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unitycoder/scroll-image-ui.shader

Created December 27, 2018 07:36
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  1. unitycoder created this gist Dec 27, 2018.
    120 changes: 120 additions & 0 deletions scroll-image-ui.shader
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,120 @@
    // Unity built-in shader source. Copyright (c) 2016 Unity Technologies. MIT license (see license.txt)

    // unitycoder.com: added simple scrolling UV

    Shader "UI/Default-Scroll"
    {
    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
    _ScrollSpeed ("ScrollSpeed X", Float) = 1

    [Toggle(UNITY_UI_ALPHACLIP)] _UseUIAlphaClip ("Use Alpha Clip", Float) = 0
    }

    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
    {
    Name "Default"
    CGPROGRAM
    #pragma vertex vert
    #pragma fragment frag
    #pragma target 2.0

    #include "UnityCG.cginc"
    #include "UnityUI.cginc"

    #pragma multi_compile __ UNITY_UI_ALPHACLIP

    struct appdata_t
    {
    float4 vertex : POSITION;
    float4 color : COLOR;
    float2 texcoord : TEXCOORD0;
    UNITY_VERTEX_INPUT_INSTANCE_ID
    };

    struct v2f
    {
    float4 vertex : SV_POSITION;
    fixed4 color : COLOR;
    float2 texcoord : TEXCOORD0;
    float4 worldPosition : TEXCOORD1;
    UNITY_VERTEX_OUTPUT_STEREO
    };

    fixed4 _Color;
    fixed4 _TextureSampleAdd;
    float4 _ClipRect;
    float _ScrollSpeed;

    v2f vert(appdata_t IN)
    {
    v2f OUT;
    UNITY_SETUP_INSTANCE_ID(IN);
    UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(OUT);
    OUT.worldPosition = IN.vertex;
    OUT.vertex = UnityObjectToClipPos(OUT.worldPosition);

    OUT.texcoord = IN.texcoord;

    OUT.color = IN.color * _Color;
    return OUT;
    }

    sampler2D _MainTex;

    fixed4 frag(v2f IN) : SV_Target
    {

    float2 scroll = float2(_Time.y*_ScrollSpeed,0);

    half4 color = (tex2D(_MainTex, IN.texcoord+scroll) + _TextureSampleAdd) * IN.color;

    color.a *= UnityGet2DClipping(IN.worldPosition.xy, _ClipRect);

    #ifdef UNITY_UI_ALPHACLIP
    clip (color.a - 0.001);
    #endif

    return color;
    }
    ENDCG
    }
    }
    }