ParticleEmitter2.h

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/*************************************************************************
> File Name: ParticleEmitter2.h
> Project Name: CubbyFlow
> Author: Chan-Ho Chris Ohk
> Purpose: Abstract base class for 2-D particle emitter.
> Created Time: 2017/05/10
> Copyright (c) 2018, Chan-Ho Chris Ohk
*************************************************************************/
#ifndef CUBBYFLOW_PARTICLE_EMITTER2_H
#define CUBBYFLOW_PARTICLE_EMITTER2_H

#include <Core/Particle/ParticleSystemData2.h>

namespace CubbyFlow
{
    class ParticleEmitter2
    {
    public:
        using OnBeginUpdateCallback = std::function<void(ParticleEmitter2*, double, double)>;

        ParticleEmitter2();

        virtual ~ParticleEmitter2();

        void Update(double currentTimeInSeconds, double timeIntervalInSeconds);

        const ParticleSystemData2Ptr& GetTarget() const;

        void SetTarget(const ParticleSystemData2Ptr& particles);

        void SetOnBeginUpdateCallback(const OnBeginUpdateCallback& callback);

    protected:
        virtual void OnSetTarget(const ParticleSystemData2Ptr& particles);

        virtual void OnUpdate(double currentTimeInSeconds, double timeIntervalInSeconds) = 0;

    private:
        ParticleSystemData2Ptr m_particles;
        OnBeginUpdateCallback m_onBeginUpdateCallback;
    };

    using ParticleEmitter2Ptr = std::shared_ptr<ParticleEmitter2>;
}

#endif