1 files changed, 128 insertions, 0 deletions
diff --git a/Assets/ThirdParty/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_IndirectSpecularLight.shader b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_IndirectSpecularLight.shader
new file mode 100644
index 00000000..6c48d9e6
--- /dev/null
+++ b/Assets/ThirdParty/AmplifyShaderEditor/Plugins/EditorResources/Previews/Preview_IndirectSpecularLight.shader
@@ -0,0 +1,128 @@
+Shader "Hidden/IndirectSpecularLight"
+{
+	Properties
+	{
+		_Skybox("_Skybox", CUBE) = "white" {}
+		_A ("Normal", 2D) = "white" {}
+		_B ("Smoothness", 2D) = "white" {}
+		_C ("Occlusion", 2D) = "white" {}
+	}
+
+	SubShader
+	{
+		Pass // not connected
+		{
+			CGPROGRAM
+			#pragma vertex vert_img
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			#include "Lighting.cginc"
+			#include "UnityPBSLighting.cginc"
+
+			uniform samplerCUBE _Skybox;
+			sampler2D _A;
+			sampler2D _B;
+			sampler2D _C;
+
+			float4 frag(v2f_img i) : SV_Target
+			{
+				float2 xy = 2 * i.uv - 1;
+				float z = -sqrt(1-saturate(dot(xy,xy)));
+				float3 worldNormal = normalize(float3(xy, z));
+				float3 vertexPos = float3(xy, z);
+				float3 worldViewDir = normalize(float3(0,0,-5) - vertexPos);
+
+				float3 worldRefl = -worldViewDir;
+				worldRefl = normalize(reflect( worldRefl, worldNormal ));
+
+				float3 sky = texCUBElod( _Skybox, float4(worldRefl, (1-saturate(tex2D(_B,i.uv).r)) * 6) ).rgb;
+
+				return float4(sky * tex2D(_C,i.uv).r, 1);
+			}
+			ENDCG
+		}
+
+		Pass // connected tangent
+		{
+			CGPROGRAM
+			#pragma vertex vert_img
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			#include "Lighting.cginc"
+			#include "UnityPBSLighting.cginc"
+
+			uniform samplerCUBE _Skybox;
+			sampler2D _A;
+			sampler2D _B;
+			sampler2D _C;
+
+			float4 frag(v2f_img i) : SV_Target
+			{
+				float2 xy = 2 * i.uv - 1;
+				float z = -sqrt(1-saturate(dot(xy,xy)));
+				float3 vertexPos = float3(xy, z);
+				float3 normal = normalize(vertexPos);
+				float3 worldNormal = UnityObjectToWorldNormal(normal);
+
+				float3 tangent = normalize(float3( -z, xy.y*0.01, xy.x ));
+				float3 worldPos = mul(unity_ObjectToWorld, float4(vertexPos,1)).xyz;
+				float3 worldViewDir = normalize(float3(0,0,-5) - vertexPos);
+				
+				float3 worldTangent = UnityObjectToWorldDir(tangent);
+				float tangentSign = -1;
+				float3 worldBinormal = normalize( cross(worldNormal, worldTangent) * tangentSign);
+				float4 tSpace0 = float4(worldTangent.x, worldBinormal.x, worldNormal.x, worldPos.x);
+				float4 tSpace1 = float4(worldTangent.y, worldBinormal.y, worldNormal.y, worldPos.y);
+				float4 tSpace2 = float4(worldTangent.z, worldBinormal.z, worldNormal.z, worldPos.z);
+
+				float3 worldRefl = -worldViewDir;
+
+				float2 sphereUVs = i.uv;
+				sphereUVs.x = atan2(vertexPos.x, -vertexPos.z) / (UNITY_PI) + 0.5;
+				
+				// Needs further checking
+				//float3 tangentNormal = tex2Dlod(_A, float4(sphereUVs,0,0)).xyz;
+				float3 tangentNormal = tex2D(_A, sphereUVs).xyz;
+
+				worldRefl = reflect( worldRefl, half3( dot( tSpace0.xyz, tangentNormal ), dot( tSpace1.xyz, tangentNormal ), dot( tSpace2.xyz, tangentNormal ) ) );
+
+				float3 sky = texCUBElod( _Skybox, float4(worldRefl, (1-saturate(tex2D(_B,i.uv).r)) * 6) ).rgb;
+
+				return float4(sky * tex2D(_C,i.uv).r, 1);
+			}
+			ENDCG
+		}
+
+		Pass // connected world
+		{
+			CGPROGRAM
+			#pragma vertex vert_img
+			#pragma fragment frag
+			#include "UnityCG.cginc"
+			#include "Lighting.cginc"
+			#include "UnityPBSLighting.cginc"
+
+			uniform samplerCUBE _Skybox;
+			sampler2D _A;
+			sampler2D _B;
+			sampler2D _C;
+
+			float4 frag(v2f_img i) : SV_Target
+			{
+				float2 xy = 2 * i.uv - 1;
+				float z = -sqrt(1-saturate(dot(xy,xy)));
+				float3 vertexPos = float3(xy, z);
+				float3 normal = normalize(vertexPos);
+				float3 worldNormal = tex2D( _A, i.uv );
+				float3 worldViewDir = normalize(float3(0,0,-5) - vertexPos);
+				
+				float3 worldRefl = reflect( -worldViewDir, worldNormal );
+
+				float3 sky = texCUBElod( _Skybox, float4(worldRefl, (1-saturate(tex2D(_B,i.uv).r)) * 6) ).rgb;
+
+				return float4(sky * tex2D(_C,i.uv).r, 1);
+			}
+			ENDCG
+		}
+	}
+}