cocos2d-x 3.2 |飞机大战:碰撞与分数

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cocos2d-x 3.2 |碰撞与分数

前情提要：飞机大战第五篇实现碰撞与分数

思路：游戏里物体与物体的碰撞每帧都会检测这里我们利用前面讲过的贪吃蛇移动原理利用update方法来实时检测

如下：新建类----->Game

第一步：Game类(实现主要的游戏逻辑模块)

Game.h

//引入需要用到的类

#include <stdio.h>#include "cocos2d.h"#include "cocos-ext.h"#include "cocosGUI.h"#include "Bullet.h"#include "Enemy.h"#include "Boom.h"#include "Tool.h"USING_NS_CC;using namespace cocos2d;class Game:Layer{public:    Vector<Bullet *> allBullet;//集合:子弹    float startX,startY;    CREATE_FUNC(Game);    static Scene * CreateScene();    bool init();    virtual bool onTouchBegan(Touch *touch, Event *unused_event);//触摸检测 按下    virtual void onTouchMoved(Touch *touch, Event *unused_event);<span style="font-family: Arial, Helvetica, sans-serif;">//触摸检测 移动</span>    void newBullet(float t);//产生子弹    void moveBullet(float t);//移动子弹    Vector<Enemy *> allEnemy;//<span style="font-family: Arial, Helvetica, sans-serif;">集合:</span><span style="font-family: Arial, Helvetica, sans-serif;">敌机</span>    void newEnemy(float t);//产生敌机    void moveEnemy(float t);//移动敌机    void update(float t);//游戏逻辑 碰撞检测    int m_score;    void reCallBack(Ref * obj);    Vector<Tool *> allTool;//集合:道具};

