India/cocos2d-x/extensions/Particle3D/PU/CCPULineEmitter.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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 The above copyright notice and this permission notice shall be included in
 all copies or substantial portions of the Software.
 
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#ifndef __CC_PU_PARTICLE_3D_LINE_EMITTER_H__
#define __CC_PU_PARTICLE_3D_LINE_EMITTER_H__

#include "extensions/Particle3D/PU/CCPUEmitter.h"

NS_CC_BEGIN

struct PUParticle3D;
class  CC_DLL PULineEmitter : public PUEmitter
{
public:
    // Constants
    static const Vec3 DEFAULT_END;
    static const float DEFAULT_MIN_INCREMENT;
    static const float DEFAULT_MAX_INCREMENT;
    static const float DEFAULT_MAX_DEVIATION;

    static PULineEmitter* create();
    /** 
    */
    virtual void notifyStart (void) override;

    /** Override the default implementation, to allow that no particles are emitted if there
        is an incremental emission of particles (along a path), and the end of the line has
        been reached.
    */
    virtual unsigned short calculateRequestedParticles(float timeElapsed) override;

    /** 
    */
    float getMaxDeviation(void) const;
    void setMaxDeviation(float maxDeviation);

    /** 
    */
    float getMaxIncrement(void) const;
    void setMaxIncrement(float maxIncrement);
            
    /** 
    */
    float getMinIncrement(void) const;
    void setMinIncrement(float minIncrement);
            
    /** Get the end vector. This is the vector that defines the end of the line (in local space).
    */
    const Vec3& getEnd(void) const;

    /** Set the end vector.
    */
    void setEnd(const Vec3& end);

    /** 
    */
    virtual void notifyRescaled(const Vec3& scale) override;

    /** 
    */
    virtual void initParticlePosition(PUParticle3D* particle) override;

    /** 
    */
    virtual void initParticleDirection(PUParticle3D* particle) override;

    virtual PULineEmitter* clone() override;
    virtual void copyAttributesTo (PUEmitter* emitter) override;

CC_CONSTRUCTOR_ACCESS:
    PULineEmitter(void);
    virtual ~PULineEmitter(void) {};

protected:

    Vec3 _end; // End point of the line (startpoint is determined by means of position)
    Vec3 _perpendicular; // Generated unit vector perpendicular on the line
    float _maxDeviation;	// Determines how far from the line a particle is emitted.
    // This attribute defines the maximum value.
    float _minIncrement;	// Defines the minimum increment value.
    float _maxIncrement;	// If > 0, it defines the maximum (random) increment value that is
    // taken on the line traject. If not set, there is no particular 
    // order in particle generation.
    float _increment; // Defines the trajectory path along the line in terms of increments
    float _length; // The length of the line
    bool _incrementsLeft;	// Indicates whether there are more increments on the path towards the end
    // of the line.
    bool _first; // True when the first particle is emitted (only for generating particles incremental)

    // Internal scaled values
    Vec3 _scaledEnd;
    float _scaledMaxDeviation;
    float _scaledMinIncrement;
    float _scaledMaxIncrement;
    float _scaledLength;
};
NS_CC_END

#endif