//-------------------------------------------------------------------------------------
//
// JGE++ is a hardware accelerated 2D game SDK for PSP/Windows.
//
// Licensed under the BSD license, see LICENSE in JGE root for details.
// 
// Copyright (c) 2007 James Hui (a.k.a. Dr.Watson) <jhkhui@gmail.com>
// 
//-------------------------------------------------------------------------------------

#ifndef __PARTICLE_SYSTEM_H__
#define __PARTICLE_SYSTEM_H__

#include <stdlib.h>
#include <list>
#include <vector>


#include "JGE.h"

#include "JParticle.h"


class JParticleEffect;
class JParticleEmitter;

using namespace std;


//////////////////////////////////////////////////////////////////////////
/// The particle system of JGE++ is built on a key frame concept with
/// multiple emitters for each effect. It's inspired by the particle system
/// of Torque Game Builder. At each key frame, you can specify the value 
/// of the changeable states of the particle. This gives you lots of
/// control over the particles and making it possible to create
/// almost all of the spectacular effects out of your imagination.
/// 
//////////////////////////////////////////////////////////////////////////
class JParticleSystem
{
public:

	//////////////////////////////////////////////////////////////////////////
	/// Constructor.
	///
	//////////////////////////////////////////////////////////////////////////
	JParticleSystem();

	~JParticleSystem();


	//////////////////////////////////////////////////////////////////////////
	/// Update all active effects.
	/// 
	/// @param dt - Delta time since last update (in second).
	/// 
	//////////////////////////////////////////////////////////////////////////
	void Update(float dt);

	//////////////////////////////////////////////////////////////////////////
	/// Render all active effects.
	/// 
	//////////////////////////////////////////////////////////////////////////
	void Render();

	//////////////////////////////////////////////////////////////////////////
	/// Start an effect.
	/// 
	/// @param effect - Effect to start playing.
	/// 
	//////////////////////////////////////////////////////////////////////////
	void StartEffect(JParticleEffect* effect);

	//////////////////////////////////////////////////////////////////////////
	/// Stop all effects.
	/// 
	//////////////////////////////////////////////////////////////////////////
	void StopAllEffects();

	//////////////////////////////////////////////////////////////////////////
	/// Delete all effects from memory.
	/// 
	//////////////////////////////////////////////////////////////////////////
	void ClearAll();

	//////////////////////////////////////////////////////////////////////////
	/// Check if the particle system is active or not.
	/// 
	/// @return True if active.
	/// 
	//////////////////////////////////////////////////////////////////////////
	bool IsActive();

	//////////////////////////////////////////////////////////////////////////
	/// Set active flag.
	/// 
	/// @param flag - Active flag.
	/// 
	//////////////////////////////////////////////////////////////////////////
	void SetActive(bool flag);


private:

	bool mActive;

	list<JParticleEffect*> mEffects;


};



#endif