Cocos2d-x 3.6 项目实战---贪吃蛇（4）_app

概述现在就是最主要也是较为复杂的界面和逻辑类了。他实际包含两个类，一个SnakeNode蛇结点类和一个Game界面逻辑类。绘制10*10的网格，初始化一个食物和一个蛇头，随机的坐标，然后定时移动蛇头，碰到食物则吃掉并产生一个身体结点，碰撞检测，到边界就结束返回主界面。 GameScene.h: #pragma execution_character_set("utf-8")#ifndef __

现在就是最主要也是较为复杂的界面和逻辑类了。

他实际包含两个类，一个SnakeNode蛇结点类和一个Game界面逻辑类。
绘制10*10的网格，初始化一个食物和一个蛇头，随机的坐标，然后定时移动蛇头，碰到食物则吃掉并产生一个身体结点，碰撞检测，到边界就结束返回主界面。
GameScene.h:

#pragma execution_character_set("utf-8")#ifndef __snakegame__GameScene__#define __snakegame__GameScene__#include "cocos2d.h"USING_NS_CC;enum class ENUM_DIR{    DIR_UP,DIR_DOWN,DIR_left,DIR_RIGHT,DIR_Stop};class SnakeNode:public Sprite{public:    ENUM_DIR m_dir;     //移动方向    int nodeType;       //节点类型： 1蛇头 2 身体 3 食物    int m_row,m_col;    //当前节点的行列坐标public:    static SnakeNode* create(int type);//!!!    virtual bool init(int type);    voID setpositionRC(int row,int col);//设置节点的坐标};class Game:public Layer{public:    //enum RESolUTION{    // NET_SIZE = 64,    // NET_WIDTH = 640    // _WIDTH = 960,    // _HEIGHT = 640    //};    SnakeNode * spFood;//食物    SnakeNode * sphead;//蛇头    int m_score;    Vector<SnakeNode *> allBody;//身体!!!    static Scene * createScene();    CREATE_FUNC(Game);    virtual bool init();public:    voID menuCallBack(Ref * object);    voID gameLogic(float t);    voID newBody();//添加一个新的身体节点    voID moveBody();//移动所有的身体节点};#endif /* defined(__snakegame__GameScene__) */

GameScen.cpp:

