ugui毛玻璃效果shader

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Custom/WaterBlur" {

Properties {

    _blurSizeXY("BlurSizeXY", Range(0,10)) = 2

}

    SubShader {

        // Draw ourselves after all opaque geometry

        Tags { "Queue" = "Transparent" }

        // Grab the screen behind the object into _GrabTexture

        GrabPass { }

        // Render the object with the texture generated above

        Pass {

CGPROGRAM

#pragma debug

#pragma vertex vert

#pragma fragment frag

#pragma target 3.0

            sampler2D _GrabTexture : register(s0);

            float _blurSizeXY;

struct data {

    float4 vertex : POSITION;

    float3 normal : NORMAL;

};

struct v2f {

    float4 position : POSITION;

    float4 screenPos : TEXCOORD0;

};

v2f vert(data i){

    v2f o;

    o.position = UnityObjectToClipPos(i.vertex);

    o.screenPos = o.position;

    return o;

}

half4 frag( v2f i ) : COLOR

{

    float2 screenPos = i.screenPos.xy / i.screenPos.w;

    float depth= _blurSizeXY*0.0005;

    screenPos.x = (screenPos.x + 1) * 0.5;

    screenPos.y = 1-(screenPos.y + 1) * 0.5;

    half4 sum = half4(0.0h,0.0h,0.0h,0.0h); 

    sum += tex2D( _GrabTexture, float2(screenPos.x-5.0 * depth, screenPos.y+5.0 * depth)) * 0.025;   

    sum += tex2D( _GrabTexture, float2(screenPos.x+5.0 * depth, screenPos.y-5.0 * depth)) * 0.025;

    sum += tex2D( _GrabTexture, float2(screenPos.x-4.0 * depth, screenPos.y+4.0 * depth)) * 0.05;

    sum += tex2D( _GrabTexture, float2(screenPos.x+4.0 * depth, screenPos.y-4.0 * depth)) * 0.05;

    sum += tex2D( _GrabTexture, float2(screenPos.x-3.0 * depth, screenPos.y+3.0 * depth)) * 0.09;

    sum += tex2D( _GrabTexture, float2(screenPos.x+3.0 * depth, screenPos.y-3.0 * depth)) * 0.09;

    sum += tex2D( _GrabTexture, float2(screenPos.x-2.0 * depth, screenPos.y+2.0 * depth)) * 0.12;

    sum += tex2D( _GrabTexture, float2(screenPos.x+2.0 * depth, screenPos.y-2.0 * depth)) * 0.12;

    sum += tex2D( _GrabTexture, float2(screenPos.x-1.0 * depth, screenPos.y+1.0 * depth)) *  0.15;

    sum += tex2D( _GrabTexture, float2(screenPos.x+1.0 * depth, screenPos.y-1.0 * depth)) *  0.15;

    sum += tex2D( _GrabTexture, screenPos-5.0 * depth) * 0.025;   

    sum += tex2D( _GrabTexture, screenPos-4.0 * depth) * 0.05;

    sum += tex2D( _GrabTexture, screenPos-3.0 * depth) * 0.09;

    sum += tex2D( _GrabTexture, screenPos-2.0 * depth) * 0.12;

    sum += tex2D( _GrabTexture, screenPos-1.0 * depth) * 0.15;   

    sum += tex2D( _GrabTexture, screenPos) * 0.16;

    sum += tex2D( _GrabTexture, screenPos+5.0 * depth) * 0.15;

    sum += tex2D( _GrabTexture, screenPos+4.0 * depth) * 0.12;

    sum += tex2D( _GrabTexture, screenPos+3.0 * depth) * 0.09;

    sum += tex2D( _GrabTexture, screenPos+2.0 * depth) * 0.05;

    sum += tex2D( _GrabTexture, screenPos+1.0 * depth) * 0.025;

    return sum/2;

}

ENDCG

        }

    }

Fallback Off

}