Make it possible to retrieve components and systems of a particular type

[libs/game.git] / source / game / stage.h

diff --git a/source/game/stage.h b/source/game/stage.h
index 80e7a4b72c25e51141d43718c6bed196ffdf712c..d7793e22f60ec21fd52acab1b8af9aafbe2f4d94 100644 (file)
--- a/source/game/stage.h
+++ b/source/game/stage.h
@@ -45,22 +45,34 @@ public:
 
        const std::vector<std::unique_ptr<System>> &get_systems() const { return systems; }
 
+       template<typename T>
+       T *get_system() const;
+
        void tick(Time::TimeDelta);
 };
 
 template<typename T, typename F>
-void Stage::iterate_objects(const F &func)
+inline void Stage::iterate_objects(const F &func)
 {
        pools.get_pool<T>().iterate_objects(func);
 }
 
 template<typename T, typename... Args>
-T &Stage::add_system(Args &&... args)
+inline T &Stage::add_system(Args &&... args)
 {
        systems.emplace_back(std::make_unique<T>(*this, std::forward<Args>(args)...));
        return static_cast<T &>(*systems.back());
 }
 
+template<typename T>
+inline T *Stage::get_system() const
+{
+       for(const auto &s: systems)
+               if(T *ts = dynamic_cast<T *>(s.get()))
+                       return ts;
+       return nullptr;
+}
+
 } // namespace Msp::Game
 
 #endif