7、UI流光效果

1、建立材质
2、写Shader
3、流光Texture样式赋值
4、把材质给UI

Shader "Sprites/FlowLight"
 {
    Properties
    {
    [PerRendererData]
        _MainTex("Sprite Texture", 2D) = "white" {}
        _Color("Tint", Color) = (1, 1, 1, 1)
    [MaterialToggle] 
        PixelSnap("Pixel snap", float) = 0
        _FlowlightTex("Flowlight Texture", 2D) = "white" {}
        _Power("Power", float) = 1
        _SpeedX("SpeedX", float) = 1
        _SpeedY("SpeedY", float) = 0
        //以下代码块可以有效防止Editor报缺失参数的错误（笔者踩过的坑）
        _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
        //-----
    }
    
     SubShader
     {
        Tags{   
            "Queue" = "Transparent"
            "IgnoreProjector" = "True"
            "RenderType" = "Transparent"
            "PreviewType" = "Plane"
            "CanUseSpriteAtlas" = "True"
        }
          //以下代码块可以有效防止Editor报缺失参数的错误（笔者踩过的坑）
        Stencil{
            Ref[_Stencil]
            Comp[_StencilComp]
            Pass[_StencilOp]
            ReadMask[_StencilReadMask]
            WriteMask[_StencilWriteMask]
        }
        //----
        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;
                 half2 texflow : TEXCOORD1;
            };
        fixed4 _Color;
        sampler2D _FlowlightTex;
            fixed4 _FlowlightTex_ST;
            fixed _SpeedX;
            fixed _SpeedY;
    
             v2f vert(appdata_t IN)
             {
                 v2f OUT;
                 OUT.vertex = UnityObjectToClipPos(IN.vertex);
                 OUT.texcoord = IN.texcoord;
                 OUT.texflow = TRANSFORM_TEX(IN.texcoord, _FlowlightTex);
                 OUT.texflow.x += _Time * _SpeedX;
                 OUT.texflow.y += _Time * _SpeedY;
                 OUT.color = IN.color * _Color;
             #ifdef PIXELSNAP_ON
                 OUT.vertex = UnityPixelSnap(OUT.vertex);
             #endif
                    
                 return OUT;
             }
            
             sampler2D _MainTex;
             float _Power;
            
             fixed4 frag(v2f IN) : SV_Target
             {
                 fixed4 c = tex2D(_MainTex, IN.texcoord);
                 fixed4 cadd = tex2D(_FlowlightTex, IN.texflow) * _Power;
                 cadd.rgb *= c.rgb;
                 c.rgb += cadd.rgb;
                 c.rgb *= c.a;
                 return c;
             }
        ENDCG
       }
   }
}

流光材质贴图示例