global.set has been implemented, but not diff xmit for globals

luprex/cpp/core/world.hpp

@@ -379,7 +379,9 @@ public:
     //
     void tangible_set_string(int64_t id, const eng::string &path, const eng::string &value);
 
-    // Copy a lua global variable into the tangible's database.
+    // Copy a from the lua global environment into the tangible's database.
+    //
+    // This is for unit testing.
     //
     void tangible_copy_global(int64_t id, const eng::string &path, const eng::string &global);
 
@@ -516,6 +518,13 @@ private:
     SourceDB source_db_;
     PlaneMap plane_map_;
 
+    // Lua Globals
+    //
+    int64_t next_gvar_assign_;
+    eng::map<eng::string, int64_t> gvar_to_assign_;
+    eng::map<eng::string, eng::string> gvar_to_serial_;
+    eng::map<int64_t, eng::string> assign_to_gvar_;
+
     // Tangibles table.
     //
     eng::unordered_map<int64_t, UniqueTangible> tangibles_;
@@ -551,6 +560,7 @@ private:
     std::unique_ptr<eng::ostringstream> lthread_prints_;
 
     friend class Tangible;  
+    friend void global_set(LuaStack &LS0, const eng::string &gvar, LuaSlot value); 
     friend int lfn_tangible_animate(lua_State *L);
     friend int lfn_tangible_build(lua_State *L);
     friend int lfn_tangible_redirect(lua_State *L);
@@ -566,6 +576,7 @@ private:
     friend int lfn_wait(lua_State *L);
     friend int lfn_nopredict(lua_State *L);
     friend int lfn_http_request(lua_State *L, const char *method);
+    friend int lfn_global_set(lua_State *L);
 };
 
 using UniqueWorld = std::unique_ptr<World>;