Game.cpp

#include "Game.h"#include "BackGround.h"#include "Plane.h"#include "MainMenu.h"#include "SimpleAudioEngine.h"#include "cocosGUI.h"#include "GameOver.h"#include "Tool.h"#include "Enemy.h"using namespace ui;using namespace CocosDenshion;USING_NS_CC;Scene * Game::CreateScene(){    auto scene=Scene::create();    auto layer=Game::create();    scene->addChild(layer);    return scene;}bool Game::init(){    if (!Layer::init())    {        return false;    }        //创建 返回 按钮    auto menurt=MenuItemLabel::create(Label::createWithSystemFont("返回", "", 32),CC_CALLBACK_1(Game::reCallBack, this));    menurt->setAnchorPoint(Vec2::ZERO);    menurt->setPosition(600-30,Director::getInstance()->getWinSize().height-36);    menurt->setColor(Color3B::GREEN);        //创建菜单    auto menu=Menu::create(menurt,nullptr);    menu->setPosition(Vec2::ZERO);    this->addChild(menu,2);        //添加背景    auto bk=BackGround::create();    this->addChild(bk);    //添加飞机    auto fly1=Plane::create();    this->addChild(fly1,1);    fly1->moveTo(100,100);    fly1->setTag(10);        //处理飞机的HP    for (int i=0; i<fly1->hp; i++)    {        auto sphp=Sprite::create("hp_1.png");        sphp->setTag(1000+i);        this->addChild(sphp);        sphp->setAnchorPoint(Vec2(0,1));        sphp->setPosition(Vec2(i*sphp->getContentSize().width+3*i,Director::getInstance()->getWinSize().height));    }    //控制飞机飞行    auto listener=EventListenerTouchOneByOne::create();//创建侦听    listener->onTouchBegan=CC_CALLBACK_2(Game::onTouchBegan, this);//定义侦听的回调    listener->onTouchMoved=CC_CALLBACK_2(Game::onTouchMoved, this);    Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener, this);//将侦听添加到事件分发器中        //产生子弹 计划任务    this->schedule(schedule_selector(Game::newBullet),0.2);//每隔200毫秒产生一次子弹    this->schedule(schedule_selector(Game::moveBullet),0.01);        //产生敌机    this->schedule(schedule_selector(Game::newEnemy),1);    this->schedule(schedule_selector(Game::moveEnemy),0.01);        //实现游戏逻辑    this->scheduleUpdate();    //分数显示器1    this->m_score=0;    auto tscore=TextAtlas::create("0000", "img_num_dis.png",17 , 22, "0");    this->addChild(tscore,12);    tscore->setTag(210);    tscore->setPosition(Vec2(Director::getInstance()->getWinSize().width/2,                             Director::getInstance()->getWinSize().height-64));        //分数显示2//    auto scoreLb = Label::createWithSystemFont(StringUtils::format("分数：%d",score), "", 32);//    scoreLb->setAnchorPoint(Vec2::ZERO);//    scoreLb->setColor(Color3B::GREEN);//    scoreLb->setPosition(0,Director::getInstance()->getWinSize().height-36);//    scoreLb->setTag(123);//    this->addChild(scoreLb,2);    return true;}//返回主菜单void Game::reCallBack(Ref * obj){    auto scene=MainMenu::CreateScene();    Director::getInstance()->replaceScene(scene);}//按下bool Game::onTouchBegan(Touch *touch, Event *unused_event){    this->startX=touch->getLocation().x;    this->startY=touch->getLocation().y;    return true;}//移动void Game::onTouchMoved(Touch *touch, Event *unused_event){    float mx=touch->getLocation().x-startX;    float my=touch->getLocation().y-startY;    auto fly1=(Plane *)this->getChildByTag(10);    fly1->moveTo(fly1->px+mx, fly1->py+my);    this->startX=touch->getLocation().x;    this->startY=touch->getLocation().y;}void Game::newBullet(float t)//产生子弹{    auto fly1=(Plane *)this->getChildByTag(10);    Bullet * bt=Bullet::newBullet(1, 0,fly1->px,fly1->py);    allBullet.pushBack(bt);    this->addChild(bt);    //子弹音效    SimpleAudioEngine::getInstance()->playEffect("launch_1.wav");}void Game::moveBullet(float t)//移动子弹{    for (int i=0;i<allBullet.size();i++)    {        Bullet * nowB=allBullet.at(i);        nowB->moveTo(nowB->px, nowB->py+15);        if (nowB->py>Director::getInstance()->getWinSize().height)        {            allBullet.erase(i);            this->removeChild(nowB);            i--;        }    }    }void Game::newEnemy(float t){    int type=random()%10;    if (type < 3)    {        type = 1;    }    else if (type > 8)    {        type = 2;    }else    {        type = 1;    }    int ex=random()%(int)Director::getInstance()->getWinSize().width;    Enemy * news=Enemy::createEnemy(type, ex, Director::getInstance()->getWinSize().height+200);    allEnemy.pushBack(news);//将新产生的敌机添加到集合    this->addChild(news);   //在当前GAME图层添加敌机层}void Game::moveEnemy(float t){    for (int i=0; i<allEnemy.size(); i++)    {        //获取第i架敌机        Enemy * nowE=allEnemy.at(i);        nowE->moveTo(nowE->ex, nowE->ey-5);        if (nowE->ey<-nowE->eSprite->getContentSize().height)        {            allEnemy.erase(i);            this->removeChild(nowE);            i--;        }    }}void Game::update(float t){    //创建一个Label层 获取计数器标签    //auto scoreLb = (Label *)this->getChildByTag(123);    //碰撞检测    if (allEnemy.size()==0 || allBullet.size()==0)    {        return;    }    auto fly1=(Plane *)this->getChildByTag(10);    //判断飞机和道具    for (int j = 0; j<allTool.size(); j++)    {        //得到第j架敌机        Tool * nowTool=allTool.at(j);        Rect br(fly1->px,                fly1->py,                fly1->getChildByTag(10)->getContentSize().width,                fly1->getChildByTag(10)->getContentSize().height);        //敌机的矩形大小        Rect er(nowTool->tx,                nowTool->ty,                nowTool->sp->getContentSize().width,                nowTool->sp->getContentSize().height);        if (br.intersectsRect(er))        {//碰撞检测到两个矩形相交            //判断吃到哪种道具            switch (nowTool->type) {                case 1://hp                {                    fly1->hp++;                    int i=fly1->hp-1;                    auto sphp=Sprite::create("hp_1.png");                    sphp->setTag(1000+i);                    this->addChild(sphp);                    