axmol/extensions/Particle3D/PU/PUDoScaleEventHandler.h

/****************************************************************************
 Copyright (C) 2013 Henry van Merode. All rights reserved.
 Copyright (c) 2015-2016 Chukong Technologies Inc.
 Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

 https://axmolengine.github.io/

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#ifndef __AX_PU_PARTICLE_3D_DO_SCALE_EVENT_HANDLER_H__
#define __AX_PU_PARTICLE_3D_DO_SCALE_EVENT_HANDLER_H__

#include "base/Ref.h"
#include "math/Math.h"
#include "extensions/Particle3D/PU/PUEventHandler.h"
#include <vector>
#include <string>

NS_AX_BEGIN

struct PUParticle3D;
class PUParticleSystem3D;

class AX_EX_DLL PUDoScaleEventHandler : public PUEventHandler
{
public:
    enum ScaleType
    {
        ST_TIME_TO_LIVE,
        ST_VELOCITY
    };

    // Constants
    static const ScaleType DEFAULT_SCALE_TYPE;
    static const float DEFAULT_SCALE_FRACTION;

    static PUDoScaleEventHandler* create();

    /** Returns the scale type
     */
    const ScaleType& getScaleType() const;

    /** Set the scale type. This scale type identifies to which attribute the scale factor is applied.
     */
    void setScaleType(const ScaleType& scaleType);

    /** Returns the scale fraction
     */
    float getScaleFraction() const;

    /** Set the scale fraction. This scale fraction value is used to scale different attributes if the
        event handler is called.
    */
    void setScaleFraction(const float scaleFraction);

    /**
     */
    virtual void handle(PUParticleSystem3D* particleSystem, PUParticle3D* particle, float timeElapsed) override;

    virtual void copyAttributesTo(PUEventHandler* eventHandler) override;

    PUDoScaleEventHandler();
    virtual ~PUDoScaleEventHandler(){};

protected:
    float _scaleFraction;
    ScaleType _scaleType;
};

NS_AX_END

#endif