[cocos2d-x]图层的旋转缩放效果

要实现一个两个图层叠加在一起，然后点击其中的一个图层，实现另外一个图层的旋转缩放的效果。 预期效果： 1.实现两个layer添加在一个场景中。 2.实现点击一个场景能实现另一个场景的旋转缩放的功能。 3.实现layer中精灵的随机生成和自由走动。 4.实现场景中具有触摸事件的精灵。

实现步骤： 1.首先分析一下这个效果是由两个图层组成的，先来实现一下上面的一个黄色图层 GameLayer.h：

#ifndef _______GameLayer__

#define _______GameLayer__

#include iostream 

#include "cocos2d.h"

using namespace cocos2d;

class GameLayer:public CCLayer

public:

 CCPoint gameLayerPosition;

 CCPoint lastTouchLocation;

 bool init();

 CREATE_FUNC(GameLayer);

 virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);

 virtual void ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent);

 virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);

 virtual void registerWithTouchDispatcher(void);

 void addRandomThings();

 void runRandomMoveSequence(CCNode* node);

#endif /* defined(_______GameLayer__) */

CCSize size = CCDirector::sharedDirector()- getWinSize(); CCSprite * background = CCSprite::create("grass.png"); background- setPosition(CCPointMake(size.width/2, size.height/2)); this- addChild(background); CCLabelTTF *label = CCLabelTTF::create("GameLayer", "Marker Felt", 44); label- setColor(ccBLACK); label- setPosition(CCPointMake(size.width/2, size.height/2)); label- setAnchorPoint(CCPointMake(0.5f, 1)); this- addChild(label); this- GameLayer::addRandomThings(); this- setTouchEnabled(true); return true; void GameLayer::registerWithTouchDispatcher() CCDirector::sharedDirector()- getTouchDispatcher()- addTargetedDelegate(this, 0, true); bool GameLayer::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) //记录点击下的坐标点 lastTouchLocation = HelloWorld::locationFromTouch(pTouch); return true; void GameLayer::ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) CCPoint currentTouchLocation = HelloWorld::locationFromTouch(pTouch); //获得两点之间的差值 CCPoint moveTo = ccpSub(lastTouchLocation, currentTouchLocation); moveTo = ccpMult(moveTo, -1); lastTouchLocation = currentTouchLocation; //将当前图层移动到鼠标移动的地方 this- setPosition(ccpAdd(this- getPosition(), moveTo)); CCLog("gameLayertouchMoved"); void GameLayer::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) //恢复一开始的position(gameLayerPosition(0,0)) CCMoveTo* move = CCMoveTo::create(1, gameLayerPosition); CCEaseIn* ease = CCEaseIn::create(move, 0.5f); ease- setTag(103); this- runAction(ease); CCLog("gameLayertouchEnded"); void GameLayer::addRandomThings() CCSize screenSize = CCDirector::sharedDirector()- getWinSize(); //向图层加太阳 for (int i=0; i i++) { CCSprite* firething = CCSprite::create("firething.png"); firething- setPosition(CCPointMake(CCRANDOM_0_1() * screenSize.width, CCRANDOM_0_1() * screenSize.height)); this- addChild(firething); this- runRandomMoveSequence(firething); //向图层加蜘蛛 for (int j=0; j j++) { //添加用CCNode封装了的Spider精灵，Spider具有触摸事件 Spider::spiderWithParentNode(this); void GameLayer::runRandomMoveSequence(CCNode* node) float duration = CCRANDOM_0_1() * 5 + 1; CCMoveBy* move1 = CCMoveBy::create(duration, CCPointMake(-180, 0)); CCMoveBy* move2 = CCMoveBy::create(duration, CCPointMake(0, -180)); CCMoveBy* move3 = CCMoveBy::create(duration, CCPointMake(180, 0)); CCMoveBy* move4 = CCMoveBy::create(duration, CCPointMake(0, 180)); CCSequence* sequence = (CCSequence*)CCSequence::create(move1,move2,move3,move4,NULL); CCRepeatForever* repeat = CCRepeatForever::create(sequence); node- runAction(repeat); }




2.其次实现下面的那个绿色草坪的图层 UserInterfaceLayer.h:

#ifndef _______UserInterfaceLayer__

#define _______UserInterfaceLayer__

#include iostream 

#include "cocos2d.h"

using namespace cocos2d;

class UserInterfaceLayer:public CCLayer

public:

 bool init();

 CREATE_FUNC(UserInterfaceLayer);

 bool isTouchForMe(CCPoint touchLocation);

 virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);

 virtual void ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent);

 virtual void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent);

 virtual void registerWithTouchDispatcher(void);

