shaoxiadiablo/Assets/AGame/Res/Shaders/MY/MYWater.shader

Shader "MY/Water" {
	Properties{
		[HDR]_Color("Main Color", COLOR) = (.34, .85, .92, 1)
		_WaveScale("Wave scale", Range(0.02,0.15)) = 0.063
		_ReflDistort("Reflection distort", Range(0,1.5)) = 0.44
		_RefrDistort("Refraction distort", Range(0,1.5)) = 0.40
		_RefrColor("Refraction color", COLOR) = (.34, .85, .92, 1)
		[NoScaleOffset] _Fresnel("Fresnel (A) ", 2D) = "gray" {}
		[NoScaleOffset] _BumpMap("Normalmap ", 2D) = "bump" {}
		WaveSpeed("Wave speed (map1 x,y; map2 x,y)", Vector) = (19,9,-16,-7)
		[NoScaleOffset] _ReflectiveColor("Reflective color (RGB) fresnel (A) ", 2D) = "" {}
		_HorizonColor("Simple water horizon color", COLOR) = (.172, .463, .435, 1)
		[HideInInspector] _ReflectionTex("Internal Reflection", 2D) = "" {}
		[HideInInspector] _RefractionTex("Internal Refraction", 2D) = "" {}
	}


		// -----------------------------------------------------------
		// Fragment program cards


		Subshader{
		//Tags { "WaterMode" = "Refractive" "RenderType" = "Transparent" }
		Tags { "WaterMode" = "Refractive" "Queue" = "Transparent" "IgnoreProjector" = "True" "RenderType" = "Transparent" "PreviewType" = "Plane" }
		Blend SrcAlpha OneMinusSrcAlpha
		ZWrite Off
		//ColorMask RGB
		//Cull Off Lighting Off ZWrite Off

		Pass {
	CGPROGRAM
	#pragma vertex vert
	#pragma fragment frag
	#pragma multi_compile_fog
	#pragma multi_compile WATER_REFRACTIVE WATER_REFLECTIVE WATER_SIMPLE

	#if defined (WATER_REFLECTIVE) || defined (WATER_REFRACTIVE)
	#define HAS_REFLECTION 1
	#endif
	#if defined (WATER_REFRACTIVE)
	#define HAS_REFRACTION 1
	#endif


	#include "UnityCG.cginc"

	uniform float4 _WaveScale4;
	uniform float4 _WaveOffset;

	uniform fixed4 _Color;

	#if HAS_REFLECTION
	uniform float _ReflDistort;
	#endif
	#if HAS_REFRACTION
	uniform float _RefrDistort;
	#endif

	struct appdata {
		float4 vertex : POSITION;
		float3 normal : NORMAL;
	};

	struct v2f {
		float4 pos : SV_POSITION;
		#if defined(HAS_REFLECTION) || defined(HAS_REFRACTION)
			float4 ref : TEXCOORD0;
			float2 bumpuv0 : TEXCOORD1;
			float2 bumpuv1 : TEXCOORD2;
			float3 viewDir : TEXCOORD3;
		#else
			float2 bumpuv0 : TEXCOORD0;
			float2 bumpuv1 : TEXCOORD1;
			float3 viewDir : TEXCOORD2;
		#endif
		UNITY_FOG_COORDS(4)
	};

	v2f vert(appdata v)
	{
		v2f o;
		o.pos = UnityObjectToClipPos(v.vertex);


		// scroll bump waves
		float4 temp;
		float4 wpos = mul(unity_ObjectToWorld, v.vertex);
		temp.xyzw = wpos.xzxz * _WaveScale4 + _WaveOffset;
		o.bumpuv0 = temp.xy;
		o.bumpuv1 = temp.wz;

		// object space view direction (will normalize per pixel)
		o.viewDir.xzy = WorldSpaceViewDir(v.vertex);

		#if defined(HAS_REFLECTION) || defined(HAS_REFRACTION)
		o.ref = ComputeNonStereoScreenPos(o.pos);
		#endif

		UNITY_TRANSFER_FOG(o,o.pos);
		return o;
	}

	#if defined (WATER_REFLECTIVE) || defined (WATER_REFRACTIVE)
	sampler2D _ReflectionTex;
	#endif
	#if defined (WATER_REFLECTIVE) || defined (WATER_SIMPLE)
	sampler2D _ReflectiveColor;
	#endif
	#if defined (WATER_REFRACTIVE)
	sampler2D _Fresnel;
	sampler2D _RefractionTex;
	uniform float4 _RefrColor;
	#endif
	#if defined (WATER_SIMPLE)
	uniform float4 _HorizonColor;
	#endif
	sampler2D _BumpMap;

	half4 frag(v2f i) : SV_Target
	{
		i.viewDir = normalize(i.viewDir);

	// combine two scrolling bumpmaps into one
	half3 bump1 = UnpackNormal(tex2D(_BumpMap, i.bumpuv0)).rgb;
	half3 bump2 = UnpackNormal(tex2D(_BumpMap, i.bumpuv1)).rgb;
	half3 bump = (bump1 + bump2) * 0.5;

	// fresnel factor
	half fresnelFac = dot(i.viewDir, bump);

	// perturb reflection/refraction UVs by bumpmap, and lookup colors

	#if HAS_REFLECTION
	float4 uv1 = i.ref; uv1.xy += bump * _ReflDistort;
	half4 refl = tex2Dproj(_ReflectionTex, UNITY_PROJ_COORD(uv1));
	#endif
	#if HAS_REFRACTION
	float4 uv2 = i.ref; uv2.xy -= bump * _RefrDistort;
	half4 refr = tex2Dproj(_RefractionTex, UNITY_PROJ_COORD(uv2)) * _RefrColor;
	#endif

	// final color is between refracted and reflected based on fresnel
	half4 color;

	#if defined(WATER_REFRACTIVE)
	half fresnel = UNITY_SAMPLE_1CHANNEL(_Fresnel, float2(fresnelFac,fresnelFac));
	color = lerp(refr, refl, fresnel);
	#endif

	#if defined(WATER_REFLECTIVE)
	half4 water = tex2D(_ReflectiveColor, float2(fresnelFac,fresnelFac));
	color.rgb = lerp(water.rgb, refl.rgb, water.a);
	color.a = refl.a * water.a;
	#endif

	#if defined(WATER_SIMPLE)
	half4 water = tex2D(_ReflectiveColor, float2(fresnelFac,fresnelFac));
	color.rgb = lerp(water.rgb, _HorizonColor.rgb, water.a);
	color.a = _HorizonColor.a;
	#endif

	UNITY_APPLY_FOG(i.fogCoord, color);
	color.rgb *= _Color.rgb;
	color.a = _Color.a;
	return color;
}
ENDCG

	}
	}

}