1 files changed, 59 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/DiffuseAndSpecularFromMetallicNode.cs b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/DiffuseAndSpecularFromMetallicNode.cs
new file mode 100644
index 00000000..af599335
--- /dev/null
+++ b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/HelperFuncs/DiffuseAndSpecularFromMetallicNode.cs
@@ -0,0 +1,59 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+using System;
+
+namespace AmplifyShaderEditor
+{
+	[Serializable]
+	[NodeAttributes( "Diffuse And Specular From Metallic", "Miscellaneous", "Gets Diffuse and Specular values from Metallic. Uses DiffuseAndSpecularFromMetallic function from UnityStandardUtils." )]
+	public class DiffuseAndSpecularFromMetallicNode : ParentNode
+	{
+		//half3 DiffuseAndSpecularFromMetallic (half3 albedo, half metallic, out half3 specColor, out half oneMinusReflectivity)
+		private const string FuncFormat = "DiffuseAndSpecularFromMetallic({0},{1},{2},{3})";
+		protected override void CommonInit( int uniqueId )
+		{
+			base.CommonInit( uniqueId );
+			AddInputPort( WirePortDataType.FLOAT3, false, "Albedo" );
+			AddInputPort( WirePortDataType.FLOAT, false, "Metallic" );
+			AddOutputPort( WirePortDataType.FLOAT3, "Out" );
+			AddOutputPort( WirePortDataType.FLOAT3, "Spec Color" );
+			AddOutputPort( WirePortDataType.FLOAT, "One Minus Reflectivity" );
+			m_previewShaderGUID = "c7c4485750948a045b5dab0985896e17";
+		}
+
+		public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
+		{
+			if( dataCollector.IsSRP )
+			{
+				UIUtils.ShowMessage( UniqueId, "Diffuse And Specular From Metallic Node not compatible with SRP" );
+				return m_outputPorts[0].ErrorValue;
+			}
+
+			if( m_outputPorts[ outputId ].IsLocalValue( dataCollector.PortCategory ) )
+			{
+				return m_outputPorts[ outputId ].LocalValue( dataCollector.PortCategory );
+			}
+
+			dataCollector.AddToIncludes( UniqueId, Constants.UnityStandardUtilsLibFuncs );
+
+			string albedo = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
+			string metallic = m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector );
+
+			string specColorVar = "specColor" + OutputId;
+			string oneMinusReflectivityVar = "oneMinusReflectivity" + OutputId;
+			string varName = "diffuseAndSpecularFromMetallic" + OutputId;
+
+			dataCollector.AddLocalVariable( UniqueId, PrecisionType.Half, WirePortDataType.FLOAT3, specColorVar, "(0).xxx" );
+			dataCollector.AddLocalVariable( UniqueId, PrecisionType.Half, WirePortDataType.FLOAT, oneMinusReflectivityVar, "0" );
+
+
+			string varValue = string.Format( FuncFormat, albedo, metallic, specColorVar, oneMinusReflectivityVar );
+			dataCollector.AddLocalVariable( UniqueId, PrecisionType.Half, WirePortDataType.FLOAT3, varName, varValue );
+			m_outputPorts[ 0 ].SetLocalValue( varName, dataCollector.PortCategory );
+			m_outputPorts[ 1 ].SetLocalValue( specColorVar, dataCollector.PortCategory );
+			m_outputPorts[ 2 ].SetLocalValue( oneMinusReflectivityVar, dataCollector.PortCategory );
+
+			return m_outputPorts[ outputId ].LocalValue( dataCollector.PortCategory );
+		}
+	}
+}