Surface-customlighting copy.shader

Shader "Unite-2019/Diffuse Texture-Mod" {
        Properties {
            _MainTex ("Texture", 2D) = "white" {}
        }
//modularization
CGINCLUDE
struct Input {
            float2 uv_MainTex;
        };

ENDCG

        SubShader {
        Tags { "RenderType" = "Opaque" }
        CGPROGRAM
          #pragma surface surf SimpleLambert
        
        // High optimization by using half datatype /precision
        
        half4 LightingSimpleLambert(SurfaceOutput s,half3 lightDir,half atten)
        {
half NdotL= dot(s.Normal,lightDir);
half4 c;
c.rgb= s.Albedo * _LightColor0.rgb*(NdotL*atten);
c.a=s.Alpha;
return c;

        }



        sampler2D _MainTex;
        
        void surf (Input IN, inout SurfaceOutput o) {
            o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb;
        }
        ENDCG
        }
        Fallback "Diffuse"
    }