ylib/3rdparty/cocos2dx/include/cocos/2d/CCParticleSystem.cpp

/****************************************************************************
Copyright (c) 2008-2010 Ricardo Quesada
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2011      Zynga Inc.
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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// ideas taken from:
//     . The ocean spray in your face [Jeff Lander]
//        http://www.double.co.nz/dust/col0798.pdf
//     . Building an Advanced Particle System [John van der Burg]
//        http://www.gamasutra.com/features/20000623/vanderburg_01.htm
//   . LOVE game engine
//        http://love2d.org/
//
//
// Radius mode support, from 71 squared
//        http://particledesigner.71squared.com/
//
// IMPORTANT: Particle Designer is supported by cocos2d, but
// 'Radius Mode' in Particle Designer uses a fixed emit rate of 30 hz. Since that can't be guaranteed in cocos2d,
//  cocos2d uses a another approach, but the results are almost identical. 
//

#include "2d/CCParticleSystem.h"

#include <string>

#include "2d/CCParticleBatchNode.h"
#include "renderer/CCTextureAtlas.h"
#include "base/base64.h"
#include "base/ZipUtils.h"
#include "base/CCDirector.h"
#include "base/CCProfiling.h"
#include "base/ccUTF8.h"
#include "base/ccUtils.h"
#include "renderer/CCTextureCache.h"
#include "platform/CCFileUtils.h"

using namespace std;

NS_CC_BEGIN

// ideas taken from:
//     . The ocean spray in your face [Jeff Lander]
//        http://www.double.co.nz/dust/col0798.pdf
//     . Building an Advanced Particle System [John van der Burg]
//        http://www.gamasutra.com/features/20000623/vanderburg_01.htm
//   . LOVE game engine
//        http://love2d.org/
//
//
// Radius mode support, from 71 squared
//        http://particledesigner.71squared.com/
//
// IMPORTANT: Particle Designer is supported by cocos2d, but
// 'Radius Mode' in Particle Designer uses a fixed emit rate of 30 hz. Since that can't be guaranteed in cocos2d,
//  cocos2d uses a another approach, but the results are almost identical. 
//


inline void normalize_point(float x, float y, particle_point* out)
{
    float n = x * x + y * y;
    // Already normalized.
    if (n == 1.0f)
        return;
    
    n = sqrt(n);
    // Too close to zero.
    if (n < MATH_TOLERANCE)
        return;
    
    n = 1.0f / n;
    out->x = x * n;
    out->y = y * n;
}

/**
 A more effect random number getter function, get from ejoy2d.
 */
inline static float RANDOM_M11(unsigned int *seed) {
    *seed = *seed * 134775813 + 1;
    union {
        uint32_t d;                                     
        float f;
    } u;
    u.d = (((uint32_t)(*seed) & 0x7fff) << 8) | 0x40000000;
    return u.f - 3.0f;
}

ParticleData::ParticleData()
{
    memset(this, 0, sizeof(ParticleData));
}

bool ParticleData::init(int count)
{
    maxCount = count;
    
    posx= (float*)malloc(count * sizeof(float));
    posy= (float*)malloc(count * sizeof(float));
    startPosX= (float*)malloc(count * sizeof(float));
    startPosY= (float*)malloc(count * sizeof(float));
    colorR= (float*)malloc(count * sizeof(float));
    colorG= (float*)malloc(count * sizeof(float));
    colorB= (float*)malloc(count * sizeof(float));
    colorA= (float*)malloc(count * sizeof(float));
    deltaColorR= (float*)malloc(count * sizeof(float));
    deltaColorG= (float*)malloc(count * sizeof(float));
    deltaColorB= (float*)malloc(count * sizeof(float));
    deltaColorA= (float*)malloc(count * sizeof(float));
    size= (float*)malloc(count * sizeof(float));
    deltaSize= (float*)malloc(count * sizeof(float));
    rotation= (float*)malloc(count * sizeof(float));
    deltaRotation= (float*)malloc(count * sizeof(float));
    timeToLive= (float*)malloc(count * sizeof(float));
    atlasIndex= (unsigned int*)malloc(count * sizeof(unsigned int));
    
    modeA.dirX= (float*)malloc(count * sizeof(float));
    modeA.dirY= (float*)malloc(count * sizeof(float));
    modeA.radialAccel= (float*)malloc(count * sizeof(float));
    modeA.tangentialAccel= (float*)malloc(count * sizeof(float));
    
    modeB.angle= (float*)malloc(count * sizeof(float));
    modeB.degreesPerSecond= (float*)malloc(count * sizeof(float));
    modeB.deltaRadius= (float*)malloc(count * sizeof(float));
    modeB.radius= (float*)malloc(count * sizeof(float));
    
    return posx && posy && startPosY && startPosX && colorR && colorG && colorB && colorA &&
    deltaColorR && deltaColorG && deltaColorB && deltaColorA && size && deltaSize &&
    rotation && deltaRotation && timeToLive && atlasIndex && modeA.dirX && modeA.dirY &&
    modeA.radialAccel && modeA.tangentialAccel && modeB.angle && modeB.degreesPerSecond &&
    modeB.deltaRadius && modeB.radius;
}

