Clear out unset fields if attribute does not exists.

Author: andys-sidefx

Plugins/HoudiniEngineUnity/Scripts/Utility/HEU_GeneralUtility.cs

@@ -411,6 +411,9 @@ public static bool GetAttribute<T>(HEU_SessionBase session, HAPI_NodeId geoID, H
 
             if (!bResult || !info.exists)
             {
+                info.exists = false;
+                info.count = 0;
+                info.tupleSize = 0;
                 return false;
             }
 

Plugins/HoudiniEngineUnity/Scripts/Utility/HEU_GenerateGeoCache.cs

@@ -251,11 +251,19 @@ public void GetStringAttributes(HEU_SessionBase session, HAPI_NodeId geoID, HAPI
             // which returns the strings in stringTable and an array stringIndices which reference these strings.
             // This is safer than storing HAPI string handles which can be transient in nature.
 
-            var stringHandles = new HAPI_StringHandle[0]; 
-            HEU_GeneralUtility.GetAttribute(session, GeoID, PartID, name, ref info, ref stringHandles, session.GetAttributeStringData);
-
+            var stringHandles = new HAPI_StringHandle[0];
             var stringLookup = new Dictionary<HAPI_StringHandle, int>();
 
+            bool bResult = HEU_GeneralUtility.GetAttribute(session, GeoID, PartID, name, ref info, ref stringHandles, session.GetAttributeStringData);
+            if (!bResult)
+            {
+                stringIndices = new int[0];
+                info.exists = false;
+                return;
+
+            }
+
+
             stringIndices = new int[info.count * info.tupleSize];
 
             for (int index = 0; index < stringHandles.Length; index++)