1.04 锚点

1.04 锚点




一、锚点影响了什么

    1、锚点影响 放置位置
    2、锚点影响 缩放 --- 缩放是围绕锚点旋转的
    3、锚点影响 旋转 --- 通常情况下，旋转是围绕锚点进行

二、忽略锚点

    1、忽略锚点 --- 将锚点置成 0,0
    2、通常情况下，Scene 是忽略锚点的


三、源代码

1、头文件
  1. #ifndef _T01LayerAnchorPoint_H_ 
  2. #define _T01LayerAnchorPoint_H_
  4. #include "cocos2d.h"
  5. USING_NS_CC;
  7. //锚点
  8. class T01LayerAnchorPoint:public CCLayer  
  9. {
  10. public:
  11.   static T01LayerAnchorPoint* create( );
  12.   static CCScene* scene( );
  13.   bool init( );
  15.   virtual void draw( );
  16.   virtual void mySchedule( float dt );
  18. private:
  19.   CCSprite* spr;//定时器需要
  20. };
  22. #endif

2、源文件
  1. #include "T01LayerAnchorPoint.h"
  4. CCScene* T01LayerAnchorPoint::scene( )
  5. {
  6.   CCScene* scene = CCScene::create( );
  7.   T01LayerAnchorPoint* layer = T01LayerAnchorPoint::create( );
  8.   //通常情况下，Scene 是忽略锚点的
  9.   //layer->ignoreAnchorPointForPosition( false ); //不忽略锚点
  10.   //CCLog( "x = %f, y = %f", layer->getPositionX( ), layer->getPositionY( ) );
  11.   scene->addChild( layer );
  13.   return scene;
  14. }
  16. T01LayerAnchorPoint* T01LayerAnchorPoint::create( )
  17. {
  18.   T01LayerAnchorPoint* pRet = new T01LayerAnchorPoint;
  19.   if (pRet && pRet->init())
  20.   {
  21.     pRet->autorelease( );
  22.   }
  23.   else
  24.   {
  25.     delete pRet;
  26.     pRet = NULL;
  27.   }
  28.   return pRet;
  29. }
  31. bool T01LayerAnchorPoint::init( )
  32. {
  33.   CCLayer::init( ); //父类初始化
  35.   //主战场
  36.   CCSize winSize = CCDirector::sharedDirector( )->getWinSize( );
  37.   spr = CCSprite::create( "anchor3.png" );
  40.   //锚点影响 放置位置 
  41.   //spr->setAnchorPoint( ccp( 0, 0 ) );
  42.   spr->setAnchorPoint( ccp( 0, 1 ) );
  43.   //spr->setAnchorPoint( ccp( 1, 0 ) );
  44.   //spr->setAnchorPoint( ccp( 1, 1 ) );
  46.   //锚点影响 缩放 --- 缩放是围绕锚点旋转的
  47.   //spr->setAnchorPoint( ccp( 0.5, 0.5 ) );
  48.   //spr->setAnchorPoint( ccp( 0.656, 0.5 ) );
  49.   //spr->setScale( 5.0f ); //缩放
  51.   //忽略锚点 --- 将锚点置成 0,0
  52.   spr->ignoreAnchorPointForPosition( false );
  55.   spr->setPosition( ccp( winSize.width / 2, winSize.height / 2 ) );
  57.   this->addChild( spr );
  59.   //锚点影响 旋转 --- 通常情况下，旋转是围绕锚点进行
  60.   //定时器
  61.   //typedef void (CCObject::*SEL_SCHEDULE)(float);
  62.   //schedule( schedule_selector(T01LayerAnchorPoint::mySchedule ), 2 ); //2秒钟触发 
  64.   return true;
  65. }
  68. void T01LayerAnchorPoint::draw( )
  69. {
  70.   //draw 绘图
  71.   CCSize winSize = CCDirector::sharedDirector( )->getWinSize( );
  72.   ccDrawColor4B( 255, 0, 0, 255 );
  73.   ccDrawLine( ccp( 0, winSize.height / 2 ), ccp( winSize.width, winSize.height/2) );
  74.   ccDrawLine( ccp( winSize.width / 2, 0 ), ccp( winSize.width/2 , winSize.height) );
  75. }
  77. void T01LayerAnchorPoint::mySchedule( float dt )
  78. {
  79.   static float ro = 0;
  80.   ro += 30;
  81.   spr->setRotation( ro );
  82. }







posted @ 2016-06-15 08:16  -刀狂剑痴-  阅读(211)  评论(0)  编辑  收藏  举报