void ParticleData::release()
{
    CC_SAFE_FREE(posx);
    CC_SAFE_FREE(posy);
    CC_SAFE_FREE(startPosX);
    CC_SAFE_FREE(startPosY);
    CC_SAFE_FREE(colorR);
    CC_SAFE_FREE(colorG);
    CC_SAFE_FREE(colorB);
    CC_SAFE_FREE(colorA);
    CC_SAFE_FREE(deltaColorR);
    CC_SAFE_FREE(deltaColorG);
    CC_SAFE_FREE(deltaColorB);
    CC_SAFE_FREE(deltaColorA);
    CC_SAFE_FREE(size);
    CC_SAFE_FREE(deltaSize);
    CC_SAFE_FREE(rotation);
    CC_SAFE_FREE(deltaRotation);
    CC_SAFE_FREE(timeToLive);
    CC_SAFE_FREE(atlasIndex);
    
    CC_SAFE_FREE(modeA.dirX);
    CC_SAFE_FREE(modeA.dirY);
    CC_SAFE_FREE(modeA.radialAccel);
    CC_SAFE_FREE(modeA.tangentialAccel);
    
    CC_SAFE_FREE(modeB.angle);
    CC_SAFE_FREE(modeB.degreesPerSecond);
    CC_SAFE_FREE(modeB.deltaRadius);
    CC_SAFE_FREE(modeB.radius);
}

Vector<ParticleSystem*> ParticleSystem::__allInstances;
float ParticleSystem::__totalParticleCountFactor = 1.0f;

ParticleSystem::ParticleSystem()
: _isBlendAdditive(false)
, _isAutoRemoveOnFinish(false)
, _plistFile("")
, _elapsed(0)
, _configName("")
, _emitCounter(0)
, _batchNode(nullptr)
, _atlasIndex(0)
, _transformSystemDirty(false)
, _allocatedParticles(0)
, _isActive(true)
, _particleCount(0)
, _duration(0)
, _life(0)
, _lifeVar(0)
, _angle(0)
, _angleVar(0)
, _emitterMode(Mode::GRAVITY)
, _startSize(0)
, _startSizeVar(0)
, _endSize(0)
, _endSizeVar(0)
, _startSpin(0)
, _startSpinVar(0)
, _endSpin(0)
, _endSpinVar(0)
, _emissionRate(0)
, _totalParticles(0)
, _texture(nullptr)
, _blendFunc(BlendFunc::ALPHA_PREMULTIPLIED)
, _opacityModifyRGB(false)
, _yCoordFlipped(1)
, _positionType(PositionType::FREE)
, _paused(false)
, _sourcePositionCompatible(true) // In the furture this member's default value maybe false or be removed.
{
    modeA.gravity.setZero();
    modeA.speed = 0;
    modeA.speedVar = 0;
    modeA.tangentialAccel = 0;
    modeA.tangentialAccelVar = 0;
    modeA.radialAccel = 0;
    modeA.radialAccelVar = 0;
    modeA.rotationIsDir = false;
    modeB.startRadius = 0;
    modeB.startRadiusVar = 0;
    modeB.endRadius = 0;
    modeB.endRadiusVar = 0;            
    modeB.rotatePerSecond = 0;
    modeB.rotatePerSecondVar = 0;
}
// implementation ParticleSystem

ParticleSystem * ParticleSystem::create(const std::string& plistFile)
{
    ParticleSystem *ret = new (std::nothrow) ParticleSystem();
    if (ret && ret->initWithFile(plistFile))
    {
        ret->autorelease();
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return ret;
}

ParticleSystem* ParticleSystem::createWithTotalParticles(int numberOfParticles)
{
    ParticleSystem *ret = new (std::nothrow) ParticleSystem();
    if (ret && ret->initWithTotalParticles(numberOfParticles))
    {
        ret->autorelease();
        return ret;
    }
    CC_SAFE_DELETE(ret);
    return ret;
}

// static
Vector<ParticleSystem*>& ParticleSystem::getAllParticleSystems()
{
    return __allInstances;
}

void ParticleSystem::setTotalParticleCountFactor(float factor)
{
    __totalParticleCountFactor = factor;
}

bool ParticleSystem::init()
{
    return initWithTotalParticles(150);
}

bool ParticleSystem::initWithFile(const std::string& plistFile)
{
    bool ret = false;
    _plistFile = FileUtils::getInstance()->fullPathForFilename(plistFile);
    ValueMap dict = FileUtils::getInstance()->getValueMapFromFile(_plistFile);

    CCASSERT( !dict.empty(), "Particles: file not found");
    
    // FIXME: compute path from a path, should define a function somewhere to do it
    string listFilePath = plistFile;
    if (listFilePath.find('/') != string::npos)
    {
        listFilePath = listFilePath.substr(0, listFilePath.rfind('/') + 1);
        ret = this->initWithDictionary(dict, listFilePath);
    }
    else
    {
        ret = this->initWithDictionary(dict, "");
    }
    
    return ret;
}

bool ParticleSystem::initWithDictionary(ValueMap& dictionary)
{
    return initWithDictionary(dictionary, "");
}

bool ParticleSystem::initWithDictionary(ValueMap& dictionary, const std::string& dirname)
{
    bool ret = false;
    unsigned char *buffer = nullptr;
    unsigned char *deflated = nullptr;
    Image *image = nullptr;
    do 
    {
        int maxParticles = dictionary["maxParticles"].asInt();
        // self, not super
        if(this->initWithTotalParticles(maxParticles))
        {
            // Emitter name in particle designer 2.0
            _configName = dictionary["configName"].asString();

