https://github.com/xjine/unity_grabpasssamples

Smallest GrabPass samples are included.
https://github.com/xjine/unity_grabpasssamples

sample shader unity

Last synced: about 1 year ago
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Smallest GrabPass samples are included.

• Host: GitHub
• URL: https://github.com/xjine/unity_grabpasssamples
• Owner: XJINE
• License: bsd-3-clause
• Created: 2018-12-04T04:57:58.000Z (over 7 years ago)
• Default Branch: master
• Last Pushed: 2018-12-04T08:24:11.000Z (over 7 years ago)
• Last Synced: 2025-02-08T22:28:17.340Z (over 1 year ago)
• Topics: sample, shader, unity
• Language: ShaderLab
• Homepage:
• Size: 49.8 KB
• Stars: 1
• Watchers: 3
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# Unity_GrabPassSamples

Smallest ``GrabPass`` samples are included.

GrabPassShaderGrabPassImageEffect





Following code is one of these.

```shader

// NOTE:

// Call after almost objects are rendered.

Tags

{

    "Queue" = "Transparent"

}

GrabPass

{

    "_GrabTex"

}

Pass

{

    CGPROGRAM

    #pragma vertex   vert

    #pragma fragment frag

    #include "UnityCG.cginc"

    struct v2f

    {

        float4 vertex : SV_POSITION;

        float2 uv     : TEXCOORD0;

        float4 uvg    : TEXCOORD1;

    };

    sampler2D _GrabTex;

    sampler2D _MainTex;

    float4    _MainTex_ST;

    

    v2f vert (appdata_base v)

    {

        v2f o;

        o.vertex = UnityObjectToClipPos(v.vertex);

        o.uv     = TRANSFORM_TEX(v.texcoord, _MainTex);

        o.uvg    = ComputeGrabScreenPos(o.vertex);

        return o;

    }

    

    fixed4 frag (v2f i) : SV_Target

    {

        float4 mainColor = tex2D(_MainTex, i.uv);

        // NOTE:

        // Following patterns are same.

        float4 grabColor = tex2Dproj(_GrabTex, i.uvg);

               grabColor = tex2D(_GrabTex, i.uvg.xy / i.uvg.w);

        return mainColor * 0.5 + grabColor * 0.5;

    }

    ENDCG

}

```