1 files changed, 46 insertions, 0 deletions
diff --git a/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Operators/NegateNode.cs b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Operators/NegateNode.cs
new file mode 100644
index 00000000..00c174dc
--- /dev/null
+++ b/Assets/AmplifyShaderEditor/Plugins/Editor/Nodes/Operators/NegateNode.cs
@@ -0,0 +1,46 @@
+using System;
+
+namespace AmplifyShaderEditor
+{
+    [Serializable]
+    [NodeAttributes( "Negate", "Math Operators", "Negate or invert an input value" )]
+    public sealed class NegateNode : ParentNode
+    {
+        protected override void CommonInit( int uniqueId )
+        {
+            base.CommonInit( uniqueId );
+            AddInputPort( WirePortDataType.FLOAT, false, Constants.EmptyPortValue );
+            AddOutputPort( WirePortDataType.FLOAT, Constants.EmptyPortValue );
+			m_useInternalPortData = true;
+			m_previewShaderGUID = "b035bc40da1ac7c4eafad4116382ec79";
+		}
+
+        public override void OnInputPortConnected( int portId, int otherNodeId, int otherPortId, bool activateNode = true )
+        {
+            base.OnInputPortConnected( portId, otherNodeId, otherPortId, activateNode );
+            m_inputPorts[ 0 ].MatchPortToConnection();
+            m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
+        }
+
+        public override void OnConnectedOutputNodeChanges( int outputPortId, int otherNodeId, int otherPortId, string name, WirePortDataType type )
+        {
+            base.OnConnectedOutputNodeChanges( outputPortId, otherNodeId, otherPortId, name, type );
+            m_inputPorts[ 0 ].MatchPortToConnection();
+            m_outputPorts[ 0 ].ChangeType( m_inputPorts[ 0 ].DataType, false );
+        }
+
+        public override string GenerateShaderForOutput( int outputId, ref MasterNodeDataCollector dataCollector, bool ignoreLocalvar )
+        {
+            string result = m_inputPorts[ 0 ].GeneratePortInstructions( ref dataCollector );
+
+            if ( result.StartsWith( "-" ) )
+            {
+                return result.Remove( 0, 1 );
+            }
+            else
+            {
+                return "-" + result;
+            }
+        }
+    }
+}