            // angle
            _angle = dictionary["angle"].asFloat();
            _angleVar = dictionary["angleVariance"].asFloat();

            // duration
            _duration = dictionary["duration"].asFloat();

            // blend function 
            if (!_configName.empty())
            {
                _blendFunc.src = utils::toBackendBlendFactor((int)dictionary["blendFuncSource"].asFloat());
            }
            else
            {
                _blendFunc.src = utils::toBackendBlendFactor(dictionary["blendFuncSource"].asInt());
            }
            _blendFunc.dst = utils::toBackendBlendFactor(dictionary["blendFuncDestination"].asInt());

            // color
            _startColor.r = dictionary["startColorRed"].asFloat();
            _startColor.g = dictionary["startColorGreen"].asFloat();
            _startColor.b = dictionary["startColorBlue"].asFloat();
            _startColor.a = dictionary["startColorAlpha"].asFloat();

            _startColorVar.r = dictionary["startColorVarianceRed"].asFloat();
            _startColorVar.g = dictionary["startColorVarianceGreen"].asFloat();
            _startColorVar.b = dictionary["startColorVarianceBlue"].asFloat();
            _startColorVar.a = dictionary["startColorVarianceAlpha"].asFloat();

            _endColor.r = dictionary["finishColorRed"].asFloat();
            _endColor.g = dictionary["finishColorGreen"].asFloat();
            _endColor.b = dictionary["finishColorBlue"].asFloat();
            _endColor.a = dictionary["finishColorAlpha"].asFloat();

            _endColorVar.r = dictionary["finishColorVarianceRed"].asFloat();
            _endColorVar.g = dictionary["finishColorVarianceGreen"].asFloat();
            _endColorVar.b = dictionary["finishColorVarianceBlue"].asFloat();
            _endColorVar.a = dictionary["finishColorVarianceAlpha"].asFloat();

            // particle size
            _startSize = dictionary["startParticleSize"].asFloat();
            _startSizeVar = dictionary["startParticleSizeVariance"].asFloat();
            _endSize = dictionary["finishParticleSize"].asFloat();
            _endSizeVar = dictionary["finishParticleSizeVariance"].asFloat();

            // position
            float x = dictionary["sourcePositionx"].asFloat();
            float y = dictionary["sourcePositiony"].asFloat();
	    if(!_sourcePositionCompatible) {
                this->setSourcePosition(Vec2(x, y));
	    }
            else {
		this->setPosition(Vec2(x, y));
	    }
            _posVar.x = dictionary["sourcePositionVariancex"].asFloat();
            _posVar.y = dictionary["sourcePositionVariancey"].asFloat();

            // Spinning
            _startSpin = dictionary["rotationStart"].asFloat();
            _startSpinVar = dictionary["rotationStartVariance"].asFloat();
            _endSpin= dictionary["rotationEnd"].asFloat();
            _endSpinVar= dictionary["rotationEndVariance"].asFloat();

            _emitterMode = (Mode) dictionary["emitterType"].asInt();

            // Mode A: Gravity + tangential accel + radial accel
            if (_emitterMode == Mode::GRAVITY)
            {
                // gravity
                modeA.gravity.x = dictionary["gravityx"].asFloat();
                modeA.gravity.y = dictionary["gravityy"].asFloat();

                // speed
                modeA.speed = dictionary["speed"].asFloat();
                modeA.speedVar = dictionary["speedVariance"].asFloat();

                // radial acceleration
                modeA.radialAccel = dictionary["radialAcceleration"].asFloat();
                modeA.radialAccelVar = dictionary["radialAccelVariance"].asFloat();

                // tangential acceleration
                modeA.tangentialAccel = dictionary["tangentialAcceleration"].asFloat();
                modeA.tangentialAccelVar = dictionary["tangentialAccelVariance"].asFloat();
                
                // rotation is dir
                modeA.rotationIsDir = dictionary["rotationIsDir"].asBool();
            }

            // or Mode B: radius movement
            else if (_emitterMode == Mode::RADIUS)
            {
                if (!_configName.empty())
                {
                    modeB.startRadius = dictionary["maxRadius"].asInt();
                }
                else
                {
                    modeB.startRadius = dictionary["maxRadius"].asFloat();
                }
                modeB.startRadiusVar = dictionary["maxRadiusVariance"].asFloat();
                if (!_configName.empty())
                {
                    modeB.endRadius = dictionary["minRadius"].asInt();
                }
                else
                {
                    modeB.endRadius = dictionary["minRadius"].asFloat();
                }
                
                if (dictionary.find("minRadiusVariance") != dictionary.end())
                {
                    modeB.endRadiusVar = dictionary["minRadiusVariance"].asFloat();
                }
                else
                {
                    modeB.endRadiusVar = 0.0f;
                }
                
                if (!_configName.empty())
                {
                    modeB.rotatePerSecond = dictionary["rotatePerSecond"].asInt();
                }
                else
                {
                    modeB.rotatePerSecond = dictionary["rotatePerSecond"].asFloat();
                }
                modeB.rotatePerSecondVar = dictionary["rotatePerSecondVariance"].asFloat();

