVariables.cginc"
		#include "UnityPBSLighting.cginc"
		#pragma target 3.0
		#pragma surface surf StandardCustom keepalpha addshadow fullforwardshadows exclude_path:deferred vertex:vertexDataFunc 
		struct Input
		{
			float3 worldPos;
			float2 uv_texcoord;
		};

		struct SurfaceOutputStandardCustom
		{
			half3 Albedo;
			half3 Normal;
			half3 Emission;
			half Metallic;
			half Smoothness;
			half Occlusion;
			half Alpha;
			half3 Translucency;
		};

		uniform float _WindSpeed;
		uniform float _WindScale;
		uniform float _WindIntensity;
		uniform float4 _ColorTop;
		uniform float4 _ColorBottom;
		uniform float _ColorBottomLevel;
		uniform float _ColorBottomMaskFade;
		uniform sampler2D _FoliageTexture;
		uniform float4 _FoliageTexture_ST;
		uniform float _Smoothness;
		uniform half _Translucency;
		uniform half _TransNormalDistortion;
		uniform half _TransScattering;
		uniform half _TransDirect;
		uniform half _TransAmbient;
		uniform half _TransShadow;
		uniform float _AlphaCutoff;


		float3 mod3D289( float3 x ) { return x - floor( x / 289.0 ) * 289.0; }

		float4 mod3D289( float4 x ) { return x - floor( x / 289.0 ) * 289.0; }

		float4 permute( float4 x ) { return mod3D289( ( x * 34.0 + 1.0 ) * x ); }

		float4 taylorInvSqrt( float4 r ) { return 1.79284291400159 - r * 0.85373472095314; }

		float snoise( float3 v )
		{
			const float2 C = float2( 1.0 / 6.0, 1.0 / 3.0 );
			float3 i = floor( v + dot( v, C.yyy ) );
			float3 x0 = v - i + dot( i, C.xxx );
			float3 g = step( x0.yzx, x0.xyz );
			float3 l = 1.0 - g;
			float3 i1 = min( g.xyz, l.zxy );
			float3 i2 = max( g.xyz, l.zxy );
			float3 x1 = x0 - i1 + C.xxx;
			float3 x2 = x0 - i2 + C.yyy;
			float3 x3 = x0 - 0.5;
			i = mod3D289( i);
			float4 p = permute( permute( permute( i.z + float4( 0.0, i1.z, i2.z, 1.0 ) ) + i.y + float4( 0.0, i1.y, i2.y, 1.0 ) ) + i.x + float4( 0.0, i1.x, i2.x, 1.0 ) );
			float4 j = p - 49.0 * floor( p / 49.0 );  // mod(p,7*7)
			float4 x_ = floor( j / 7.0 );
			float4 y_ = floor( j - 7.0 * x_ );  // mod(j,N)
			float4 x = ( x_ * 2.0 + 0.5 ) / 7.0 - 1.0;
			float4 y = ( y_ * 2.0 + 0.5 ) / 7.0 - 1.0;
			float4 h = 1.0 - abs( x ) - abs( y );
			float4 b0 = float4( x.xy, y.xy );
			float4 b1 = float4( x.zw, y.zw );
			float4 s0 = floor( b0 ) * 2.0 + 1.0;
			float4 s1 = floor( b1 ) * 2.0 + 1.0;
			float4 sh = -step( h, 0.0 );
			float4 a0 = b0.xzyw + s0.xzyw * sh.xxyy;
			float4 a1 = b1.xzyw + s1.xzyw * sh.zzww;
			float3 g0 = float3( a0.xy, h.x );
			float3 g1 = float3( a0.zw, h.y );
			float3 g2 = float3( a1.xy, h.z );
			float3 g3 = float3( a1.zw, h.w );
			float4 norm = taylorInvSqrt( float4( dot( g0, g0 ), dot( g1, g1 ), dot( g2, g2 ), dot( g3, g3 ) ) );
			g0 *= norm.x;
			g1 *= norm.y;
			g2 *= norm.z;
			g3 *= norm.w;
			float4 m = max( 0.6 - float4( dot( x0, x0 ), dot( x1, x1 ), dot( x2, x2 ), dot( x3, x3 ) ), 0.0 );
			m = m* m;
			m = m* m;
			float4 px = float4( dot( x0, g0 ), dot( x1, g1 ), dot( x2, g2 ), dot( x3, g3 ) );
			return 42.0 * dot( m, px);
		}


