axmol/extensions/3dparticle/ParticleUniverse/CCPUParticleSystem3D.h

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 Copyright (c) 2014 Chukong Technologies Inc.
 
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#ifndef __CC_PU_PARTICLE_SYSTEM_3D_H__
#define __CC_PU_PARTICLE_SYSTEM_3D_H__

#include "2d/CCNode.h"
#include "base/CCProtocols.h"
#include "math/CCMath.h"
#include "3dparticle/CCParticleSystem3D.h"
#include <vector>
#include <map>

NS_CC_BEGIN

/**
 * 3d particle system
 */
class PUParticle3DEmitter;
class PUParticle3DAffector;
class Particle3DRender;

struct CC_DLL PUParticle3D : public Particle3D
{
    static float DEFAULT_TTL;
    static float DEFAULT_MASS;

    PUParticle3D();
        /** Enumeration which lists a number of reserved event flags. Although custom flags can be used to
        indicate that a certain condition occurs, the first number of flags may not be used as custom flags.
    */
    enum ReservedParticleEventFlags
    {
        PEF_EXPIRED = 1<<0,
        PEF_EMITTED = 1<<1,
        PEF_COLLIDED = 1<<2
    };

    PUParticle3DEmitter* parentEmitter;

    // Values that are assigned as soon as the particle is emitted (non-transformed)
    Vec3 positionInWorld;
    Vec3 originalPosition;
    Vec3 latestPosition;
    // Direction (and speed)
    Vec3 direction;
    Vec3 originalDirection;
    float originalDirectionLength; // Length of the direction that has been set
    float originalVelocity;
    float originalScaledDirectionLength; // Length of the direction after multiplication with the velocity

    /** The rotation axis is used in combination with orientation. Because the rotation axis is part
        of the particle itself, it can be changed independently. */
    Vec3 rotationAxis;
    /** Current and original colour */

    Vec4 originalColor;

    /** The zRotationSpeed is used in combination with zRotation and defines tha actual rotationspeed
        in 2D. */
    float zRotationSpeed; //radian

    Quaternion orientationInWorld;
    /*@remarks
        The orientation of the particle is only visible if the Particle Renderer - such as the Box renderer - 
        supports orientation.
    */
    Quaternion originalOrientation;


    /** The rotation is used in combination with orientation. Because the rotation speed is part
        of the particle itself, it can be changed independently. */
    float rotationSpeed;

    /** Radius of the particle, to be used for inter-particle collision and such.
    */
    float radius;

    float calculateVelocity() const;

    /** Set own dimensions
    */
    void setOwnDimensions(float newWidth, float newHeight, float newDepth);
    void calculateBoundingSphereRadius();

    void initForEmission();

    /** Does this particle have it's own dimensions? */
    bool ownDimensions;

        /** Sets the event flags.
    */
    inline void setEventFlags(unsigned int flags) {eventFlags = flags;}

    /** As setEventFlags, except the flags passed as parameters are appended to the
        existing flags on this object.
    */
    inline void addEventFlags(unsigned int flags) {eventFlags |= flags;}
            
    /** The flags passed as parameters are removed from the existing flags.
    */
    inline void removeEventFlags(unsigned int flags) {eventFlags &= ~flags;}
        
    /** Return the event flags.
    */
    inline unsigned int getEventFlags() const {return eventFlags;}

    /** Determines whether it has certain flags set.
    */
    inline bool hasEventFlags(unsigned int flags) const {return (eventFlags & flags) != 0;}

    unsigned int eventFlags;

    bool isFreezed(void) const
    {
        return freezed;
    }
    //-----------------------------------------------------------------------
    void setFreezed(bool fzd)
    {
        freezed = fzd;
    }
    bool freezed;

    // Time to live, number of seconds left of particles natural life
    float timeToLive;

    // Total Time to live, number of seconds of particles natural life
    float totalTimeToLive;

    // The timeFraction is calculated every update. It is used in other observers, affectors, etc. so it is
    // better to calculate it once at the Particle level.
    float timeFraction;

        /*  Mass of a particle.
    @remarks
        In case of simulations where mass of a particle is needed (i.e. exploding particles of different
        mass) this attribute can be used.
    */
    float mass;

