1 files changed, 123 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Vertex/BillboardNode.cs b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Vertex/BillboardNode.cs
new file mode 100644
index 00000000..0cb8787a
--- /dev/null
+++ b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Vertex/BillboardNode.cs
@@ -0,0 +1,123 @@
+// Amplify Shader Editor - Visual Shader Editing Tool
+// Copyright (c) Amplify Creations, Lda <info@amplify.pt>
+
+using System;
+using UnityEngine;
+using UnityEditor;
+namespace AmplifyShaderEditor
+{
+	[Serializable]
+	[NodeAttributes( "Billboard", "Miscellaneous", "Calculates new Vertex positions and normals to achieve a billboard effect." )]
+	public sealed class BillboardNode : ParentNode
+	{
+		private const string ErrorMessage = "Billboard node should only be connected to vertex ports.";
+		private const string WarningMessage = "This node is a bit different from all others as it injects the necessary code into the vertex body and writes directly on the vertex position and normal.\nIt outputs a value of 0 so it can be connected directly to a vertex port.\n[Only if that port is a relative vertex offset].";
+
+		[SerializeField]
+		private BillboardType m_billboardType = BillboardType.Cylindrical;
+
+		[SerializeField]
+		private bool m_rotationIndependent = false;
+
+		private UpperLeftWidgetHelper m_upperLeftWidget = new UpperLeftWidgetHelper();
+
+		protected override void CommonInit( int uniqueId )
+		{
+			base.CommonInit( uniqueId );
+			AddOutputPort( WirePortDataType.FLOAT3, "Out" );
+			m_textLabelWidth = 115;
+			m_hasLeftDropdown = true;
+			SetAdditonalTitleText( string.Format( Constants.SubTitleTypeFormatStr, m_billboardType ) );
+		}
+
+		public override void Destroy()
+		{
+			base.Destroy();
+			m_upperLeftWidget = null;
+		}
+
+		public override void AfterCommonInit()
+		{
+			base.AfterCommonInit();
+
+			if( PaddingTitleLeft == 0 )
+			{
+				PaddingTitleLeft = Constants.PropertyPickerWidth + Constants.IconsLeftRightMargin;
+				if( PaddingTitleRight == 0 )
+					PaddingTitleRight = Constants.PropertyPickerWidth + Constants.IconsLeftRightMargin;
+			}
+		}
+
+		public override void Draw( DrawInfo drawInfo )
+		{
+			base.Draw( drawInfo );
+			m_upperLeftWidget.DrawWidget<BillboardType>( ref m_billboardType, this, OnWidgetUpdate );
+		}
+
+		private readonly Action<ParentNode> OnWidgetUpdate = ( x ) =>
+		{
+			x.SetAdditonalTitleText( string.Format( Constants.SubTitleTypeFormatStr, ( x as BillboardNode ).Type ) );
+		};
+
+		public override void DrawProperties()
+		{
+			base.DrawProperties();
+			NodeUtils.DrawPropertyGroup( ref m_propertiesFoldout, Constants.ParameterLabelStr, () =>
+			 {
+				 EditorGUI.BeginChangeCheck();
+				 m_billboardType = (BillboardType)EditorGUILayoutEnumPopup( BillboardOpHelper.BillboardTypeStr, m_billboardType );
+				 if( EditorGUI.EndChangeCheck() )
+				 {
+					 SetAdditonalTitleText( string.Format( Constants.SubTitleTypeFormatStr, m_billboardType ) );
+				 }
+				 m_rotationIndependent = EditorGUILayoutToggle( BillboardOpHelper.BillboardRotIndStr, m_rotationIndependent );
+			 } );
+			EditorGUILayout.HelpBox( WarningMessage, MessageType.Warning );
+		}
+
+		public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
+		{
+			if( dataCollector.IsFragmentCategory )
+			{
+				UIUtils.ShowMessage( UniqueId, ErrorMessage,MessageSeverity.Error );
+				return m_outputPorts[0].ErrorValue;
+			}
+			if( m_outputPorts[ 0 ].IsLocalValue( dataCollector.PortCategory ) )
+				return m_outputPorts[ 0 ].ErrorValue;
+
+			m_outputPorts[ 0 ].SetLocalValue( "0", dataCollector.PortCategory );
+			string vertexPosValue = dataCollector.IsTemplate ? dataCollector.TemplateDataCollectorInstance.GetVertexPosition( WirePortDataType.OBJECT, CurrentPrecisionType ) : "v.vertex";
+			string vertexNormalValue = dataCollector.IsTemplate ? dataCollector.TemplateDataCollectorInstance.GetVertexNormal( CurrentPrecisionType ) : "v.normal";
+			bool vertexIsFloat3 = false;
+			if( dataCollector.IsTemplate )
+			{
+				InterpDataHelper info = dataCollector.TemplateDataCollectorInstance.GetInfo( TemplateInfoOnSematics.POSITION );
+				if( info != null )
+				{
+					vertexIsFloat3 = info.VarType == WirePortDataType.FLOAT3;
+				}
+			}
+
+			BillboardOpHelper.FillDataCollector( ref dataCollector, m_billboardType, m_rotationIndependent, vertexPosValue, vertexNormalValue, vertexIsFloat3 );
+
+			return "0";
+		}
+
+		public override void ReadFromString( ref string[] nodeParams )
+		{
+			base.ReadFromString( ref nodeParams );
+			m_billboardType = (BillboardType)Enum.Parse( typeof( BillboardType ), GetCurrentParam( ref nodeParams ) );
+			m_rotationIndependent = Convert.ToBoolean( GetCurrentParam( ref nodeParams ) );
+		}
+
+		public override void WriteToString( ref string nodeInfo, ref string connectionsInfo )
+		{
+			base.WriteToString( ref nodeInfo, ref connectionsInfo );
+			IOUtils.AddFieldValueToString( ref nodeInfo, m_billboardType );
+			IOUtils.AddFieldValueToString( ref nodeInfo, m_rotationIndependent );
+			SetAdditonalTitleText( string.Format( Constants.SubTitleTypeFormatStr, m_billboardType ) );
+		}
+
+		public BillboardType Type { get { return m_billboardType; } }
+	}
+}