矩形碰撞
新建工程，RectCollision
修改HelloWorldScene.h
#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__
#include "cocos2d.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();
// there's no 'id' in cpp, so we recommend to return the class instance pointer
static cocos2d::CCScene* scene();
// preprocessor macro for "static create()" constructor ( node() deprecated )
CREATE_FUNC(HelloWorld);
virtual void onEnter();
virtual void onExit();
virtual bool ccTouchBegan(CCTouch *pTouch,CCEvent *pEvent);
virtual void ccTouchMoved(CCTouch *pTouch,CCEvent *pEvent);
virtual void ccTouchEnded(CCTouch *pTouch,CCEvent *pEvent);
bool isRectCollision(CCRect rect1,CCRect rect2);
};
#endif // __HELLOWORLD_SCENE_H__
修改HelloWorldScene.cpp
#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"
using namespace cocos2d;
using namespace CocosDenshion;
#define collisionMacro 2
CCScene* HelloWorld::scene()
{
// 'scene' is an autorelease object
CCScene *scene = CCScene::create();
// 'layer' is an autorelease object
HelloWorld *layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !CCLayer::init() )
{
return false;
}
CCLayerColor *colorLayer=CCLayerColor::create(ccc4(255, 255, 255, 255),480,320);
addChild(colorLayer);
CCLabelTTF *pLabel=CCLabelTTF::create("~还米有碰撞", "Thonburi", 24);
pLabel->setColor(ccc3(255, 0, 0));
CCSize size=CCDirector::sharedDirector()->getWinSize();
pLabel->setPosition(ccp(size.width*0.5,size.height-50));
this->addChild(pLabel,1,900);
CCSprite *sp1=CCSprite::create("rect1.png");
sp1->setPosition(ccp(100,230));
addChild(sp1,0,921);
CCSprite *sp2=CCSprite::create("rect2.png");
sp2->setPosition(ccp(240, 140));
addChild(sp2,0,922);
return true;
}
void HelloWorld::onEnter()
{
CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this, 0, false);
CCLayer::onEnter();
}
void HelloWorld::onExit()
{
CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this);
CCLayer::onExit();
}
bool HelloWorld::ccTouchBegan(CCTouch *pTouch,CCEvent *pEvent)
{
CCSprite *sp1=(CCSprite*) this->getChildByTag(921);
sp1->setPosition(pTouch->getLocation());
return true;
}
void HelloWorld::ccTouchMoved(CCTouch *pTouch,CCEvent *pEvent)
{
CCSprite *sp1=(CCSprite*) this->getChildByTag(921);
sp1->setPosition(pTouch->getLocation());
CCSprite *sp2=(CCSprite*) this->getChildByTag(922);
CCLabelTTF *pLabel=(CCLabelTTF*) this->getChildByTag(900);
switch (collisionMacro) {
case 1:
{
//利用自定义函数碰撞
if (this->isRectCollision(CCRectMake(sp1->getPositionX(), sp1->getPositionY(), sp1->getContentSize().width, sp1->getContentSize().height), CCRectMake(sp2->getPositionX(), sp2->getPositionY(), sp2->getContentSize().width, sp2->getContentSize().height))) {
pLabel->setString("碰撞拉！");
}
else
{
pLabel->setString("还没有碰撞！");
}
}
break;
case 2:
{
//利用intersectsRect函数碰撞
if (sp1->boundingBox().intersectsRect(sp2->boundingBox())) {
pLabel->setString("碰撞拉！");
}
else
{
pLabel->setString("还没有碰撞！");
}
}
break;
default:
break;
}
}
void HelloWorld::ccTouchEnded(CCTouch *pTouch,CCEvent *pEvent)
{
}
bool HelloWorld::isRectCollision(CCRect rect1,CCRect rect2)
{
float x1=rect1.origin.x;
float y1=rect1.origin.y;
float w1=rect1.size.width;
float h1=rect1.size.height;
float x2=rect2.origin.x;
float y2=rect2.origin.y;
float w2=rect2.size.width;
float h2=rect2.size.height;
if (x1+w1*0.5<x2-w2*0.5)
{
return false;
}
else if(x1-w1*0.5>x2+w2*0.5)
{
return false;
}
else if(y1+h1*0.5<y2-h2*0.5)
{
return false;
}
else if(y1-h1*0.5>y2+h2*0.5)
{
return false;
}
return true;
}