Cocos3--1. Engine Run Flow

1. Program Entry

    Create the application instance    appdelegate app;    Return Application::getinstance ()->run ();

2. Main loop
int Application::Run ():

while (!glview->windowshouldclose ())    {        QueryPerformanceCounter (&nnow);        if (Nnow.quadpart-nlast.quadpart > _animationinterval.quadpart)        {            nlast.quadpart = Nnow.quadpart;            Director of the main circulation            director->mainloop ();            Glview->pollevents ();        }        else        {            Sleep (0);        }    }

Mainloop->drawscene:

    Pushmatrix (Matrix_stack_type::matrix_stack_modelview);        if (_runningscene)    {        //clear draw stats        _renderer->cleardrawstats ();        Visit and draw scene (but draw just add render command)//Render command is in: Renderer->render ();        Render the scene        _runningscene->render (_renderer);                _eventdispatcher->dispatchevent (_eventaftervisit);    } Notification node, rendered independently of the scene    //Draw the Notifications node    if (_notificationnode)    {        _notificationnode-> Visit (_renderer, mat4::identity, 0);    }    if (_displaystats)    {        showstats ();    } Below are the rendered _notificationnode and stats    _renderer->render ();    _eventdispatcher->dispatchevent (_eventafterdraw);    Popmatrix (Matrix_stack_type::matrix_stack_modelview);    _totalframes++;    Swap buffers    if (_openglview)    {        _openglview->swapbuffers ();    }

void Scene::render (renderer* Renderer):

        Camera::_visitingcamera = Defaultcamera;        Director->pushmatrix (matrix_stack_type::matrix_stack_projection);        Director->loadmatrix (Matrix_stack_type::matrix_stack_projection, camera::_visitingcamera-> Getviewprojectionmatrix ());                Visit the scene        visit (renderer, mat4::identity, 0);        Renderer->render ();                Director->popmatrix (matrix_stack_type::matrix_stack_projection);

3. Node traversal

void Node::visit (renderer* Renderer, const MAT4 &parenttransform, uint32_t parentflags):

    Quick return if not visible.    Children won ' t be drawn.    if (!_visible) {return;    } uint32_t flags = Processparentflags (Parenttransform, parentflags); IMPORTANT://To ease the migration to v3.0, we still support the MAT4 stack,//It's deprecated and your co    De should not rely on it director* Director = Director::getinstance ();    Director->pushmatrix (Matrix_stack_type::matrix_stack_modelview);        Director->loadmatrix (Matrix_stack_type::matrix_stack_modelview, _modelviewtransform);    BOOL Visiblebycamera = Isvisitablebyvisitingcamera ();    int i = 0;        if (!_children.empty ()) {Sortallchildren (); Draw children ZOrder < 0 for (; I < _children.size (); i++) {Auto node = _children.at (i            );            if (node && node->_localzorder < 0) node->visit (renderer, _modelviewtransform, flags);        else break;  }//Self draw      if (Visiblebycamera) This->draw (renderer, _modelviewtransform, flags); for (Auto It=_children.cbegin () +i; it! = _children.cend (); ++it) (*it)->visit (renderer, _modelviewtransform,    Flags);    } else if (Visiblebycamera) {This->draw (renderer, _modelviewtransform, flags); } director->popmatrix (Matrix_stack_type::matrix_stack_modelview);

Cocos3--1. Engine Run Flow