#endif /* defined(_______UserInterfaceLayer__) */

UserInterfaceLayer.cpp:
CCSize size = CCDirector::sharedDirector()- getWinSize(); CCSprite * background = CCSprite::create("ui-frame.png"); background- setPosition(CCPointMake(size.width/2, size.height)); background- setAnchorPoint(CCPointMake(0.5, 1)); this- addChild(background,0,101); CCLabelTTF* label = CCLabelTTF::create("Here be your Game Scores etc", "Courier", 22); label- setColor(ccBLACK); label- setPosition(CCPointMake(size.width/2, size.height)); label- setAnchorPoint(CCPointMake(0.5f, 1)); this- addChild(label); this- setTouchEnabled(true); return true; void UserInterfaceLayer::registerWithTouchDispatcher() CCDirector::sharedDirector()- getTouchDispatcher()- addTargetedDelegate(this, 0, false); //判断是否点击了我所在的范围 bool UserInterfaceLayer::isTouchForMe(CCPoint touchLocation) CCNode * node = this- getChildByTag(101); //boundBox方法是返回当前node所占的rect return node- boundingBox().containsPoint(touchLocation); bool UserInterfaceLayer::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) CCPoint location = pTouch- getLocation(); bool isTouchHandled = this- isTouchForMe(location); if (isTouchHandled) { CCNode * node = this- getChildByTag(101); ((CCSprite*)node)- setColor(ccRED);
GameLayer *gameLayer = HelloWorld::sharedhelloworld()- gameLayer(); CCRotateBy * rotate = CCRotateBy::create(16, 360); //gameLayer- runAction(rotate);
CCScaleTo * scale1 = CCScaleTo::create(8, 0); CCScaleTo *scale2 = CCScaleTo::create(8, 1); CCSequence* sequence = CCSequence::create(scale1,scale2,NULL); sequence- setTag(111); gameLayer- stopActionByTag(111); gameLayer- setRotation(0); gameLayer- setScale(1); gameLayer- runAction(rotate); gameLayer- runAction(sequence); return true; void UserInterfaceLayer::ccTouchMoved(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) CCNode* node = this- getChildByTag(101); ((CCSprite*)node)- setColor(ccGREEN); CCLog("uiLayertouchMoved"); void UserInterfaceLayer::ccTouchEnded(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) CCNode * node = this- getChildByTag(101); ((CCSprite*)node)- setColor(ccWHITE); CCLog("uiLayertouchEnded"); }
3.接着是一个带有触摸功能的Spider类 Spider.h:

#ifndef _______Spider__

#define _______Spider__

#include iostream 

#include "cocos2d.h"

using namespace cocos2d;

//CCLayer是默认继承了触摸协议的,这里蜘蛛类只要是继承CCNode类然后继承CCTargetedTouchDelegate

class Spider:public CCNode,public CCTargetedTouchDelegate

public:

 CCSprite* spiderSprite;

 int numUpdates;

 static Spider* spiderWithParentNode(CCNode* parentNode);

 bool initWithParentNode(CCNode* parentNode);


 void moveAway(float duration,CCPoint moveTo);

 virtual bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent);

#endif /* defined(_______Spider__) */

Spider.cpp:
//注意：要执行某个节点的scheduleUpdate方法必须要把它添加到层上去 parentNode- addChild(this);//this指当前具有触摸事件的node节点 CCSize screenSize = CCDirector::sharedDirector()- getWinSize(); spiderSprite = CCSprite::create("spider.png"); spiderSprite- setPosition(CCPointMake(CCRANDOM_0_1()*screenSize.width, CCRANDOM_0_1()*screenSize.height)); this- addChild(spiderSprite); //添加触摸事件 CCDirector* pDirector = CCDirector::sharedDirector(); pDirector- getTouchDispatcher()- addTargetedDelegate(this, -1, true); this- scheduleUpdate(); //点击蜘蛛随机移动 void Spider::moveAway(float duration, cocos2d::CCPoint moveTo) spiderSprite- stopAllActions(); CCMoveBy* move = CCMoveBy::create(duration, moveTo); spiderSprite- runAction(move); void Spider::update(float delta) numUpdates++; if (numUpdates 50) { numUpdates = 0; CCPoint moveTo = CCPointMake(CCRANDOM_0_1()*200 - 100, CCRANDOM_0_1()*100 - 50); this- moveAway(2, moveTo); bool Spider::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) CCPoint touchLocation = HelloWorld::locationFromTouch(pTouch); bool isTouchHandled = spiderSprite- boundingBox().containsPoint(touchLocation); if (isTouchHandled) { numUpdates = 0; CCPoint moveTo; float moveDistance = 60; //float rand = CCRANDOM_0_1(); if (CCRANDOM_0_1() 0.25f) moveTo = CCPointMake(moveDistance, moveDistance); else if (CCRANDOM_0_1() 0.5f) moveTo = CCPointMake(-moveDistance, moveDistance); else if(CCRANDOM_0_1() 0.75) moveTo = CCPointMake(moveDistance, -moveDistance); else moveTo = CCPointMake(-moveDistance, -moveDistance); this- moveAway(0.1f, moveTo); return isTouchHandled; return true; }

4.然后是合成界面，也就是主场景界面 HelloworldScene.h:

#ifndef __HELLOWORLD_SCENE_H__

#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"

#include "GameLayer.h" 

using namespace cocos2d;

class HelloWorld : public cocos2d::CCLayer

public:

 // Method init in cocos2d-x returns bool, instead of id in cocos2d-iphone (an object pointer)

 virtual bool init();

 // theres no id in cpp, so we recommend to return the class instance pointer

 static cocos2d::CCScene* scene();

 static CCPoint locationFromTouch(CCTouch* touch);

 // preprocessor macro for "static create()" constructor ( node() deprecated )

 CREATE_FUNC(HelloWorld);

 static HelloWorld* sharedhelloworld();

 GameLayer* gameLayer();

#endif // __HELLOWORLD_SCENE_H__

HelloWorldScene.cpp:
UserInterfaceLayer* userInterfaceLayer = UserInterfaceLayer::create(); this- addChild(userInterfaceLayer,2,202); return true; HelloWorld*HelloWorld::sharedhelloworld() return helloWorld; GameLayer*HelloWorld::gameLayer() CCNode * node = this- getChildByTag(201); return (GameLayer *)node; CCPoint HelloWorld::locationFromTouch(CCTouch* touch) return touch- getLocation(); } 源码下载：http://download.csdn.net/detail/s10141303/6247313
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