简单纹理复制

Shader "Custom/Base" {
    Properties
    {
        _Color("Base Color", Color) = (1,1,1,1)
        _MainTex("Base(RGB)", 2D) = "white" {}
    }
    
    SubShader
    {
        tags{"Queue" = "Transparent" "RenderType" = "Transparent" "IgnoreProjector" = "True"}
        Blend SrcAlpha OneMinusSrcAlpha
        
        Pass
        {
            Name "Simple"
            Cull off
            
            CGPROGRAM
            #pragma vertex vert
            #pragma fragment frag
            #include "UnityCG.cginc"
            
            float4 _Color;
            sampler2D _MainTex;
            float _RSpeed;
            
            struct v2f
            {
                float4 pos:POSITION;
                float2 uv:TEXCOORD0;
            };
            
            float4 _MainTex_ST;//界面的Tiling、Offset显示。
            v2f vert(appdata_base v)
            {
                v2f o;
                o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
                o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);//重复显示UV，通过界面的Tiling、Offset
                return o;
            }
            
            half4 frag(v2f i):COLOR
            {
                half4 c = tex2D(_MainTex , i.uv) * _Color;
                return c;
            }
            
            ENDCG
        }
    }
}