1 files changed, 68 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Textures/UnpackScaleNormalNode.cs b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Textures/UnpackScaleNormalNode.cs
new file mode 100644
index 00000000..364cfcca
--- /dev/null
+++ b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Textures/UnpackScaleNormalNode.cs
@@ -0,0 +1,68 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+
+using System;
+namespace AmplifyShaderEditor
+{
+	[NodeAttributes( "Unpack Scale Normal", "Textures", "Applies UnpackNormal/UnpackScaleNormal function" )]
+	[Serializable]
+	public class UnpackScaleNormalNode : ParentNode
+	{
+		protected override void CommonInit( int uniqueId )
+		{
+			base.CommonInit( uniqueId );
+			AddInputPort( WirePortDataType.FLOAT4, false, "Value" );
+			AddInputPort( WirePortDataType.FLOAT, false, "Scale" );
+			m_inputPorts[ 1 ].FloatInternalData = 1;
+			AddOutputVectorPorts( WirePortDataType.FLOAT3, "XYZ" );
+			m_useInternalPortData = true;
+			m_previewShaderGUID = "8b0ae05e25d280c45af81ded56f8012e";
+		}
+
+		public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
+		{
+			string src = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
+			
+
+			bool isScaledNormal = false;
+			if ( m_inputPorts[ 1 ].IsConnected )
+			{
+				isScaledNormal = true;
+			}
+			else
+			{
+				if ( m_inputPorts[ 1 ].FloatInternalData != 1 )
+				{
+					isScaledNormal = true;
+				}
+			}
+
+			string normalMapUnpackMode = string.Empty;
+			string scaleValue = isScaledNormal?m_inputPorts[ 1 ].GeneratePortInstructions( ref dataCollector ):"1.0";
+			normalMapUnpackMode = string.Format( TemplateHelperFunctions.CreateUnpackNormalStr( dataCollector, isScaledNormal, scaleValue ), src);
+			if( isScaledNormal && !( dataCollector.IsTemplate && dataCollector.IsSRP ) )
+			{
+				dataCollector.AddToIncludes( UniqueId, Constants.UnityStandardUtilsLibFuncs );
+			}
+			
+			int outputUsage = 0;
+			for ( int i = 0; i < m_outputPorts.Count; i++ )
+			{
+				if ( m_outputPorts[ i ].IsConnected )
+					outputUsage += 1;
+			}
+
+
+			if ( outputUsage > 1 )
+			{
+				string varName = "localUnpackNormal" + OutputId;
+				dataCollector.AddLocalVariable( UniqueId, "float3 " + varName + " = " + normalMapUnpackMode + ";" );
+				return GetOutputVectorItem( 0, outputId, varName );
+			}
+			else
+			{
+				return GetOutputVectorItem( 0, outputId, normalMapUnpackMode );
+			}
+		}
+	}
+}