    /** Animation attributes
    */
    float textureAnimationTimeStep;
    float textureAnimationTimeStepCount;
    unsigned short textureCoordsCurrent;
    bool textureAnimationDirectionUp;

    float depthInView;//depth in camera view
    float zRotation; //zRotation is used to rotate the particle in 2D (around the Z-axis)   (radian)
    float widthInWorld;
    float heightInWorld;
    float depthInWorld;
};

class CC_DLL PUParticleSystem3D : public ParticleSystem3D
{
public:

    static const float DEFAULT_WIDTH;
    static const float DEFAULT_HEIGHT;
    static const float DEFAULT_DEPTH;
    static const unsigned short DEFAULT_PARTICLE_QUOTA;
    static const float DEFAULT_MAX_VELOCITY;

    static PUParticleSystem3D* create();
    static PUParticleSystem3D* create(const std::string &filePath);
    static PUParticleSystem3D* create(const std::string &filePath, const std::string &materialPath);
    
    virtual void update(float delta) override;
    
    /**
     * particle system play control
     */
    virtual void startParticle() override;
    
    /**
     * stop particle
     */
    virtual void stopParticle() override;
    
    /**
     * pause particle
     */
    virtual void pauseParticle() override;
    
    /**
     * resume particle
     */
    virtual void resumeParticle() override;

    /** Returns the velocity scale, defined in the particle system, but passed to the technique for convenience.
    */
    float getParticleSystemScaleVelocity() const;

    void setParticleSystemScaleVelocity(float scaleVelocity) { _particleSystemScaleVelocity = scaleVelocity; }

    /** If the orientation of the particle system has been changed since the last update, the passed vector
        is rotated accordingly.
    */
    void rotationOffset(Vec3& pos);

    inline float getTimeElapsedSinceStart(void) const {return _timeElapsedSinceStart;};

    /** 
    */
    const float getDefaultWidth(void) const;
    void setDefaultWidth(const float width);

    /** 
    */
    const float getDefaultHeight(void) const;
    void setDefaultHeight(const float height);

    /** 
    */
    const float getDefaultDepth(void) const;
    void setDefaultDepth(const float depth);

    Vec3 getDerivedPosition();
    Quaternion getDerivedOrientation();
    Vec3 getDerivedScale();

    /** Return the maximum velocity a particle can have, even if the velocity of the particle has been set higher (either by 
        initialisation of the particle or by means of an affector).
    */
    float getMaxVelocity() const;

    /** Set the maximum velocity a particle can have.
    */
    void setMaxVelocity(float maxVelocity);

    void setMaterialName(const std::string &name) { _matName = name; };
    const std::string getMaterialName() const { return _matName; };

        /**
     * add particle affector
     */
    void addEmitter(PUParticle3DEmitter* emitter);
    
    virtual int getAliveParticleCnt() const override;

CC_CONSTRUCTOR_ACCESS:
    PUParticleSystem3D();
    virtual ~PUParticleSystem3D();

protected:

    void prepared();
    void unPrepared();
    void preUpdator(float elapsedTime);
    void updator(float elapsedTime);
    void postUpdator(float elapsedTime);
    void emitParticles(float elapsedTime);
    
    inline bool isExpired(PUParticle3D* particle, float timeElapsed);

    bool initSystem(const std::string &filePath);
    static void convertToUnixStylePath(std::string &path);

protected:

    std::vector<PUParticle3DEmitter*> _emitters;

    bool _prepared;

    float _particleSystemScaleVelocity;
    float _timeElapsedSinceStart;
    /** Rotation offset between 2 updates.
    */
    Quaternion _rotationOffset;

    /** The rotation centre.
    */
    Vec3 _rotationCentre;
    

    /** Default width of each visual particle.
    */
    float _defaultWidth;

    /** Default height of each visual particle.
    */
    float _defaultHeight;

    /** Default depth of each visual particle.
    */
    float _defaultDepth;
    
        /** Attributes that limit the velocity of the particles in this technique.
    */
    float _maxVelocity;
    bool _maxVelocitySet;

    std::string _matName;
};

NS_CC_END

#endif