[Unity3D] 战场电视屏幕抖动扭曲Shader

由于项目需要，弄了一个屏幕抖动Shader，直接看效果吧，UGUI Shader。

注意：使用的时候需要两张噪音贴图


Shader "Effect/SimpleHeadEffect"


{


Properties


{


[PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}


_Color ("Tint", Color) = (1,1,1,1)




_StencilComp ("Stencil Comparison", Float) = 8


_Stencil ("Stencil ID", Float) = 0


_StencilOp ("Stencil Operation", Float) = 0


_StencilWriteMask ("Stencil Write Mask", Float) = 255


_StencilReadMask ("Stencil Read Mask", Float) = 255




_ColorMask ("Color Mask", Float) = 15


_NoiseTex ("Alpha Texture", 2D) = "white" {}


_NoiseTex2 ("Alpha Texture", 2D) = "white" {}




_DistortionFreq ("distortionFreq", Float) = 5


_BKColor ("BKColor", Color) = (0.5,0.5,0.5,1)




_Scale ("Scale", Float) = 256


}




SubShader


{


Tags


{


"Queue"="Transparent"


"IgnoreProjector"="True"


"RenderType"="Transparent"


"PreviewType"="Plane"


"CanUseSpriteAtlas"="True"


}




Stencil


{


Ref [_Stencil]


Comp [_StencilComp]


Pass [_StencilOp]


ReadMask [_StencilReadMask]


WriteMask [_StencilWriteMask]


}




Cull Off


Lighting Off


ZWrite Off


ZTest [unity_GUIZTestMode]


Blend SrcAlpha OneMinusSrcAlpha


ColorMask [_ColorMask]




Pass


{


CGPROGRAM


#pragma vertex vert


#pragma fragment frag


#include "UnityCG.cginc"




struct appdata_t


{


float4 vertex : POSITION;


float4 color : COLOR;


float2 texcoord : TEXCOORD0;


};




struct v2f


{


float4 vertex : SV_POSITION;


fixed4 color : COLOR;


half2 texcoord0 : TEXCOORD0;


half2 texcoord1 : TEXCOORD1;


};




fixed4 _Color;




v2f vert(appdata_t IN)


{


v2f OUT;


OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);


OUT.texcoord0 = IN.texcoord;


OUT.texcoord1 = half2(IN.texcoord.x + _CosTime.y * 0.25, IN.texcoord.y + frac(_Time.y));


#ifdef UNITY_HALF_TEXEL_OFFSET


OUT.vertex.xy += (_ScreenParams.zw-1.0)*float2(-1,1);


#endif


OUT.color = IN.color * _Color;


return OUT;


}




sampler2D _MainTex;


sampler2D _NoiseTex;


sampler2D _NoiseTex2;


float _DistortionFreq;


float _DistortionRoll;


half4 _BKColor;




fixed4 frag(v2f IN) : SV_Target


{


half2 tex0 = IN.texcoord0;


half2 tex1 = IN.texcoord1;




half dis = frac(tex0.y * _DistortionFreq + 0.5 * _Time.y);


dis *= (1 - dis);


dis /= 1 + _CosTime.y * 200 * abs(tex0.y);


tex0.x += dis * (tex2D(_NoiseTex2, tex1).r - 0.5);




half4 color = tex2D(_MainTex, tex0);


float noise = tex2D(_NoiseTex, tex1 * 4).r - 0.2;




color.rgb = lerp(color.rgb, _BKColor, 1 - color.a) * noise * 3;


color.a = 1;




return color;




}


ENDCG


}


}


}