charcoal/OpenGLEngine/Scene.h

#pragma once

#include "deps.h"

#include <time.h>

#include "Application.h"

namespace charcoal
{
	class Scene
	{
	public:
		Scene(Application& application)
			: m_screen_size(application.get_screen_size()),
			m_input_manager(application.get_input_manager()),
			m_fps(application.get_fps())
		{};
		virtual ~Scene() {};

		// Called when the scene is ready to be initialized
		virtual void init() = 0;

		// Called when the scene is going to be used
		// Should allocate all graphics memory.
		virtual void use() = 0;

		// Called when the scene is no longer going to be used
		// Should release all graphics memory
		virtual void unuse() = 0;

		// Called when the frame is being updated
		virtual void update(float delta_time, clock_t clock) = 0;

		// Called before the scene is rendered.
		// Intended to prepare objects for rendering (generally by calling their prerender function)
		virtual void prerender() = 0;

		// Called when the frame is being rendered
		virtual void render() = 0;
	protected:
		const ivec2& m_screen_size;
		const GLFWInputManager& m_input_manager;
		const FPS& m_fps;
	};
}