PUParticleSystem3D* PUParticleSystem3D::create( const std::string &filePath )
{
    PUParticleSystem3D *ret = new (std::nothrow) PUParticleSystem3D();
    if (ret && ret->initWithFilePath(filePath))
    {
        ret->autorelease();
        return ret;
    }
    else
    {
        CC_SAFE_DELETE(ret);
        return nullptr;
    }
}