Laboratoř ČeskýchHer.cz - PasteBin

Vložit nový kód

Shader "Custom/Fresnel" {
	Properties {
		_MainTex ("Base (RGB)", 2D) = "white" {}
		_Reflection ("Reflection (RGB)", Cube) = "white" {}
		_Color	("Color", Color) = (1.0, 1.0, 1.0, 0)
		_FresnelPower ("Fresnel Power", Float) = 2
		_FresnelBias ("Fresnel Bias", Float) = 0.1
	}
	SubShader {
		Tags { "RenderType"="Opaque" }
		LOD 200
		
		CGPROGRAM
		#pragma surface surf BlinnPhong 
 
		sampler2D _MainTex;
		samplerCUBE _Reflection;
		float4 _Color;
		float _FresnelPower;
		float _FresnelBias;
 
		struct Input {
			float2 uv_MainTex;
			float3 worldRefl;			
			float3 worldNormal; 
			float3 viewDir;
		};
		
		float fresnel(float3 I, float3 N, float power, float bias)
		{					  				
			return saturate(pow(1.0-abs(dot(I, N)), power) + bias);
		}
 
		void surf (Input IN, inout SurfaceOutput o) 
		{
			float fres = fresnel(normalize(IN.viewDir), IN.worldNormal, _FresnelPower, _FresnelBias);
			half4 r = texCUBE(_Reflection, IN.worldRefl);
			half4 c = tex2D (_MainTex, IN.uv_MainTex);
			o.Albedo = lerp(c.rgb * _Color.rgb, r.rgb, fres * c.a);
			o.Alpha = 0.0;
		}
		ENDCG
	} 
	FallBack "Diffuse"
}