Shader "Custom/ItemGlow" {
	Properties {
		_ColorTint("Color Tint", Color) = (1,1,1,1)
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_BumpMap("Normal Map", 2D) = "bump" {}
		_RimColor("Rim Color", Color) = (1,1,1,1)
		_RimPower("Rim Power", Range(1.0,6.0)) = 3.0  
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
				
		CGPROGRAM
		#pragma surface surf Lambert

		struct Input {
		float4 color : Color;
			float2 uv_MainTex;
			float2 uv_BumpMap;
			float3 viewDir;
		};
		
		float4 _ColorTint;
		sampler2D _MainTex;
		sampler2D _BumpMap;
		float4 _RimColor;
		float _RimPower;

		void surf (Input IN, inout SurfaceOutput o) {
			IN.color = _ColorTint;
			o.Albedo = tex2D (_MainTex, IN.uv_MainTex).rgb * IN.color;
			o.Normal = UnpackNormal (tex2D(_BumpMap, IN.uv_BumpMap));
			
			half rim = 1.0 -saturate(dot(normalize(IN.viewDir), o.Normal));
			o.Emission= _RimColor.rgb * pow(rim, _RimPower);
		}
		ENDCG
	} 
	FallBack "Diffuse"
}