Particles/Emitter.hpp

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//
// Thor C++ Library
// Copyright (c) 2011-2012 Jan Haller
// 
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
// 
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
// 
// 1. The origin of this software must not be misrepresented; you must not
//    claim that you wrote the original software. If you use this software
//    in a product, an acknowledgment in the product documentation would be
//    appreciated but is not required.
// 
// 2. Altered source versions must be plainly marked as such, and must not be
//    misrepresented as being the original software.
// 
// 3. This notice may not be removed or altered from any source distribution.
//


#ifndef THOR_EMITTER_HPP
#define THOR_EMITTER_HPP

#include <Thor/Particles/ParticleInterfaces.hpp>
#include <Thor/Particles/Particle.hpp>
#include <Thor/Vectors/PolarVector.hpp>
#include <Thor/Geometry/Zone.hpp>
#include <Thor/Config.hpp>

#include <SFML/System/Time.hpp>
#include <SFML/System/Vector2.hpp>
#include <SFML/Graphics/Color.hpp>


namespace thor
{


class THOR_API DirectionalEmitter : public Emitter
{
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public types
    public:
        typedef std::tr1::shared_ptr<DirectionalEmitter> Ptr;

        
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public static member functions
    public:
        static Ptr                  Create(float particlesPerSecond, sf::Time particleLifetime);

        
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public member functions
    public:
                                    DirectionalEmitter(float particlesPerSecond, sf::Time particleLifetime);

        virtual void                Emit(Adder& system, sf::Time dt);
        
        void                        SetParticleVelocity(sf::Vector2f velocity);

        sf::Vector2f                GetParticleVelocity() const;

        void                        SetEmissionAngle(float emissionAngle);

        float                       GetEmissionAngle() const;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Private variables
    private:
        float                       mEmissionAngle;
        sf::Vector2f                mParticleVelocity;
};


class THOR_API TargetEmitter : public Emitter
{
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public types
    public:
        typedef std::tr1::shared_ptr<TargetEmitter> Ptr;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Public static member functions
    public:
        static Ptr                  Create(float particlesPerSecond, sf::Time particleLifetime);

        
    // ---------------------------------------------------------------------------------------------------------------------------
    // Public member functions
    public:
                                    TargetEmitter(float particlesPerSecond, sf::Time particleLifetime);

        virtual void                Emit(Adder& system, sf::Time dt);

        void                        SetTargetZone(Emitter::ZonePtr zone);

        Zone&                       GetTargetZone();

        const Zone&                 GetTargetZone() const;

        void                        SetParticleSpeed(float speed);

        float                       GetParticleSpeed() const;


    // ---------------------------------------------------------------------------------------------------------------------------
    // Private variables
    private:
        CopiedPtr<Zone, VirtualClone> mTargetZone;
        float                       mParticleSpeed;
};


} // namespace thor

#endif // THOR_EMITTER_HPP