            } else {
                CCASSERT( false, "Invalid emitterType in config file");
                CC_BREAK_IF(true);
            }

            // life span
            _life = dictionary["particleLifespan"].asFloat();
            _lifeVar = dictionary["particleLifespanVariance"].asFloat();

            // emission Rate
            _emissionRate = _totalParticles / _life;

            //don't get the internal texture if a batchNode is used
            if (!_batchNode)
            {
                // Set a compatible default for the alpha transfer
                _opacityModifyRGB = false;

                // texture        
                // Try to get the texture from the cache
                std::string textureName = dictionary["textureFileName"].asString();
                
                size_t rPos = textureName.rfind('/');
               
                if (rPos != string::npos)
                {
                    string textureDir = textureName.substr(0, rPos + 1);
                    
                    if (!dirname.empty() && textureDir != dirname)
                    {
                        textureName = textureName.substr(rPos+1);
                        textureName = dirname + textureName;
                    }
                }
                else if (!dirname.empty() && !textureName.empty())
                {
                	textureName = dirname + textureName;
                }
                
                Texture2D *tex = nullptr;
                
                if (!textureName.empty())
                {
                    // set not pop-up message box when load image failed
                    bool notify = FileUtils::getInstance()->isPopupNotify();
                    FileUtils::getInstance()->setPopupNotify(false);
                    tex = Director::getInstance()->getTextureCache()->addImage(textureName);
                    // reset the value of UIImage notify
                    FileUtils::getInstance()->setPopupNotify(notify);
                }
                
                if (tex)
                {
                    setTexture(tex);
                }
                else if( dictionary.find("textureImageData") != dictionary.end() )
                {                        
                    std::string textureData = dictionary.at("textureImageData").asString();
                    CCASSERT(!textureData.empty(), "textureData can't be empty!");
                    
                    auto dataLen = textureData.size();
                    if (dataLen != 0)
                    {
                        // if it fails, try to get it from the base64-gzipped data    
                        int decodeLen = base64Decode((unsigned char*)textureData.c_str(), (unsigned int)dataLen, &buffer);
                        CCASSERT( buffer != nullptr, "CCParticleSystem: error decoding textureImageData");
                        CC_BREAK_IF(!buffer);
                        
                        ssize_t deflatedLen = ZipUtils::inflateMemory(buffer, decodeLen, &deflated);
                        CCASSERT( deflated != nullptr, "CCParticleSystem: error ungzipping textureImageData");
                        CC_BREAK_IF(!deflated);
                        
                        // For android, we should retain it in VolatileTexture::addImage which invoked in Director::getInstance()->getTextureCache()->addUIImage()
                        image = new (std::nothrow) Image();
                        bool isOK = image->initWithImageData(deflated, deflatedLen);
                        CCASSERT(isOK, "CCParticleSystem: error init image with Data");
                        CC_BREAK_IF(!isOK);
                        
                        setTexture(Director::getInstance()->getTextureCache()->addImage(image, _plistFile + textureName));

                        image->release();
                    }
                }
                
                _yCoordFlipped = dictionary.find("yCoordFlipped") == dictionary.end() ? 1 : dictionary.at("yCoordFlipped").asInt();

                if( !this->_texture)
                    CCLOGWARN("cocos2d: Warning: ParticleSystemQuad system without a texture");
            }
            ret = true;
        }
    } while (0);
    free(buffer);
    free(deflated);
    return ret;
}

bool ParticleSystem::initWithTotalParticles(int numberOfParticles)
{
    _totalParticles = numberOfParticles;
    
    _particleData.release();

    if( !_particleData.init(_totalParticles) )
    {
        CCLOG("Particle system: not enough memory");
        this->release();
        return false;
    }
    _allocatedParticles = numberOfParticles;

    if (_batchNode)
    {
        for (int i = 0; i < _totalParticles; i++)
        {
            _particleData.atlasIndex[i] = i;
        }
    }
    // default, active
    _isActive = true;

    // default blend function
    _blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;

    // default movement type;
    _positionType = PositionType::FREE;

    // by default be in mode A:
    _emitterMode = Mode::GRAVITY;

    // default: modulate
    // FIXME:: not used
    //    colorModulate = YES;

    _isAutoRemoveOnFinish = false;

    // Optimization: compile updateParticle method
    //updateParticleSel = @selector(updateQuadWithParticle:newPosition:);
    //updateParticleImp = (CC_UPDATE_PARTICLE_IMP) [self methodForSelector:updateParticleSel];
    //for batchNode
    _transformSystemDirty = false;

    return true;
}

ParticleSystem::~ParticleSystem()
{
    // Since the scheduler retains the "target (in this case the ParticleSystem)
	// it is not needed to call "unscheduleUpdate" here. In fact, it will be called in "cleanup"
    //unscheduleUpdate();
    _particleData.release();
    CC_SAFE_RELEASE(_texture);
}

void ParticleSystem::addParticles(int count)
{
    if (_paused)
        return;
    uint32_t RANDSEED = rand();

    int start = _particleCount;
    _particleCount += count;
    
