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kennir/SpritesClippedShader.shader

Created July 13, 2016 05:58
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  1. Ken Zhang created this gist Jul 13, 2016.
    90 changes: 90 additions & 0 deletions SpritesClippedShader.shader
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,90 @@
    Shader "Sprites/Clipped"
    {
    Properties
    {
    [PerRendererData] _MainTex ("Sprite Texture", 2D) = "white" {}
    _Color ("Tint", Color) = (1,1,1,1)
    [MaterialToggle] PixelSnap ("Pixel snap", Float) = 0
    _ClipX ("Clip X", Range(0.0, 2000.0)) = 0
    _ClipY ("Clip Y", Range(0.0, 1000.0)) = 0
    _Width ("Width", Range(0.0, 2000.0)) = 2000
    _Height ("Height", Range(0.0, 1000.0)) = 1000
    }

    SubShader
    {
    Tags
    {
    "Queue"="Transparent"
    "IgnoreProjector"="True"
    "RenderType"="Transparent"
    "PreviewType"="Plane"
    "CanUseSpriteAtlas"="True"
    }

    Cull Off
    Lighting Off
    ZWrite Off
    Blend One OneMinusSrcAlpha

    Pass
    {
    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    #pragma multi_compile _ PIXELSNAP_ON
    #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 texcoord : TEXCOORD0;
    float2 screenPos : TEXCOORD1;
    };

    fixed4 _Color;

    v2f vert(appdata_t IN)
    {
    v2f OUT;
    OUT.vertex = mul(UNITY_MATRIX_MVP, IN.vertex);
    OUT.texcoord = IN.texcoord;
    OUT.color = IN.color * _Color;
    #ifdef PIXELSNAP_ON
    OUT.vertex = UnityPixelSnap (OUT.vertex);
    #endif
    OUT.screenPos.xy = ComputeScreenPos(OUT.vertex).xy * _ScreenParams.xy;

    return OUT;
    }

    sampler2D _MainTex;
    float _Width;
    float _Height;
    float _ClipX;
    float _ClipY;

    fixed4 frag(v2f IN) : SV_Target
    {
    if ((IN.screenPos.x < _ClipX) || (IN.screenPos.x > _ClipX + _Width) || (IN.screenPos.y < _ClipY) || (IN.screenPos.y > _ClipY + _Height))
    {
    fixed4 transparent = fixed4(0, 0, 0, 0);
    return transparent;
    }

    fixed4 c = tex2D(_MainTex, IN.texcoord) * IN.color;
    c.rgb *= c.a;
    return c;
    }
    ENDCG
    }
    }
    }