Add invocation queue to DrivenEngine, use it for lua source

luprex/cpp/core/lpxclient.cpp

@@ -35,6 +35,9 @@ public:
 
         // Clear the unack command queue.
         unack_.clear();
+
+        // Export stuff to the graphics engine.
+        set_visible_world_and_actor(world_.get(), actor_id_);
     }
 
 
@@ -93,11 +96,6 @@ public:
         inv.serialize(sb);
     }
 
-    void send_lua_source(std::string_view sourcepack) {
-        Invocation inv(Invocation::KIND_LUA_SOURCE, actor_id_, actor_id_, sourcepack);
-        send_invocation(inv);
-    }
-
     void do_luainvoke_command(const StringVec &words) {
         send_invocation(Invocation(Invocation::KIND_LUA, actor_id_, actor_id_, words[1]));
     }
@@ -176,6 +174,7 @@ public:
         stdostream() << "Actor ID changing: " << actor_id << std::endl;
         print_channeler_.reset();
         actor_id_ = actor_id;
+        set_visible_world_and_actor(world_.get(), actor_id_);
     }
 
     void receive_ack_from_server(StreamBuffer *sb) {
@@ -230,12 +229,10 @@ public:
     }
 
     virtual void event_update() {
-        // Check for lua source code.  If this returns non-null,
-        // it is because somebody typed CPL.
-        eng::string lua_source_pack = get_lua_source_pack();
-        if (!lua_source_pack.empty()) {
-            send_lua_source(lua_source_pack);
-            lua_source_pack.clear();
+        // Send invocations.  We execute these using predictive execution.
+        eng::vector<UniqueInvocation> invocations = get_queued_invocations();
+        for (const UniqueInvocation &inv : invocations) {
+            send_invocation(*inv);
         }
 
         // Check for keyboard input on stdin.