5.cocos2d锚点

创建一个层T1LayerAnchorPoint

• AppDelegate.cpp

   bool AppDelegate::applicationDidFinishLaunching() {
       // initialize director
       auto director = Director::getInstance();
       auto glview = director->getOpenGLView();
       if(!glview) {
           glview = GLViewImpl::createWithRect("MyLayer", Rect(, , , ));
           director->setOpenGLView(glview);
       }
  
       director->getOpenGLView()->setDesignResolutionSize(, , ResolutionPolicy::SHOW_ALL);
  
       // turn on display FPS
       director->setDisplayStats(true);
  
       // set FPS. the default value is 1.0/60 if you don't call this
       director->setAnimationInterval(1.0 / );
  
       FileUtils::getInstance()->addSearchPath("res");
  
       // create a scene. it's an autorelease object
       //auto scene = HelloWorld::createScene();
  
       //CCScene *pScene = MyScene::create();
       CCScene *pScene = T1LayerAnchorPoint::scene();
  
       // run
       director->runWithScene(pScene);
  
       return true;
   }

• T1LayerAnchorPoint.h

   #pragma once
   #include "cocos2d.h"
   USING_NS_CC;
  
   class T1LayerAnchorPoint:public CCLayer
   {
   public:
       //create->init
       static T1LayerAnchorPoint*create();
       bool init();
       static CCScene *scene();
  
       //画线
       virtual void draw(cocos2d::Renderer *renderer, const cocos2d::Mat4& transform, uint32_t flags);
   };

• T1LayerAnchorPoint.cpp

   #include "T1LayerAnchorPoint.h"
  
   //创建层
   T1LayerAnchorPoint*T1LayerAnchorPoint::create()
   {
       T1LayerAnchorPoint *pRet = new T1LayerAnchorPoint();
       if (pRet && pRet->init())
       {
           pRet->autorelease();
       }
       else
       {
           delete pRet;
           pRet = NULL;
       }
       return pRet;
  
   }
  
   //初始化层
   bool T1LayerAnchorPoint::init()
   {
       CCLayer::init();
  
       CCSize winSize = CCDirector::sharedDirector()->getWinSize();
       CCSprite *spr = CCSprite::create("anchor3.png");
       //设置锚点
       spr->setAnchorPoint(ccp(, ));
       spr->setPosition(ccp(winSize.width / , winSize.height / ));
       addChild(spr);
       return true;
   }
  
   CCScene *T1LayerAnchorPoint::scene()
   {
       CCScene *scene = CCScene::create();
       T1LayerAnchorPoint *layer = T1LayerAnchorPoint::create();
       scene->addChild(layer);
       return scene;
   }
  
   void T1LayerAnchorPoint::draw(cocos2d::Renderer *renderer, const cocos2d::Mat4& transform, uint32_t flags)
   {
       CCSize winSize = CCDirector::sharedDirector()->getWinSize();
       ccDrawColor4B(, , , );
  
       ccDrawLine(ccp(, winSize.height / ), ccp(winSize.width, winSize.height / ));
       ccDrawLine(ccp(winSize.width / , ), ccp(winSize.width / , winSize.height));
   }