// Made with Amplify Shader Editor
// Available at the Unity Asset Store - http://u3d.as/y3X 
Shader "M3DS/Particle"
{
	Properties
	{
		_Color("Color", Color) = (0,0,0,0)
		_Albedo("Albedo", 2D) = "white" {}
		_DepthFadeDistance("Depth Fade Distance", Range( 0 , 10)) = 2
		_TransmissionAmount("Transmission Amount", Range( 0 , 1)) = 0.5
		[HideInInspector] _texcoord( "", 2D ) = "white" {}
		[HideInInspector] __dirty( "", Int ) = 1
	}

	SubShader
	{
		Tags{ "RenderType" = "Transparent"  "Queue" = "Transparent+0" "IgnoreProjector" = "True" }
		Cull Back
		CGINCLUDE
		#include "UnityPBSLighting.cginc"
		#include "UnityCG.cginc"
		#include "Lighting.cginc"
		#pragma target 3.0
		struct Input
		{
			float2 uv_texcoord;
			float4 vertexColor : COLOR;
			float4 screenPos;
		};

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

		uniform sampler2D _Albedo;
		uniform float4 _Albedo_ST;
		uniform float4 _Color;
		uniform float _TransmissionAmount;
		UNITY_DECLARE_DEPTH_TEXTURE( _CameraDepthTexture );
		uniform float4 _CameraDepthTexture_TexelSize;
		uniform float _DepthFadeDistance;

		inline half4 LightingStandardCustom(SurfaceOutputStandardCustom s, half3 viewDir, UnityGI gi )
		{
			half3 transmission = max(0 , -dot(s.Normal, gi.light.dir)) * gi.light.color * s.Transmission;
			half4 d = half4(s.Albedo * transmission , 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) + d;
		}

		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 )
		{
			float2 uv_Albedo = i.uv_texcoord * _Albedo_ST.xy + _Albedo_ST.zw;
			float4 tex2DNode21 = tex2D( _Albedo, uv_Albedo );
			o.Albedo = ( tex2DNode21 * _Color * i.vertexColor ).rgb;
			float3 temp_cast_1 = (_TransmissionAmount).xxx;
			o.Transmission = temp_cast_1;
			float4 ase_screenPos = float4( i.screenPos.xyz , i.screenPos.w + 0.00000000001 );
			float4 ase_screenPosNorm = ase_screenPos / ase_screenPos.w;
			ase_screenPosNorm.z = ( UNITY_NEAR_CLIP_VALUE >= 0 ) ? ase_screenPosNorm.z : ase_screenPosNorm.z * 0.5 + 0.5;
			float screenDepth30 = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE( _CameraDepthTexture, ase_screenPosNorm.xy ));
			float distanceDepth30 = abs( ( screenDepth30 - LinearEyeDepth( ase_screenPosNorm.z ) ) / ( _DepthFadeDistance ) );
			float clampResult33 = clamp( distanceDepth30 , 0.0 , 1.0 );
			o.Alpha = ( ( tex2DNode21.a * _Color.a * i.vertexColor.a ) * clampResult33 );
		}

		ENDCG
		CGPROGRAM
		#pragma surface surf StandardCustom alpha:fade keepalpha fullforwardshadows exclude_path:deferred 

		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 screenPos : TEXCOORD3;
				half4 color : COLOR0;
				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 );
				o.customPack1.xy = customInputData.uv_texcoord;
				o.customPack1.xy = v.texcoord;
				o.worldPos = worldPos;
				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 = IN.worldPos;
				half3 worldViewDir = normalize( UnityWorldSpaceViewDir( worldPos ) );
				surfIN.screenPos = IN.screenPos;
				surfIN.vertexColor = IN.color;
				SurfaceOutputStandardCustom o;
				UNITY_INITIALIZE_OUTPUT( SurfaceOutputStandardCustom, 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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