    //life
    for (int i = start; i < _particleCount ; ++i)
    {
        float theLife = _life + _lifeVar * RANDOM_M11(&RANDSEED);
        _particleData.timeToLive[i] = MAX(0, theLife);
    }
    
    //position
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.posx[i] = _sourcePosition.x + _posVar.x * RANDOM_M11(&RANDSEED);
    }
    
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.posy[i] = _sourcePosition.y + _posVar.y * RANDOM_M11(&RANDSEED);
    }
    
    //color
#define SET_COLOR(c, b, v)\
for (int i = start; i < _particleCount; ++i)\
{\
c[i] = clampf( b + v * RANDOM_M11(&RANDSEED) , 0 , 1 );\
}
    
    SET_COLOR(_particleData.colorR, _startColor.r, _startColorVar.r);
    SET_COLOR(_particleData.colorG, _startColor.g, _startColorVar.g);
    SET_COLOR(_particleData.colorB, _startColor.b, _startColorVar.b);
    SET_COLOR(_particleData.colorA, _startColor.a, _startColorVar.a);
    
    SET_COLOR(_particleData.deltaColorR, _endColor.r, _endColorVar.r);
    SET_COLOR(_particleData.deltaColorG, _endColor.g, _endColorVar.g);
    SET_COLOR(_particleData.deltaColorB, _endColor.b, _endColorVar.b);
    SET_COLOR(_particleData.deltaColorA, _endColor.a, _endColorVar.a);
    
#define SET_DELTA_COLOR(c, dc)\
for (int i = start; i < _particleCount; ++i)\
{\
dc[i] = (dc[i] - c[i]) / _particleData.timeToLive[i];\
}
    
    SET_DELTA_COLOR(_particleData.colorR, _particleData.deltaColorR);
    SET_DELTA_COLOR(_particleData.colorG, _particleData.deltaColorG);
    SET_DELTA_COLOR(_particleData.colorB, _particleData.deltaColorB);
    SET_DELTA_COLOR(_particleData.colorA, _particleData.deltaColorA);
    
    //size
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.size[i] = _startSize + _startSizeVar * RANDOM_M11(&RANDSEED);
        _particleData.size[i] = MAX(0, _particleData.size[i]);
    }
    
    if (_endSize != START_SIZE_EQUAL_TO_END_SIZE)
    {
        for (int i = start; i < _particleCount; ++i)
        {
            float endSize = _endSize + _endSizeVar * RANDOM_M11(&RANDSEED);
            endSize = MAX(0, endSize);
            _particleData.deltaSize[i] = (endSize - _particleData.size[i]) / _particleData.timeToLive[i];
        }
    }
    else
    {
        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.deltaSize[i] = 0.0f;
        }
    }
    
    // rotation
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.rotation[i] = _startSpin + _startSpinVar * RANDOM_M11(&RANDSEED);
    }
    for (int i = start; i < _particleCount; ++i)
    {
        float endA = _endSpin + _endSpinVar * RANDOM_M11(&RANDSEED);
        _particleData.deltaRotation[i] = (endA - _particleData.rotation[i]) / _particleData.timeToLive[i];
    }
    
    // position
    Vec2 pos;
    if (_positionType == PositionType::FREE)
    {
        pos = this->convertToWorldSpace(Vec2::ZERO);
    }
    else if (_positionType == PositionType::RELATIVE)
    {
        pos = _position;
    }
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.startPosX[i] = pos.x;
    }
    for (int i = start; i < _particleCount; ++i)
    {
        _particleData.startPosY[i] = pos.y;
    }
    
    // Mode Gravity: A
    if (_emitterMode == Mode::GRAVITY)
    {
        
        // radial accel
        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.modeA.radialAccel[i] = modeA.radialAccel + modeA.radialAccelVar * RANDOM_M11(&RANDSEED);
        }
        
        // tangential accel
        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.modeA.tangentialAccel[i] = modeA.tangentialAccel + modeA.tangentialAccelVar * RANDOM_M11(&RANDSEED);
        }
        
        // rotation is dir
        if( modeA.rotationIsDir )
        {
            for (int i = start; i < _particleCount; ++i)
            {
                float a = CC_DEGREES_TO_RADIANS( _angle + _angleVar * RANDOM_M11(&RANDSEED) );
                Vec2 v(cosf( a ), sinf( a ));
                float s = modeA.speed + modeA.speedVar * RANDOM_M11(&RANDSEED);
                Vec2 dir = v * s;
                _particleData.modeA.dirX[i] = dir.x;//v * s ;
                _particleData.modeA.dirY[i] = dir.y;
                _particleData.rotation[i] = -CC_RADIANS_TO_DEGREES(dir.getAngle());
            }
        }
        else
        {
            for (int i = start; i < _particleCount; ++i)
            {
                float a = CC_DEGREES_TO_RADIANS( _angle + _angleVar * RANDOM_M11(&RANDSEED) );
                Vec2 v(cosf( a ), sinf( a ));
                float s = modeA.speed + modeA.speedVar * RANDOM_M11(&RANDSEED);
                Vec2 dir = v * s;
                _particleData.modeA.dirX[i] = dir.x;//v * s ;
                _particleData.modeA.dirY[i] = dir.y;
            }
        }
        