sphp->setAnchorPoint(Vec2(0,1));                    sphp->setPosition(Vec2(i*sphp->getContentSize().width+3*i,Director::getInstance()->getWinSize().height));                }                    break;                case 2://炸雷                {                    //所有敌机都销毁                    while (allEnemy.size()>0)                    {                        Enemy * nowEnemy=allEnemy.at(0);                        Boom * boom=Boom::createBoom(2, nowEnemy->ex, nowEnemy->ey);                        this->addChild(boom,10);                        //爆炸一次 总增加分数                        this->m_score+=300;                        allEnemy.eraseObject(nowEnemy);                        nowEnemy->removeFromParentAndCleanup(true);                    }                    //播放音效                    SimpleAudioEngine::getInstance()->playEffect("launch_1.wav");                    //播放爆炸粒子                    Boom *  boom=Boom::createBoom(2,                                               Director::getInstance()->getWinSize().width/2,                                               Director::getInstance()->getWinSize().height/2);                    this->addChild(boom,15);                }                                        break;                case 3://激光                                        break;                case 4://散弹                                        break;                                }            //敌机消失            nowTool->unscheduleAllSelectors();            nowTool->removeFromParentAndCleanup(true);            allTool.eraseObject(nowTool);            j--;        }        }        for (int j = 0; j<allEnemy.size(); j++)    {        //得到第j架敌机        Enemy * nowEnemy=allEnemy.at(j);        //子弹的矩形大小        Rect br(fly1->px,                fly1->py,                fly1->getChildByTag(10)->getContentSize().width,                fly1->getChildByTag(10)->getContentSize().height);        //敌机的矩形大小         Rect er(nowEnemy->ex,                nowEnemy->ey,                nowEnemy->eSprite->getContentSize().width,                nowEnemy->eSprite->getContentSize().height);        if (br.intersectsRect(er))        {//碰撞检测到两个矩形相交            //敌机消失            allEnemy.eraseObject(nowEnemy);            nowEnemy->removeFromParentAndCleanup(true);            j--;            //掉血音效            SimpleAudioEngine::getInstance()->playEffect("skill_1.wav");            //我方Hp--            if (fly1->hp>0)            {                this->removeChildByTag(1000+fly1->hp-1);                fly1->hp=fly1->hp-1;            }            if(fly1->hp<=0)            {//Game Over                //创建一个场景                auto scene=GameOver::createScene();                                //将场景覆盖到Game Over 并释放之前场景                Director::getInstance()->replaceScene(scene);            }        }    }    //判断子弹 是否碰到敌机    for (int i=0; i<allBullet.size(); i++)    {                //得到第i颗子弹        Bullet * nowBullet=allBullet.at(i);        for (int j = 0; j<allEnemy.size(); j++)        {            //得到第j架敌机            Enemy * nowEnemy=allEnemy.at(j);            //子弹的矩形大小            Rect br(nowBullet->px,                    nowBullet->py,                    nowBullet->bt->getContentSize().width,                    nowBullet->bt->getContentSize().height);            //敌机的矩形大小            Rect er(nowEnemy->ex,                    nowEnemy->ey,                    nowEnemy->eSprite->getContentSize().width,                    nowEnemy->eSprite->getContentSize().height);            if (br.intersectsRect(er))            {                    //检测到两个矩形相交 子弹消失                    allBullet.eraseObject(nowBullet);                    nowBullet->removeFromParentAndCleanup(true);                    i--;                    nowEnemy->hp=nowEnemy->hp-1;                    if(nowEnemy->hp<=0)                    {                        //爆炸                        if(nowEnemy->type==1)                        {                            Boom * boom=Boom::createBoom(1, nowEnemy->ex, nowEnemy->ey);                            this->addChild(boom);                            //scoreLb->setString(StringUtils::format("分数：%d",score+=40));                            //增加分数                            this->m_score+=40;                        }                        else                        {                            Boom * boom=Boom::createBoom(2, nowEnemy->ex, nowEnemy->ey);                            this->addChild(boom);                            //scoreLb->setString(StringUtils::format("分数：%d",score+=60));                            this->m_score+=60;                        }                        //分数增加器                        auto score1=(TextAtlas *)this->getChildByTag(210);                        score1->setString(StringUtils::format("%d",m_score));                                                //爆炸音效                        SimpleAudioEngine::getInstance()->playEffect("launch_2.wav");                                                //道具处理                        if (nowEnemy->toolID>0) {                            //掉落道具                            auto tool=Tool::newTool(nowEnemy->toolID,nowEnemy->ex,nowEnemy->ey);                            this->addChild(tool);                            allTool.pushBack(tool);                        }                                                allEnemy.eraseObject(nowEnemy);                        nowEnemy->removeFromParentAndCleanup(true);                        j--;                                            }                    break;//退出这次循环            }        }    }}

总结：至此利用5个篇章简单实现了一下飞机大战的主要核心内容，希望对读者有帮

后期还有两个番外篇：游戏分数保存+安卓导出调试(因为安卓实在是让人蛋疼)

ps：游戏中用到的素材与音效请自行替换。

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