dreamcast-opengl/engine.hh

#ifndef ENGINE_HH
#define ENGINE_HH

#include <kos.h>
#include <sys/time.h>

#include <functional>

class Engine {
   protected:
	static constexpr float microSecond = 0.000001f;

	float angle = 0;
	float deltaTime = 1.0 / 60.0;
	float speed = 5.0f;

	bool thirtyfps;
	unsigned int buttonsPressed;

	virtual void initScreen();
	void printSystemInformation();
	virtual void gameLoop(){};
	void pressButton(cont_state_t* controller_state, int button,
					 std::function<void()> callback);
	void glVertex3fNormalized(float x, float y, float z);

   private:
	template <typename T>
	void deltaTimeLoop(T&& callback, struct timeval& beginningOfFrame,
					   struct timeval& endOfFrame);

   public:
	void initializeEngine();
	void initializeGameLoop();
};
#endif