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(0, 0, 960, 640));
          director->setOpenGLView(glview);
      }
  
      director->getOpenGLView()->setDesignResolutionSize(960, 640, 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 / 60);
  
      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(0, 0));
      spr->setPosition(ccp(winSize.width / 2, winSize.height / 2));
      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(255, 0, 0, 255);
  
      ccDrawLine(ccp(0, winSize.height / 2), ccp(winSize.width, winSize.height / 2));
      ccDrawLine(ccp(winSize.width / 2, 0), ccp(winSize.width / 2, winSize.height));
  }