Demo 47 - Diffuse per fragment

Shader "Custom/Diffuse per fragment"
{
    Properties
    {
        _MainTex ("Texture", 2D) = "white" {}
    }

    SubShader
    {
        Pass {
            Tags { "LightMode" = "ForwardBase" }

            CGPROGRAM
                #pragma vertex vert
                #pragma fragment frag
                #include "UnityCG.cginc"

                struct v2f {
                    float4 pos : SV_POSITION;
                    float2 uv : TEXCOORD0;
                    float3 normal : NORMAL;
                };

                sampler2D _MainTex;
                float4 _MainTex_ST;

                v2f vert(appdata_full v)
                {
                    v2f o;
                    o.pos = mul(UNITY_MATRIX_MVP, v.vertex);
                    o.uv = TRANSFORM_TEX(v.texcoord, _MainTex);
                    o.normal = normalize(mul(v.normal, unity_WorldToObject).xyz);

                    return o;
                }

                fixed4 _LightColor0;

                fixed4 frag(v2f i) : SV_Target {
                    float dif = max(0.0, dot(i.normal, normalize(_WorldSpaceLightPos0.xyz)));
                    fixed4 col = tex2D(_MainTex, i.uv);
                    return fixed4(col.rgb * dif * _LightColor0.rgb, 1);
                }
            ENDCG
        }
    }
}