Use GetEntityId for 6.4+

Author: mfe

com.unity.formats.alembic/Runtime/Scripts/Exporter/AlembicExporter_impl.cs

@@ -546,7 +546,11 @@ public override void Setup(Component c)
                     m_target = null;
                     return;
                 }
+#if UNITY_6000_4_OR_NEWER
+                abcObject = parent.abcObject.NewXform(target.name + " (" + EntityId.ToULong(target.GetEntityId()).ToString("X8") + ")", timeSamplingIndex);
+#else
                 abcObject = parent.abcObject.NewXform(target.name + " (" + target.GetInstanceID().ToString("X8") + ")", timeSamplingIndex);
+#endif
                 m_target = target;
             }
 
@@ -976,7 +980,11 @@ CaptureNode ConstructTree(Transform node)
         {
             if (node == null) { return null; }
 
+#if UNITY_6000_4_OR_NEWER
+            int iid = (int)EntityId.ToULong(node.gameObject.GetEntityId());
+#else
             int iid = node.gameObject.GetInstanceID();
+#endif
             CaptureNode cn;
             if (m_nodes.TryGetValue(iid, out cn)) { return cn; }
 

com.unity.formats.alembic/Runtime/Scripts/Importer/AlembicStream.cs

@@ -222,7 +222,11 @@ void ClearMotionVectors(AlembicTreeNode node)
         public bool AbcLoad(bool createMissingNodes, bool serializeMesh)
         {
             m_time = 0.0f;
+#if UNITY_6000_4_OR_NEWER
+            m_context = new SafeContext(aiContext.Create((int)EntityId.ToULong(m_abcTreeRoot.gameObject.GetEntityId())));
+#else
             m_context = new SafeContext(aiContext.Create(m_abcTreeRoot.gameObject.GetInstanceID()));
+#endif
 
             var settings = m_streamDesc.Settings;
             m_config.swapHandedness = settings.SwapHandedness;