2015-6-20求整数的绝对值，碰撞检测，游戏结束时，回掉“back to menu",操作方法

C语言

函数名： abs

功 能： 求整数的绝对值

头文件：stdlib.h

函数原型：int abs(int i);

2// 碰撞检测

bool GameMain::isCollion(CCPoint p1, CCPoint p2, int w1, int h1, int w2, int h2)

{

//判断两个矩形是否碰撞

if (abs(p1.x - p2.x) < w1 + w2 && abs(p1.y - p2.y) < h1 + h2)

{

return true;

}

return false;

}

void GameMain::update(float time)

{

CCPoint hpos = hero->getPosition();

// 碰撞检测

for (int i = 0; i < 3; i++)

{

GameObjEnemy
*enemy = (GameObjEnemy*)enemys->objectAtIndex(i);
// sjt

CCPoint epos = enemy->getPosition();

if(enemy->islife)
// 敌人是否活着

{

for(int i = 0; i < bullets->capacity(); i++)
// bullets（主角子弹）

{

if(((GameHeroBullet*)bullets->objectAtIndex(i))->getIsvisble())

{

if(isCollion(((GameHeroBullet*)bullets->objectAtIndex(i))->getPosition(), epos, 5, 13, 21, 28))
// 敌人和主角子弹碰撞检测

{

enemy->setdie();

gamemark->addnumber(200);
// ahui

break;

}

}

}

}// endif(enemy->islife)
// 敌人是否活着

if (!isreduce && enemy->islife && isCollion(hpos, epos, 21, 22.5, 21, 28)){

// 敌人和主角碰撞检测

enemy->setdie();

setherohurt();

}

}

//主角和敌人子弹碰撞

if (!isreduce){

for (int i = 0; i < enemybullets->capacity(); i++){

if (isCollion(hpos, ((GameEnemyBullet*)enemybullets->objectAtIndex(i))->getPosition(), 21, 22.5, 5, 13)){

setherohurt();

}

}

}

}

3// 游戏结束时，回掉“back to menu",操作方法

bool GameMain::init(){

//初始化游戏结束弹板及按钮

gameover = CCSprite::create("gameover.png");

gameover->setAnchorPoint(ccp(0.5, 0.5));

gameover->setPosition(ccp(0, 0));

gameover->setPosition(ccp(size.width / 2, size.height / 2 + 70));

gameover->setVisible(false);

gameover->setScale(0.5);

addChild(gameover, 5);

CCMenuItemImage *pCloseItem = CCMenuItemImage::create("back.png", "back.png",

this, menu_selector(GameMain::menuBackCallback));

//正常状态的图片 //按下去时的图片

pCloseItem->setPosition(ccp(size.width / 2, size.height / 2 - 50));

pCloseItem->setScale(0.5);

CCMenu
*pMenu = CCMenu::create(pCloseItem, NULL);

this->addChild(pMenu, 5, 25);// void addChild(CCNode * child, int zOrder, int tag)

pMenu->setVisible(true);

pMenu->setEnabled(false);

}

void GameMain::setover(){

//设置游戏结束

CCMenu
*pMenu = (CCMenu*)this->getChildByTag(25);

pMenu->setVisible(true);

pMenu->setEnabled(true);

gameover->setVisible(true);

gameover->setScale(0);

pMenu->setScale(0);

pMenu->runAction(CCScaleTo::create(0.5, 1));

gameover->runAction(CCScaleTo::create(0.5, 0.5));

}

4//

CCScaleTo与CCScaleBy比较

CCScaleTo的create函数：

?
CCScaleBy的create函数：

?
5//

error LNK2001: 无法解析的外部符号 "class cocos2d::Vec2 const cocos2d::CCPointZero" (?CCPointZero@cocos2d@@3VV

//pMenu->setPosition(CCPointZero); //sjt

pMenu->setPosition(ccp(0, 0));

6//

CCPointZero
= CCPointMake(0,0);

7//

CCBlink

// 作用 :创建一额闪烁的动作

// 参数1：闪烁完成的时间

// 参数2:闪烁的次数

// CCActionInterval * blink = CCBlink ::create(3, 10);

// sp->runAction(blink);

7// AppDelegate::applicationDidFinishLaunching()

bool AppDelegate::applicationDidFinishLaunching() {

// initialize director

auto director = Director::getInstance();

auto glview = director->getOpenGLView();

if(!glview) {

// glview = GLViewImpl::create("My Game");

glview = GLViewImpl::createWithRect("MyMiaoxinWar", Rect(0, 0, 320, 480));// 初始化界面

director->setOpenGLView(glview);

}

// 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);

// create a scene. it's an autorelease object

// auto scene = HelloWorld::createScene();

auto scene = GameMenu::scene();// GameMenuScene Classs

// run

director->runWithScene(scene);

return true;

}