Helios - LYN-3250 - Fixed morph targets for meshes that had multiple … (#696)

* Helios - LYN-3250 - Fixed morph targets for meshes that had multiple materials (#374)

Fixed morph targets for meshes that had multiple materials and were split by AssImp: Recombined them into one mesh in the O3DE scene graph, so the behavior would match FBX SDK.

Code/Tools/SceneAPI/FbxSceneBuilder/Importers/Utilities/RenamedNodesMap.cpp

@@ -27,6 +27,7 @@ namespace AZ
                 Containers::SceneGraph::NodeIndex parentNode, const char* defaultName)
             {
                 AZ_TraceContext("Node name", name);
+                const AZStd::string originalNodeName(name);
 
                 bool isNameUpdated = false;
                 // Nodes can't have an empty name, except of the root, otherwise nodes can't be referenced.
@@ -56,7 +57,7 @@ namespace AZ
                 // can't reference the same parent in that case. This is to make sure the node can be quickly found as
                 // the full path will be unique. To fix any issues, an index is appended.
                 size_t index = 1;
-                size_t offset = name.length();
+                const size_t offset = name.length();
                 while (graph.Find(parentNode, name).IsValid())
                 {
                     // Remove the previously tried extension.
@@ -71,7 +72,8 @@ namespace AZ
                 if (isNameUpdated)
                 {
                     AZ_TraceContext("New node name", name);
-                    AZ_TracePrintf(Utilities::WarningWindow, "The name of the node was invalid or conflicting and was updated.");
+                    AZ_TracePrintf(Utilities::WarningWindow, "The name of the node '%s' was invalid or conflicting and was updated to '%s'.",
+                        originalNodeName.c_str(), name.c_str());
                 }
 
                 return isNameUpdated;