Shader-漫反射（像素實現）

• 系統內置漫反射Shader "Diffuse"

  // Upgrade NOTE: replaced '_World2Object' with 'unity_WorldToObject'
  
  Shader "LXC/05 Diffuse Fragment"
  {
  	Properties{
  		_Diffuse("Diffuse Color",Color) = (1,1,1,1)
  	}
  		SubShader
  	{
  		Pass{
  		Tags{ "LightMode" = "ForwardBase" }
  		CGPROGRAM
  #include "Lighting.cginc"
  #pragma vertex vert		
  #pragma fragment frag
  		fixed4 _Diffuse;
  
  	struct a2v {
  		float4 vertex:POSITION;
  		float3 normal:NORMAL;
  	};
  
  	struct v2f {
  		float4 position:SV_POSITION;
  		fixed3 worldNormalDir : COLOR0;
  	};
  
  	v2f vert(a2v v) {
  		v2f f;
  		f.position = UnityObjectToClipPos(v.vertex);		
  		f.worldNormalDir = mul(v.normal, (float3x3) unity_WorldToObject);
  		return f;
  	}
  
  
  	fixed4 frag(v2f f) :SV_Target{
  		fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.rgb;
  		fixed3 normalDir = normalize(f.worldNormalDir);	//沒有發現需要傳遞
  		fixed3 lightDir = normalize(_WorldSpaceLightPos0.xyz);
  		fixed3 diffuse = _LightColor0.rgb * max(dot(normalDir,lightDir),0)*_Diffuse.rgb;
  		fixed3 tempColor = diffuse + ambient;
  		return fixed4(tempColor,1);
  	}
  		ENDCG
  	}
  	}
  		Fallback "Diffuse"	//系統內置漫反射Shader
  }