Shader "NatureManufacture Shaders/Water/Water Particles"
{
	Properties
	{
		_Color("Color", Color) = (1,1,1,0)
		_ColorPower("Color Power", Vector) = (3,3,3,0)
		_AOPower("AO Power", Range( 0 , 1)) = 1
		_Opacity("Opacity", Range( 0 , 20)) = 0.5
		_ParticleTexture("Particle Texture", 2D) = "white" {}
		_NormalMap("Normal Map", 2D) = "bump" {}
		_NormalScale("Normal Scale", Range( 0 , 1)) = 0
		_Specular("Specular", Range( 0 , 1)) = 0.7
		_Smoothness("Smoothness", Range( 0 , 1)) = 0.7
		[HideInInspector] _texcoord( "", 2D ) = "white" {}
		[HideInInspector] __dirty( "", Int ) = 1
	}

	SubShader
	{
		Tags{ "RenderType" = "Transparent"  "Queue" = "Transparent+0" "IgnoreProjector" = "True" "IsEmissive" = "true"  }
		Cull Off
		GrabPass{ }
		CGINCLUDE
		#include "UnityStandardUtils.cginc"
		#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) half3(dot(data.internalSurfaceTtoW0,normal), dot(data.internalSurfaceTtoW1,normal), dot(data.internalSurfaceTtoW2,normal))
		#endif
		struct Input
		{
			float4 vertexColor : COLOR;
			float2 uv_texcoord;
			float3 worldNormal;
			INTERNAL_DATA
			float3 worldPos;
			float4 screenPos;
		};

		uniform float3 _ColorPower;
		uniform float4 _Color;
		uniform sampler2D _ParticleTexture;
		uniform float4 _ParticleTexture_ST;
		uniform float _NormalScale;
		uniform sampler2D _NormalMap;
		uniform float4 _NormalMap_ST;
		uniform sampler2D _GrabTexture;
		uniform float _Specular;
		uniform float _Smoothness;
		uniform float _AOPower;
		uniform float _Opacity;


		inline float4 ASE_ComputeGrabScreenPos( float4 pos )
		{
			#if UNITY_UV_STARTS_AT_TOP
			float scale = -1.0;
			#else
			float scale = 1.0;
			#endif
			float4 o = pos;
			o.y = pos.w * 0.5f;
			o.y = ( pos.y - o.y ) * _ProjectionParams.x * scale + o.y;
			return o;
		}


		void surf( Input i , inout SurfaceOutputStandardSpecular o )
		{
			o.Normal = float3(0,0,1);
			float2 uv_ParticleTexture = i.uv_texcoord * _ParticleTexture_ST.xy + _ParticleTexture_ST.zw;
			float4 tex2DNode34 = tex2D( _ParticleTexture, uv_ParticleTexture );
			o.Albedo = ( ( ( float4( _ColorPower , 0.0 ) * i.vertexColor ) * _Color ) * tex2DNode34 ).rgb;
			float2 uv_NormalMap = i.uv_texcoord * _NormalMap_ST.xy + _NormalMap_ST.zw;
			float3 tex2DNode10 = UnpackScaleNormal( tex2D( _NormalMap, uv_NormalMap ), _NormalScale );
			float3 ase_worldPos = i.worldPos;
			float3 ase_worldViewDir = normalize( UnityWorldSpaceViewDir( ase_worldPos ) );
			float dotResult25 = dot( (WorldNormalVector( i , tex2DNode10 )) , ase_worldViewDir );
			float4 ase_screenPos = float4( i.screenPos.xyz , i.screenPos.w + 0.00000000001 );
			float4 ase_grabScreenPos = ASE_ComputeGrabScreenPos( ase_screenPos );
			float4 ase_grabScreenPosNorm = ase_grabScreenPos / ase_grabScreenPos.w;
			float4 screenColor8 = tex2Dproj( _GrabTexture, UNITY_PROJ_COORD( ( ase_grabScreenPosNorm + float4( tex2DNode10 , 0.0 ) ) ) );
			o.Emission = ( ( 1.0 - ( dotResult25 * 0.8 ) ) * screenColor8 ).rgb;
			float3 temp_cast_4 = (_Specular).xxx;
			o.Specular = temp_cast_4;
			o.Smoothness = _Smoothness;
			o.Occlusion = _AOPower;
			float clampResult40 = clamp( ( _Opacity * tex2DNode34.r ) , 0.0 , 1.0 );
			o.Alpha = ( clampResult40 * i.vertexColor.a );
		}

		ENDCG
		CGPROGRAM
		#pragma surface surf StandardSpecular 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;
				float4 screenPos : TEXCOORD2;
				float4 tSpace0 : TEXCOORD3;
				float4 tSpace1 : TEXCOORD4;
				float4 tSpace2 : TEXCOORD5;
				half4 color : COLOR0;
				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;
				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;
				TRANSFER_SHADOW_CASTER_NORMALOFFSET( o )
				o.screenPos = ComputeScreenPos( o.pos );
				o.color = v.color;
				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 = float3( IN.tSpace0.w, IN.tSpace1.w, IN.tSpace2.w );
				half3 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;
				surfIN.screenPos = IN.screenPos;
				surfIN.vertexColor = IN.color;
				SurfaceOutputStandardSpecular o;
				UNITY_INITIALIZE_OUTPUT( SurfaceOutputStandardSpecular, 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"
}