1 files changed, 66 insertions, 0 deletions
diff --git a/source/core/StarNetElementGroup.hpp b/source/core/StarNetElementGroup.hpp
new file mode 100644
index 0000000..d583818
--- /dev/null
+++ b/source/core/StarNetElementGroup.hpp
@@ -0,0 +1,66 @@
+#ifndef STAR_NET_ELEMENT_GROUP_HPP
+#define STAR_NET_ELEMENT_GROUP_HPP
+
+#include "StarSet.hpp"
+#include "StarNetElement.hpp"
+#include "StarDataStreamDevices.hpp"
+
+namespace Star {
+
+// A static group of NetElements that itself is a NetElement and serializes
+// changes based on the order in which elements are added.  All participants
+// must externally add elements of the correct type in the correct order.
+class NetElementGroup : public NetElement {
+public:
+  NetElementGroup() = default;
+
+  NetElementGroup(NetElementGroup const&) = delete;
+  NetElementGroup& operator=(NetElementGroup const&) = delete;
+
+  // Add an element to the group.
+  void addNetElement(NetElement* element, bool propagateInterpolation = true);
+
+  // Removes all previously added elements
+  void clearNetElements();
+
+  void initNetVersion(NetElementVersion const* version = nullptr) override;
+
+  void netStore(DataStream& ds) const override;
+  void netLoad(DataStream& ds) override;
+
+  void enableNetInterpolation(float extrapolationHint = 0.0f) override;
+  void disableNetInterpolation() override;
+  void tickNetInterpolation(float dt) override;
+
+  bool writeNetDelta(DataStream& ds, uint64_t fromVersion) const override;
+  void readNetDelta(DataStream& ds, float interpolationTime = 0.0f) override;
+  void blankNetDelta(float interpolationTime) override;
+
+  NetElementVersion const* netVersion() const;
+  bool netInterpolationEnabled() const;
+  float netExtrapolationHint() const;
+
+private:
+  List<pair<NetElement*, bool>> m_elements;
+  NetElementVersion const* m_version = nullptr;
+  bool m_interpolationEnabled = false;
+  float m_extrapolationHint = 0.0f;
+
+  mutable DataStreamBuffer m_buffer;
+};
+
+inline NetElementVersion const* NetElementGroup::netVersion() const {
+  return m_version;
+}
+
+inline bool NetElementGroup::netInterpolationEnabled() const {
+  return m_interpolationEnabled;
+}
+
+inline float NetElementGroup::netExtrapolationHint() const {
+  return m_extrapolationHint;
+}
+
+}
+
+#endif