Unlit Water.shader

// Made with Amplify Shader Editor
// Available at the Unity Asset Store - http://u3d.as/y3X 
Shader "Custom/Water"
{
	Properties
	{
		_Color("Color", Color) = (0.6196079,0.9176471,1,0)
		_UnderwaterColor("Underwater Color", Color) = (0.3529412,0.7176471,0.8207547,0)
		_Foamcolor("Foam color", Color) = (1,1,1,1)
		_EdgeLength ( "Edge length", Range( 2, 50 ) ) = 15
		_Foam("Foam", Range( 0 , 1)) = 0.1
		_Depth("Depth", Range( 0 , 2)) = 0.75
		_Wavespeed("Wave speed", Range( 0 , 0.25)) = 0.1
		_Waves("Waves", Range( 0 , 2)) = 0.5
		[HideInInspector] __dirty( "", Int ) = 1
	}

	SubShader
	{
		Tags{ "RenderType" = "Opaque"  "Queue" = "Overlay+0" "IsEmissive" = "true"  }
		Cull Back
		CGPROGRAM
		#include "UnityShaderVariables.cginc"
		#include "UnityCG.cginc"
		#include "Tessellation.cginc"
		#pragma target 4.6
		#pragma surface surf Unlit keepalpha addshadow fullforwardshadows vertex:vertexDataFunc tessellate:tessFunction 
		struct Input
		{
			float4 screenPos;
		};

		uniform float _Wavespeed;
		uniform float _Waves;
		uniform float4 _UnderwaterColor;
		uniform float4 _Color;
		UNITY_DECLARE_DEPTH_TEXTURE( _CameraDepthTexture );
		uniform float4 _CameraDepthTexture_TexelSize;
		uniform float _Depth;
		uniform float4 _Foamcolor;
		uniform float _Foam;
		uniform float _EdgeLength;


		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);
		}


		float4 tessFunction( appdata_full v0, appdata_full v1, appdata_full v2 )
		{
			return UnityEdgeLengthBasedTess (v0.vertex, v1.vertex, v2.vertex, _EdgeLength);
		}

		void vertexDataFunc( inout appdata_full v )
		{
			float mulTime64 = _Time.y * _Wavespeed;
			float2 temp_cast_0 = (mulTime64).xx;
			float2 uv_TexCoord55 = v.texcoord.xy + temp_cast_0;
			float simplePerlin3D54 = snoise( float3( uv_TexCoord55 ,  0.0 )*10.0 );
			float mulTime67 = _Time.y * ( _Wavespeed * -1.0 );
			float2 temp_cast_2 = (mulTime67).xx;
			float2 uv_TexCoord68 = v.texcoord.xy + temp_cast_2;
			float simplePerlin3D66 = snoise( float3( uv_TexCoord68 ,  0.0 )*5.0 );
			float3 temp_cast_4 = (( ( ( simplePerlin3D54 - simplePerlin3D66 ) / 20.0 ) * _Waves )).xxx;
			v.vertex.xyz += temp_cast_4;
		}

		inline half4 LightingUnlit( SurfaceOutput s, half3 lightDir, half atten )
		{
			return half4 ( 0, 0, 0, s.Alpha );
		}

		void surf( Input i , inout SurfaceOutput o )
		{
			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 screenDepth7 = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE( _CameraDepthTexture, ase_screenPosNorm.xy ));
			float distanceDepth7 = saturate( ( screenDepth7 - LinearEyeDepth( ase_screenPosNorm.z ) ) / ( _Depth ) );
			float4 lerpResult12 = lerp( _UnderwaterColor , _Color , distanceDepth7);
			float screenDepth13 = LinearEyeDepth(SAMPLE_DEPTH_TEXTURE( _CameraDepthTexture, ase_screenPosNorm.xy ));
			float distanceDepth13 = ( screenDepth13 - LinearEyeDepth( ase_screenPosNorm.z ) ) / ( _Foam );
			float clampResult18 = clamp( pow( distanceDepth13 , 20.0 ) , 0.0 , 1.0 );
			o.Emission = ( lerpResult12 + ( _Foamcolor * ( 1.0 - clampResult18 ) ) ).rgb;
			o.Alpha = 1;
		}

		ENDCG
	}
	Fallback "Diffuse"
	CustomEditor "ASEMaterialInspector"
}
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