    }
    
    // Mode Radius: B
    else
    {
        //Need to check by Jacky
        // Set the default diameter of the particle from the source position
        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.modeB.radius[i] = modeB.startRadius + modeB.startRadiusVar * RANDOM_M11(&RANDSEED);
        }

        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.modeB.angle[i] = CC_DEGREES_TO_RADIANS( _angle + _angleVar * RANDOM_M11(&RANDSEED));
        }
        
        for (int i = start; i < _particleCount; ++i)
        {
            _particleData.modeB.degreesPerSecond[i] = CC_DEGREES_TO_RADIANS(modeB.rotatePerSecond + modeB.rotatePerSecondVar * RANDOM_M11(&RANDSEED));
        }
        
        if(modeB.endRadius == START_RADIUS_EQUAL_TO_END_RADIUS)
        {
            for (int i = start; i < _particleCount; ++i)
            {
                _particleData.modeB.deltaRadius[i] = 0.0f;
            }
        }
        else
        {
            for (int i = start; i < _particleCount; ++i)
            {
                float endRadius = modeB.endRadius + modeB.endRadiusVar * RANDOM_M11(&RANDSEED);
                _particleData.modeB.deltaRadius[i] = (endRadius - _particleData.modeB.radius[i]) / _particleData.timeToLive[i];
            }
        }
    }
}

void ParticleSystem::onEnter()
{
#if CC_ENABLE_SCRIPT_BINDING
    if (_scriptType == kScriptTypeJavascript)
    {
        if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnEnter))
            return;
    }
#endif
    
    Node::onEnter();
    
    // update after action in run!
    this->scheduleUpdateWithPriority(1);

    __allInstances.pushBack(this);
}

void ParticleSystem::onExit()
{
#if CC_ENABLE_SCRIPT_BINDING
    if (_scriptType == kScriptTypeJavascript)
    {
        if (ScriptEngineManager::sendNodeEventToJSExtended(this, kNodeOnExit))
            return;
    }
#endif
    
    this->unscheduleUpdate();
    Node::onExit();

    auto iter = std::find(std::begin(__allInstances), std::end(__allInstances), this);
    if (iter != std::end(__allInstances))
    {
        __allInstances.erase(iter);
    }
}

void ParticleSystem::stopSystem()
{
    _isActive = false;
    _elapsed = _duration;
    _emitCounter = 0;
}

void ParticleSystem::resetSystem()
{
    _isActive = true;
    _elapsed = 0;
    for (int i = 0; i < _particleCount; ++i)
    {
        _particleData.timeToLive[i] = 0.0f;
    }
}

bool ParticleSystem::isFull()
{
    return (_particleCount == _totalParticles);
}

// ParticleSystem - MainLoop
void ParticleSystem::update(float dt)
{
    CC_PROFILER_START_CATEGORY(kProfilerCategoryParticles , "CCParticleSystem - update");

    if (_isActive && _emissionRate)
    {
        float rate = 1.0f / _emissionRate;
        int totalParticles = static_cast<int>(_totalParticles * __totalParticleCountFactor);
        
        //issue #1201, prevent bursts of particles, due to too high emitCounter
        if (_particleCount < totalParticles)
        {
            _emitCounter += dt;
            if (_emitCounter < 0.f)
                _emitCounter = 0.f;
        }
        
        int emitCount = MIN(totalParticles - _particleCount, _emitCounter / rate);
        addParticles(emitCount);
        _emitCounter -= rate * emitCount;
        
        _elapsed += dt;
        if (_elapsed < 0.f)
            _elapsed = 0.f;
        if (_duration != DURATION_INFINITY && _duration < _elapsed)
        {
            this->stopSystem();
        }
    }
    
    {
        for (int i = 0; i < _particleCount; ++i)
        {
            _particleData.timeToLive[i] -= dt;
        }
        
        for (int i = 0; i < _particleCount; ++i)
        {
            if (_particleData.timeToLive[i] <= 0.0f)
            {
                int j = _particleCount - 1;
                while (j > 0 && _particleData.timeToLive[j] <= 0)
                {
                    _particleCount--;
                    j--;
                }
                _particleData.copyParticle(i, _particleCount - 1);
                if (_batchNode)
                {
                    //disable the switched particle
                    int currentIndex = _particleData.atlasIndex[i];
                    _batchNode->disableParticle(_atlasIndex + currentIndex);
                    //switch indexes
                    _particleData.atlasIndex[_particleCount - 1] = currentIndex;
                }
                --_particleCount;
                if( _particleCount == 0 && _isAutoRemoveOnFinish )
                {
                    this->unscheduleUpdate();
                    _parent->removeChild(this, true);
                    return;
                }
            }
        }
        
        if (_emitterMode == Mode::GRAVITY)
        {
            for (int i = 0 ; i < _particleCount; ++i)
            {
                particle_point tmp, radial = {0.0f, 0.0f}, tangential;
                
                // radial acceleration
                if (_particleData.posx[i] || _particleData.posy[i])
                {
                    normalize_point(_particleData.posx[i], _particleData.posy[i], &radial);
                }
                tangential = radial;
                radial.x *= _particleData.modeA.radialAccel[i];
                radial.y *= _particleData.modeA.radialAccel[i];
                
