// Made with Amplify Shader Editor
// Available at the Unity Asset Store - http://u3d.as/y3X 
Shader "UV/water"
{
	Properties
	{
		[HDR]_Color0("发光色", Color) = (0,0.8235294,1.403922,0)
		_Color1("基础色", Color) = (0,0.297723,0.5188679,0)
		_Float0("水流发光强度", Range( 0 , 1)) = 0.5
		_Float2("水流透明度", Range( 0 , 1)) = 0.5
		_Float1("水流速度", Range( 0 , 1)) = 0.3
		_TextureSample0("Texture Sample 0", 2D) = "bump" {}
		[HideInInspector] _texcoord( "", 2D ) = "white" {}
		[HideInInspector] __dirty( "", Int ) = 1
	}

	SubShader
	{
		Tags{ "RenderType" = "Transparent"  "Queue" = "Transparent+0" "IgnoreProjector" = "True" "IsEmissive" = "true"  }
		Cull Back
		CGINCLUDE
		#include "UnityShaderVariables.cginc"
		#include "UnityPBSLighting.cginc"
		#include "Lighting.cginc"
		#pragma target 3.0
		struct Input
		{
			float2 uv_texcoord;
		};

		uniform sampler2D _TextureSample0;
		uniform float _Float1;
		uniform float4 _Color0;
		uniform float4 _Color1;
		uniform float _Float0;
		uniform float _Float2;


		//https://www.shadertoy.com/view/XdXGW8
		float2 GradientNoiseDir( float2 x )
		{
			const float2 k = float2( 0.3183099, 0.3678794 );
			x = x * k + k.yx;
			return -1.0 + 2.0 * frac( 16.0 * k * frac( x.x * x.y * ( x.x + x.y ) ) );
		}
		
		float GradientNoise( float2 UV, float Scale )
		{
			float2 p = UV * Scale;
			float2 i = floor( p );
			float2 f = frac( p );
			float2 u = f * f * ( 3.0 - 2.0 * f );
			return lerp( lerp( dot( GradientNoiseDir( i + float2( 0.0, 0.0 ) ), f - float2( 0.0, 0.0 ) ),
					dot( GradientNoiseDir( i + float2( 1.0, 0.0 ) ), f - float2( 1.0, 0.0 ) ), u.x ),
					lerp( dot( GradientNoiseDir( i + float2( 0.0, 1.0 ) ), f - float2( 0.0, 1.0 ) ),
					dot( GradientNoiseDir( i + float2( 1.0, 1.0 ) ), f - float2( 1.0, 1.0 ) ), u.x ), u.y );
		}


		void surf( Input i , inout SurfaceOutputStandard o )
		{
			float mulTime9 = _Time.y * _Float1;
			float2 appendResult10 = (float2(mulTime9 , 0.0));
			float2 uv_TexCoord18 = i.uv_texcoord * float2( 0.1,0.4 ) + appendResult10;
			o.Normal = UnpackNormal( tex2D( _TextureSample0, uv_TexCoord18 ) );
			float2 uv_TexCoord8 = i.uv_texcoord * float2( 0.2,1 ) + appendResult10;
			float gradientNoise11 = GradientNoise(uv_TexCoord8,10.0);
			gradientNoise11 = gradientNoise11*0.5 + 0.5;
			float4 lerpResult3 = lerp( _Color0 , _Color1 , gradientNoise11);
			o.Albedo = lerpResult3.rgb;
			o.Emission = ( lerpResult3 * _Float0 ).rgb;
			o.Alpha = _Float2;
		}

		ENDCG
		CGPROGRAM
		#pragma surface surf Standard alpha:fade keepalpha fullforwardshadows 

		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_GLES || 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;
				float2 customPack1 : TEXCOORD1;
				float3 worldPos : TEXCOORD2;
				float4 tSpace0 : TEXCOORD3;
				float4 tSpace1 : TEXCOORD4;
				float4 tSpace2 : TEXCOORD5;
				UNITY_VERTEX_INPUT_INSTANCE_ID
				UNITY_VERTEX_OUTPUT_STEREO
			};
			v2f vert( appdata_full v )
			{
				v2f o;
				UNITY_SETUP_INSTANCE_ID( v );
				UNITY_INITIALIZE_OUTPUT( v2f, o );
				UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO( o );
				UNITY_TRANSFER_INSTANCE_ID( v, o );
				Input customInputData;
				float3 worldPos = mul( unity_ObjectToWorld, v.vertex ).xyz;
				half3 worldNormal = UnityObjectToWorldNormal( v.normal );
				half3 worldTangent = UnityObjectToWorldDir( v.tangent.xyz );
				half tangentSign = v.tangent.w * unity_WorldTransformParams.w;
				half3 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.customPack1.xy = customInputData.uv_texcoord;
				o.customPack1.xy = v.texcoord;
				o.worldPos = worldPos;
				TRANSFER_SHADOW_CASTER_NORMALOFFSET( o )
				return o;
			}
			half4 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 );
				surfIN.uv_texcoord = IN.customPack1.xy;
				float3 worldPos = IN.worldPos;
				half3 worldViewDir = normalize( UnityWorldSpaceViewDir( worldPos ) );
				SurfaceOutputStandard o;
				UNITY_INITIALIZE_OUTPUT( SurfaceOutputStandard, o )
				surf( surfIN, o );
				#if defined( CAN_SKIP_VPOS )
				float2 vpos = IN.pos;
				#endif
				half alphaRef = tex3D( _DitherMaskLOD, float3( vpos.xy * 0.25, o.Alpha * 0.9375 ) ).a;
				clip( alphaRef - 0.01 );
				SHADOW_CASTER_FRAGMENT( IN )
			}
			ENDCG
		}
	}
	Fallback "Diffuse"
	CustomEditor "ASEMaterialInspector"
}
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//CHKSM=37BD2E833AA60D19691E42342ADC76507F04CADC