axmol/extensions/Particle3D/PU/CCPUDoScaleEventHandler.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.
 
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#ifndef __CC_PU_PARTICLE_3D_DO_SCALE_EVENT_HANDLER_H__
#define __CC_PU_PARTICLE_3D_DO_SCALE_EVENT_HANDLER_H__

#include "base/CCRef.h"
#include "math/CCMath.h"
#include "extensions/Particle3D/PU/CCPUEventHandler.h"
#include <vector>
#include <string>

NS_CC_BEGIN

struct PUParticle3D;
class PUParticleSystem3D;

class CC_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;

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

protected:
    float _scaleFraction;
    ScaleType _scaleType;
};

NS_CC_END

#endif