Ch2TexturedShader1.shader

Shader "CookbookShaders/TexturedShader" 
{
	Properties 
	{
  		...
    		// In the properties section we can refer to a texture like this:
		_MainTex ("Albedo (RGB)", 2D) = "white" {}]
		...
	}
	
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf Standard fullforwardshadows
		#pragma target 3.0

    		// In the CGProgram section the texture is defined as sampler2D, the standard type for 2D textures:
		sampler2D _MainTex;

    		// This is the input parameter for the surface function and contains a packed array
		struct Input 
		{
			float2 uv_MainTex;
		};

		...

		void surf (Input IN, inout SurfaceOutputStandard o) 
		{
	  		// Every time the surf() surface function is called, the Input structure will contain 
	  		// the UV of _MainTex for the specific point of the 3D model that needs to be rendered.
	  		// The shader recognizes the name uv_MainTex and initializes it automatically.
			fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
			...
		}
		ENDCG
	}
	FallBack "Diffuse"
}