                // tangential acceleration
                std::swap(tangential.x, tangential.y);
                tangential.x *= - _particleData.modeA.tangentialAccel[i];
                tangential.y *= _particleData.modeA.tangentialAccel[i];
                
                // (gravity + radial + tangential) * dt
                tmp.x = radial.x + tangential.x + modeA.gravity.x;
                tmp.y = radial.y + tangential.y + modeA.gravity.y;
                tmp.x *= dt;
                tmp.y *= dt;
                
                _particleData.modeA.dirX[i] += tmp.x;
                _particleData.modeA.dirY[i] += tmp.y;
                
                // this is cocos2d-x v3.0
                // if (_configName.length()>0 && _yCoordFlipped != -1)
                
                // this is cocos2d-x v3.0
                tmp.x = _particleData.modeA.dirX[i] * dt * _yCoordFlipped;
                tmp.y = _particleData.modeA.dirY[i] * dt * _yCoordFlipped;
                _particleData.posx[i] += tmp.x;
                _particleData.posy[i] += tmp.y;
            }
        }
        else
        {
            //Why use so many for-loop separately instead of putting them together?
            //When the processor needs to read from or write to a location in memory,
            //it first checks whether a copy of that data is in the cache.
            //And every property's memory of the particle system is continuous,
            //for the purpose of improving cache hit rate, we should process only one property in one for-loop AFAP.
            //It was proved to be effective especially for low-end machine. 
            for (int i = 0; i < _particleCount; ++i)
            {
                _particleData.modeB.angle[i] += _particleData.modeB.degreesPerSecond[i] * dt;
            }
            
            for (int i = 0; i < _particleCount; ++i)
            {
                _particleData.modeB.radius[i] += _particleData.modeB.deltaRadius[i] * dt;
            }
            
            for (int i = 0; i < _particleCount; ++i)
            {
                _particleData.posx[i] = - cosf(_particleData.modeB.angle[i]) * _particleData.modeB.radius[i];
            }
            for (int i = 0; i < _particleCount; ++i)
            {
                _particleData.posy[i] = - sinf(_particleData.modeB.angle[i]) * _particleData.modeB.radius[i] * _yCoordFlipped;
            }
        }
        
        //color r,g,b,a
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.colorR[i] += _particleData.deltaColorR[i] * dt;
        }
        
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.colorG[i] += _particleData.deltaColorG[i] * dt;
        }
        
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.colorB[i] += _particleData.deltaColorB[i] * dt;
        }
        
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.colorA[i] += _particleData.deltaColorA[i] * dt;
        }
        //size
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.size[i] += (_particleData.deltaSize[i] * dt);
            _particleData.size[i] = MAX(0, _particleData.size[i]);
        }
        //angle
        for (int i = 0 ; i < _particleCount; ++i)
        {
            _particleData.rotation[i] += _particleData.deltaRotation[i] * dt;
        }
        
        updateParticleQuads();
        _transformSystemDirty = false;
    }

    // only update gl buffer when visible
    if (_visible && ! _batchNode)
    {
        postStep();
    }

    CC_PROFILER_STOP_CATEGORY(kProfilerCategoryParticles , "CCParticleSystem - update");
}

void ParticleSystem::updateWithNoTime()
{
    this->update(0.0f);
}

void ParticleSystem::updateParticleQuads()
{
    //should be overridden
}

void ParticleSystem::postStep()
{
    // should be overridden
}

// ParticleSystem - Texture protocol
void ParticleSystem::setTexture(Texture2D* var)
{
    if (_texture != var)
    {
        CC_SAFE_RETAIN(var);
        CC_SAFE_RELEASE(_texture);
        _texture = var;
        updateBlendFunc();
    }
}

void ParticleSystem::updateBlendFunc()
{
    CCASSERT(! _batchNode, "Can't change blending functions when the particle is being batched");

    if(_texture)
    {
        bool premultiplied = _texture->hasPremultipliedAlpha();
        
        _opacityModifyRGB = false;
        
        if( _texture && ( _blendFunc.src == CC_BLEND_SRC && _blendFunc.dst == CC_BLEND_DST ) )
        {
            if( premultiplied )
            {
                _opacityModifyRGB = true;
            }
            else
            {
                _blendFunc = BlendFunc::ALPHA_NON_PREMULTIPLIED;
            }
        }
    }
}

Texture2D * ParticleSystem::getTexture() const
{
    return _texture;
}

// ParticleSystem - Additive Blending
void ParticleSystem::setBlendAdditive(bool additive)
{
    if( additive )
    {
        _blendFunc = BlendFunc::ADDITIVE;
    }
    else
    {
        if( _texture && ! _texture->hasPremultipliedAlpha() )
            _blendFunc = BlendFunc::ALPHA_NON_PREMULTIPLIED;
        else 
            _blendFunc = BlendFunc::ALPHA_PREMULTIPLIED;
    }
}

bool ParticleSystem::isBlendAdditive() const
{
    return( _blendFunc.src == backend::BlendFactor::SRC_ALPHA && _blendFunc.dst == backend::BlendFactor::ONE);
}

