Merge pull request #7 from hatkirby/es-rewrite

The ECS rewrite exceeds the original branch in functionality, so it is time to merge it in.

1 files changed, 68 insertions, 0 deletions

@@ -0,0 +1,68 @@
+#ifndef SYSTEM_MANAGER_H_544E6056
+#define SYSTEM_MANAGER_H_544E6056
+
+#include <list>
+#include <memory>
+#include <map>
+#include <typeindex>
+#include <stdexcept>
+#include "system.h"
+
+class SystemManager {
+private:
+
+  std::list<std::unique_ptr<System>> loop;
+  std::map<std::type_index, System*> systems;
+
+public:
+
+  template <class T, class... Args>
+  void emplaceSystem(Game& game, Args&&... args)
+  {
+    std::unique_ptr<T> ptr(new T(game, std::forward<Args>(args)...));
+    std::type_index systemType = typeid(T);
+
+    systems[systemType] = ptr.get();
+    loop.push_back(std::move(ptr));
+  }
+
+  template <class T>
+  T& getSystem()
+  {
+    std::type_index systemType = typeid(T);
+
+    if (!systems.count(systemType))
+    {
+      throw std::invalid_argument("Cannot get non-existent system");
+    }
+
+    return *dynamic_cast<T*>(systems[systemType]);
+  }
+
+  void tick(double dt)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->tick(dt);
+    }
+  }
+
+  virtual void render(Texture& texture)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->render(texture);
+    }
+  }
+
+  virtual void input(int key, int action)
+  {
+    for (std::unique_ptr<System>& sys : loop)
+    {
+      sys->input(key, action);
+    }
+  }
+
+};
+
+#endif /* end of include guard: SYSTEM_MANAGER_H_544E6056 */