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Assets/Samples/XR Interaction Toolkit/3.0.8/Starter Assets/Shaders/BiRP_Fresnel.shader

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+Shader "XRIT/BiRP_Fresnel"
+{
+    Properties
+    {
+        _BaseColor ("_BaseColor", Color) = (0, 0, 0, 1)
+        _MainTex ("Texture", 2D) = "white" {}
+        _Smoothness ("Smoothness", Range(0, 1)) = 0
+        _Metallic ("Metalness", Range(0, 1)) = 0
+        _RimColor ("_RimColor", Color) = (1,1,1,1)
+        [PowerSlider(4)]_RimPower ("_RimPower", Range(0.25, 10)) = 1
+    }
+
+    SubShader
+    {
+        Tags
+        {
+            "RenderType"="Opaque"
+        }
+        LOD 200
+
+        CGPROGRAM
+        #if !defined(UNITY_USES_HDRP) && !defined(UNITY_USES_URP)
+        // Physically based Standard lighting model, and enable shadows on all light types
+        #pragma surface surf Standard fullforwardshadows
+
+        // Use shader model 3.0 target, to get nicer looking lighting
+        #pragma target 3.0
+
+        sampler2D _MainTex;
+        fixed4 _BaseColor;
+        half _Smoothness;
+        half _Metallic;
+        float3 _RimColor;
+        float _RimPower;
+
+        struct Input
+        {
+            float2 uv_MainTex;
+            float3 worldNormal;
+            float3 viewDir;
+            INTERNAL_DATA
+        };
+
+        // Add instancing support for this shader. You need to check 'Enable Instancing' on materials that use the shader.
+        // See https://docs.unity3d.com/Manual/GPUInstancing.html for more information about instancing.
+        // #pragma instancing_options assumeuniformscaling
+        UNITY_INSTANCING_BUFFER_START(Props)
+        UNITY_INSTANCING_BUFFER_END(Props)
+
+        half4 LightingSimpleLambert (SurfaceOutput s, half3 lightDir, half atten) {
+              half NdotL = dot (s.Normal, lightDir);
+              half4 c;
+              c.rgb = s.Albedo * _LightColor0.rgb * (NdotL * atten);
+              c.a = s.Alpha;
+              return c;
+          }
+
+        void surf(Input i, inout SurfaceOutputStandard o)
+        {
+            //sample and tint albedo texture
+            fixed4 col = tex2D(_MainTex, i.uv_MainTex);
+            col *= _BaseColor;
+            o.Albedo = col.rgb;
+            //just apply the values for metalness and smoothness
+            o.Metallic = _Metallic;
+            o.Smoothness = _Smoothness;
+            //get the dot product between the normal and the view direction
+            float fresnel = dot(i.worldNormal, i.viewDir);
+            //invert the fresnel so the big values are on the outside
+            fresnel = saturate(1 - fresnel);
+            //raise the fresnel value to the exponents power to be able to adjust it
+            fresnel = pow(fresnel, _RimPower);
+            //combine the fresnel value with a color
+            float3 fresnelColor = fresnel * _RimColor;
+            //apply the fresnel value to the emission
+            o.Emission = fresnelColor;
+        }
+        #endif
+        ENDCG
+    }
+    FallBack "Diffuse"
+    FallBack "Standard"
+}