		void vertexDataFunc( inout appdata_full v, out Input o )
		{
			UNITY_INITIALIZE_OUTPUT( Input, o );
			float3 ase_worldPos = mul( unity_ObjectToWorld, v.vertex );
			float mulTime45 = _Time.y * ( _WindSpeed * 3 );
			float simplePerlin3D47 = snoise( ( ase_worldPos + mulTime45 )*_WindScale );
			float vWind54 = ( ( simplePerlin3D47 * 0.015 ) * _WindIntensity );
			float3 temp_cast_0 = (vWind54).xxx;
			v.vertex.xyz += temp_cast_0;
			v.vertex.w = 1;
		}

		inline half4 LightingStandardCustom(SurfaceOutputStandardCustom s, half3 viewDir, UnityGI gi )
		{
			#if !defined(DIRECTIONAL)
			float3 lightAtten = gi.light.color;
			#else
			float3 lightAtten = lerp( _LightColor0.rgb, gi.light.color, _TransShadow );
			#endif
			half3 lightDir = gi.light.dir + s.Normal * _TransNormalDistortion;
			half transVdotL = pow( saturate( dot( viewDir, -lightDir ) ), _TransScattering );
			half3 translucency = lightAtten * (transVdotL * _TransDirect + gi.indirect.diffuse * _TransAmbient) * s.Translucency;
			half4 c = half4( s.Albedo * translucency * _Translucency, 0 );

			SurfaceOutputStandard r;
			r.Albedo = s.Albedo;
			r.Normal = s.Normal;
			r.Emission = s.Emission;
			r.Metallic = s.Metallic;
			r.Smoothness = s.Smoothness;
			r.Occlusion = s.Occlusion;
			r.Alpha = s.Alpha;
			return LightingStandard (r, viewDir, gi) + c;
		}

		inline void LightingStandardCustom_GI(SurfaceOutputStandardCustom s, UnityGIInput data, inout UnityGI gi )
		{
			#if defined(UNITY_PASS_DEFERRED) && UNITY_ENABLE_REFLECTION_BUFFERS
				gi = UnityGlobalIllumination(data, s.Occlusion, s.Normal);
			#else
				UNITY_GLOSSY_ENV_FROM_SURFACE( g, s, data );
				gi = UnityGlobalIllumination( data, s.Occlusion, s.Normal, g );
			#endif
		}

		void surf( Input i , inout SurfaceOutputStandardCustom o )
		{
			float3 ase_vertex3Pos = mul( unity_WorldToObject, float4( i.worldPos , 1 ) );
			float4 lerpResult7 = lerp( _ColorTop , _ColorBottom , saturate( ( ( ase_vertex3Pos.y + _ColorBottomLevel ) * ( _ColorBottomMaskFade * 2 ) ) ));
			float2 uv_FoliageTexture = i.uv_texcoord * _FoliageTexture_ST.xy + _FoliageTexture_ST.zw;
			float4 tex2DNode10 = tex2D( _FoliageTexture, uv_FoliageTexture );
			o.Albedo = ( lerpResult7 * tex2DNode10 ).rgb;
			o.Smoothness = _Smoothness;
			float3 temp_cast_1 = (1.0).xxx;
			o.Translucency = temp_cast_1;
			o.Alpha = 1;
			clip( tex2DNode10.a - _AlphaCutoff );
		}

		ENDCG
	}
	Fallback "Diffuse"
}
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