/****************************************************************************
 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/

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ****************************************************************************/

#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