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// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

// Upgrade NOTE: replaced 'mul(UNITY_MATRIX_MVP,*)' with 'UnityObjectToClipPos(*)'

Shader "Custom/testShader" {
 properties{
    _TextureSample0("Texture Sample 0", 2D) = "white" {}
    _normal("normal", 2D) = "white" {}
 }
 subshader {
    pass{
        Tags{ "RenderType" = "Opaque" "IsEmissive" = "true"  }
         CGPROGRAM
         #pragma vertex vert
         #pragma fragment frag 
         #include "Lighting.cginc"
         


         uniform sampler2D _TextureSample0;
         uniform sampler2D _normal;
         uniform float4 _normal_ST;

         struct a2v
         {
             float3 vertex : POSITION;        
             float3 normal : NORMAL;                  
             float4 texcoord : TEXCOORD0;      
         };

         struct v2f
         {
             float4 pos : SV_POSITION;           //告诉unity，pos里包含了顶点在裁剪空间中的位置信息
             fixed3 worldNormal:TEXCOORD0;
             
         };

           v2f vert(a2v v)
           {
              v2f o;
              o.pos = UnityObjectToClipPos(v.vertex);       //使用v.vertex来访问模型空间的顶点坐标
              o.worldNormal=mul(v.normal,(float3x3)unity_WorldToObject);
              return o ;
           }

            fixed4 frag() : SV_Target
            {

                   return fixed4(1.0, 1.0, 1.0, 1.0);
            }
            ENDCG
    }
 }
}