Fixes to IsFrontFace node

com.unity.shadergraph/Editor/Data/Nodes/Input/Geometry/FaceSignNode.cs

 
 namespace UnityEditor.ShaderGraph
 {
-	[Title("Input", "Geometry", "Face Sign")]
-	public class FaceSignNode : AbstractMaterialNode, IGeneratesBodyCode, IMayRequireFaceSign
+	[Title("Utility", "Logic", "Is Front Face")]
+	public class IsFrontFaceNode : AbstractMaterialNode, IGeneratesBodyCode, IMayRequireFaceSign
-		public FaceSignNode()
+		public IsFrontFaceNode()
-			name = "Face Sign";
+			name = "Is Front Face";
-			get { return "https://github.com/Unity-Technologies/ShaderGraph/wiki/Face-Sign-Node"; }
+			get { return "https://github.com/Unity-Technologies/ShaderGraph/wiki/Is-Front-Face-Node"; }
-        private const string kOutputSlotName = "Is Front";
+        private const string kOutputSlotName = "Out";
 
 		public override void UpdateNodeAfterDeserialization()
         {
 
         public void GenerateNodeCode(ShaderGenerator visitor, GenerationMode generationMode)
         {
-            visitor.AddShaderChunk(string.Format("{0} {1} = IN.{2};", precision, GetVariableNameForSlot(OutputSlotId), ShaderGeneratorNames.FaceSign), true);
+            visitor.AddShaderChunk(string.Format("{0} {1} = max(0, IN.{2});", precision, GetVariableNameForSlot(OutputSlotId), ShaderGeneratorNames.FaceSign), true);
         }
 
 		public bool RequiresFaceSign(ShaderStageCapability stageCapability = ShaderStageCapability.Fragment)