【Unity】バンプマッピング【Shader】

BumpMapping.shader

Shader "Custom/BumpMapping" {
	Properties {
		_Color ("Color", Color) = (1,1,1,1)
    		_MainTex("MainTexture", 2D) = "white" {}
        
    		_BumpMap("NormalMap", 2D) = "white" {}
    		_BumpScale("NormalScale", Range(0,1)) = 0.5
        
		_Glossiness ("Smoothness", Range(0,1)) = 0.5
		_Metallic ("Metallic", Range(0,1)) = 0.0
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200

		CGPROGRAM
		#pragma surface surf Standard fullforwardshadows
    		#pragma target 3.0
        	
    		fixed4 _Color;
    		sampler2D _MainTex;
        
    		sampler2D _BumpMap;
    		half _BumpScale;
        
    		half _Glossiness;
    		half _Metallic;
        
		struct Input {
			float2 uv_MainTex;
		};
        
		void surf (Input IN, inout SurfaceOutputStandard o) {
			fixed4 c = tex2D (_MainTex, IN.uv_MainTex) * _Color;
			o.Albedo = c.rgb;
			o.Metallic = _Metallic;
			o.Smoothness = _Glossiness;
			o.Alpha = c.a;
            
      			//BumpMapping
      			fixed4 n = tex2D (_BumpMap, IN.uv_MainTex);
      			o.Normal = UnpackScaleNormal(n, _BumpScale);
		}
		ENDCG
	}
	FallBack "Diffuse"
}