// ParticleSystem - Properties of Gravity Mode 
void ParticleSystem::setTangentialAccel(float t)
{
    CCASSERT( _emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.tangentialAccel = t;
}

float ParticleSystem::getTangentialAccel() const
{
    CCASSERT( _emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.tangentialAccel;
}

void ParticleSystem::setTangentialAccelVar(float t)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.tangentialAccelVar = t;
}

float ParticleSystem::getTangentialAccelVar() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.tangentialAccelVar;
}    

void ParticleSystem::setRadialAccel(float t)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.radialAccel = t;
}

float ParticleSystem::getRadialAccel() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.radialAccel;
}

void ParticleSystem::setRadialAccelVar(float t)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.radialAccelVar = t;
}

float ParticleSystem::getRadialAccelVar() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.radialAccelVar;
}

void ParticleSystem::setRotationIsDir(bool t)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.rotationIsDir = t;
}

bool ParticleSystem::getRotationIsDir() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.rotationIsDir;
}

void ParticleSystem::setGravity(const Vec2& g)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.gravity = g;
}

const Vec2& ParticleSystem::getGravity()
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.gravity;
}

void ParticleSystem::setSpeed(float speed)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.speed = speed;
}

float ParticleSystem::getSpeed() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.speed;
}

void ParticleSystem::setSpeedVar(float speedVar)
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    modeA.speedVar = speedVar;
}

float ParticleSystem::getSpeedVar() const
{
    CCASSERT(_emitterMode == Mode::GRAVITY, "Particle Mode should be Gravity");
    return modeA.speedVar;
}

// ParticleSystem - Properties of Radius Mode
void ParticleSystem::setStartRadius(float startRadius)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.startRadius = startRadius;
}

float ParticleSystem::getStartRadius() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.startRadius;
}

void ParticleSystem::setStartRadiusVar(float startRadiusVar)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.startRadiusVar = startRadiusVar;
}

float ParticleSystem::getStartRadiusVar() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.startRadiusVar;
}

void ParticleSystem::setEndRadius(float endRadius)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.endRadius = endRadius;
}

float ParticleSystem::getEndRadius() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.endRadius;
}

void ParticleSystem::setEndRadiusVar(float endRadiusVar)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.endRadiusVar = endRadiusVar;
}

float ParticleSystem::getEndRadiusVar() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.endRadiusVar;
}

void ParticleSystem::setRotatePerSecond(float degrees)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.rotatePerSecond = degrees;
}

float ParticleSystem::getRotatePerSecond() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.rotatePerSecond;
}

void ParticleSystem::setRotatePerSecondVar(float degrees)
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    modeB.rotatePerSecondVar = degrees;
}

float ParticleSystem::getRotatePerSecondVar() const
{
    CCASSERT(_emitterMode == Mode::RADIUS, "Particle Mode should be Radius");
    return modeB.rotatePerSecondVar;
}

bool ParticleSystem::isActive() const
{
    return _isActive;
}

int ParticleSystem::getTotalParticles() const
{
    return _totalParticles;
}

void ParticleSystem::setTotalParticles(int var)
{
    CCASSERT( var <= _allocatedParticles, "Particle: resizing particle array only supported for quads");
    _totalParticles = var;
}

const BlendFunc& ParticleSystem::getBlendFunc() const
{
    return _blendFunc;
}

void ParticleSystem::setBlendFunc(const BlendFunc &blendFunc)
{
    if( _blendFunc.src != blendFunc.src || _blendFunc.dst != blendFunc.dst ) {
        _blendFunc = blendFunc;
        this->updateBlendFunc();
    }
}

bool ParticleSystem::isAutoRemoveOnFinish() const
{
    return _isAutoRemoveOnFinish;
}

void ParticleSystem::setAutoRemoveOnFinish(bool var)
{
    _isAutoRemoveOnFinish = var;
}


// ParticleSystem - methods for batchNode rendering

ParticleBatchNode* ParticleSystem::getBatchNode() const
{
    return _batchNode;
}

void ParticleSystem::setBatchNode(ParticleBatchNode* batchNode)
{
    if( _batchNode != batchNode ) {

        _batchNode = batchNode; // weak reference

        if( batchNode ) {
            //each particle needs a unique index
            for (int i = 0; i < _totalParticles; i++)
            {
                _particleData.atlasIndex[i] = i;
            }
        }
    }
}

//don't use a transform matrix, this is faster
void ParticleSystem::setScale(float s)
{
    _transformSystemDirty = true;
    Node::setScale(s);
}

void ParticleSystem::setRotation(float newRotation)
{
    _transformSystemDirty = true;
    Node::setRotation(newRotation);
}

void ParticleSystem::setScaleX(float newScaleX)
{
    _transformSystemDirty = true;
    Node::setScaleX(newScaleX);
}

void ParticleSystem::setScaleY(float newScaleY)
{
    _transformSystemDirty = true;
    Node::setScaleY(newScaleY);
}

void ParticleSystem::start()
{
    resetSystem();
}

void ParticleSystem::stop()
{
    stopSystem();
}

bool ParticleSystem::isPaused() const
{
    return _paused;
}

void ParticleSystem::pauseEmissions()
{
    _paused = true;
}

void ParticleSystem::resumeEmissions()
{
    _paused = false;
}



NS_CC_END