Refactor ModelGraph -> OpenSim::Model code into ModelGraphOpenSimBrid…

…ge hpp+cpp files (#802)

src/OpenSimCreator/CMakeLists.txt

@@ -70,11 +70,14 @@ add_library(OpenSimCreator STATIC
     ModelGraph/JointEl.hpp
     ModelGraph/MeshEl.cpp
     ModelGraph/MeshEl.hpp
+    ModelGraph/ModelCreationFlags.hpp
     ModelGraph/ModelGraph.hpp
     ModelGraph/ModelGraphHelpers.cpp
     ModelGraph/ModelGraphHelpers.hpp
     ModelGraph/ModelGraphIDs.cpp
     ModelGraph/ModelGraphIDs.hpp
+    ModelGraph/ModelGraphOpenSimBridge.cpp
+    ModelGraph/ModelGraphOpenSimBridge.hpp
     ModelGraph/ModelGraphStrings.hpp
     ModelGraph/SceneEl.cpp
     ModelGraph/SceneEl.hpp

src/OpenSimCreator/ModelGraph/ModelCreationFlags.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include <oscar/Shims/Cpp23/utility.hpp>
+
+namespace osc
+{
+    // user-editable flags that affect how the model is created from the model graph
+    enum class ModelCreationFlags {
+        None,
+        ExportStationsAsMarkers,
+    };
+
+    constexpr bool operator&(ModelCreationFlags const& lhs, ModelCreationFlags const& rhs)
+    {
+        return (osc::to_underlying(lhs) & osc::to_underlying(rhs)) != 0;
+    }
+
+    constexpr ModelCreationFlags operator+(ModelCreationFlags const& lhs, ModelCreationFlags const& rhs)
+    {
+        return static_cast<ModelCreationFlags>(osc::to_underlying(lhs) | osc::to_underlying(rhs));
+    }
+
+    constexpr ModelCreationFlags operator-(ModelCreationFlags const& lhs, ModelCreationFlags const& rhs)
+    {
+        return static_cast<ModelCreationFlags>(osc::to_underlying(lhs) & ~osc::to_underlying(rhs));
+    }
+}