motionBlur.shader

Shader "LX/motionBlur"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
    }
    SubShader
    {
        ZTest Always
        Cull Off
        Zwrite Off

        CGINCLUDE
        #include "UnityCG.cginc"

        struct appdata
        {
            float4 vertex : POSITION;
            float2 uv : TEXCOORD0;
        };

        struct v2f
        {
            float2 uvMain : TEXCOORD0;
            float4 vertex : SV_POSITION;
        };

        sampler2D _MainTex;
        float4 _MainTex_ST;
        float blurAmount;

        v2f vert(appdata v)
        {
            v2f o;
            o.vertex = UnityObjectToClipPos(v.vertex);
            o.uvMain = TRANSFORM_TEX(v.uv, _MainTex);

            return o;
        }

        fixed4 fragRGB(v2f i) : SV_Target
        {
            fixed4 col = fixed4(tex2D(_MainTex, i.uvMain).rgb, blurAmount);
            return col;
        }

        fixed4 frag(v2f i) : SV_Target
        {
            fixed4 col = tex2D(_MainTex, i.uvMain);
            return col;
        }
        ENDCG

        Pass
        {
            Blend SrcAlpha OneMinusSrcAlpha
            ColorMask RGB
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment fragRGB
            ENDCG
        }

        Pass
        {
            Blend One Zero
            ColorMask A
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            ENDCG
        }
    }
}