#include "GameScene.h"#include "MainMenu.h"#include "SimpleAudioEngine.h"using namespace CocosDenshion;Scene * Game::createScene(){    auto scene = Scene::create();    auto layer = Game::create();    scene->addChild(layer);    return scene;}SnakeNode* SnakeNode::create(int type){    SnakeNode *pRet = new SnakeNode();    if (pRet && pRet->init(type))    {        pRet->autorelease();        return pRet;    }    else    {        delete pRet;        pRet = NulL;        return NulL;    }}bool SnakeNode::init(int type){    if (!Sprite::init())    {        return false;    }    ///根据类型不同初始化不同的纹理    switch (type) {        case 1://蛇头        {            auto sprite = Sprite::create("redstar.png");            sprite->setAnchorPoint(Point::ZERO);            this->addChild(sprite);            m_dir = ENUM_DIR::DIR_RIGHT;//向右移动            m_row = 0;//初始化蛇头的位置            m_col = 0;        }        break;        case 2://身体        {            auto sprite = Sprite::create("greenstar.png");            sprite->setAnchorPoint(Point::ZERO);            this->addChild(sprite);        }        m_dir = ENUM_DIR::DIR_Stop;        break;        case 3://食物        {            auto sprite = Sprite::create("yellowstar.png");            sprite->setAnchorPoint(Point::ZERO);            this->addChild(sprite);        }        m_dir = ENUM_DIR::DIR_Stop;        break;        default:        break;    }    return true;}enum RESolUTION{    NET_SIZE = 32,NET_WIDTH = 320};voID SnakeNode::setpositionRC(int row,int col)//设置节点的坐标{    this->m_row = row;    this->m_col = col;    setposition(Point(col * NET_SIZE,row * NET_SIZE));}bool  Game::init(){    if (!Layer::init())    {        return  false;    }    //添加地图网格    auto draw = DrawNode::create();    draw->setAnchorPoint(Point::ZERO);    draw->setposition(Point::ZERO);    this->addChild(draw);    for (int i = 0; i < 11; i++)    {        draw->drawSegment(Point(0,NET_SIZE * i),Point(NET_WIDTH,1,color4F(1,1));        draw->drawSegment(Point(NET_SIZE * i,0),Point(NET_SIZE * i,NET_WIDTH),1));    }    //添加蛇头    sphead = SnakeNode::create(1);      this->addChild(sphead);    //添加身体    //添加食物    spFood = SnakeNode::create(3);    //float i = CCRANDOM_0_1()*(end - start + 1) + start;    int row = rand() % 10;    int col = rand() % 10;    spFood->setpositionRC(row,col);    this->addChild(spFood);    auto size = Director::getInstance()->getWinSize();    //添加背景    auto spriteBK = Sprite::create("menuback.png");    spriteBK->setposition(Point(size.wIDth / 2,size.height / 2));    spriteBK->setopacity(75);    this->addChild(spriteBK);    //分数显示    m_score = 0;    auto labelscore = Label::createWithSystemFont("分数: 0","宋体",25);    //auto labelscore = Label::createWithSystemFont("score: 0","AdobeHeitiStd-Regular",25);    labelscore->setTag(110);    labelscore->setposition(Point(size.wIDth - 80,size.height - 50));    this->addChild(labelscore);    //返回按钮    auto menuItemBack = MenuItemFont::create("Back",CC_CALLBACK_1(Game::menuCallBack,this));    auto menu = Menu::create(menuItemBack,NulL);    menu->setposition(Point::ZERO);    menuItemBack->setposition(Point(size.wIDth - menuItemBack->getContentSize().wIDth - 50,menuItemBack->getContentSize().height + 10));    this->addChild(menu);    //计划任务    this->schedule(schedule_selector(Game::gameLogic),0.5f);    //加入用户触摸事件侦听    auto Listener = EventListenertouchOneByOne::create();    Listener->setSwallowtouches(true);    Listener->ontouchBegan = [&](touch * t,Event * e){        //改变贪食蛇移动的方向        int col = t->getLocation().x / NET_SIZE;        int row = t->getLocation().y / NET_SIZE;        int spheadCol = sphead->getpositionX() / NET_SIZE;        int spheadRow = sphead->getpositionY() / NET_SIZE;        if (abs(spheadCol - col) > abs(spheadRow - row))//左右        {            if (spheadCol < col)//点击右方            {                sphead->m_dir = ENUM_DIR::DIR_RIGHT;            }            else            {                sphead->m_dir = ENUM_DIR::DIR_left;            }        }        else//上下        {            if (spheadRow < row)//点击上方            {                sphead->m_dir = ENUM_DIR::DIR_UP;            }            else            {                sphead->m_dir = ENUM_DIR::DIR_DOWN;            }        }        return true;    };    _eventdispatcher->addEventListenerWithSceneGraPHPriority(Listener,this);    return true;}voID  Game::menuCallBack(Ref * object){    auto scene = MainMenu::createScene();    Director::getInstance()->replaceScene(scene);}voID Game::gameLogic(float t){    moveBody();//移动所有身体节点    //蛇头移动    switch (sphead->m_dir) {        case ENUM_DIR::DIR_RIGHT:        sphead->runAction(MoveBy::create(0.3f,Point(NET_SIZE,0)));        sphead->m_coL++;        break;        case ENUM_DIR::DIR_left:        sphead->runAction(MoveBy::create(0.3f,Point(-NET_SIZE,0)));        sphead->m_col--;        break;        case ENUM_DIR::DIR_DOWN:        sphead->runAction(MoveBy::create(0.3f,Point(0,-NET_SIZE)));        sphead->m_row--;        break;        case ENUM_DIR::DIR_UP:        sphead->runAction(MoveBy::create(0.3f,NET_SIZE)));        sphead->m_row++;        break;        default:        break;    }    //add Todo    if (sphead->m_row < 0 || sphead->m_col < 0 ||        sphead->m_row > 9 || sphead->m_col > 9)    {        auto scene = MainMenu::createScene();        Director::getInstance()->replaceScene(scene);    }    //碰撞检测    if (sphead->m_row == spFood->m_row&&        sphead->m_col == spFood->m_col)    {  //音效的播放        SimpleAudioEngine::getInstance()->playEffect("eat.wav");        //分数增加        this->m_score += 100;        auto label = (Label *)this->getChildByTag(110);        char strscore[20];        sprintf(strscore,"分数: %d",m_score);        label->setString(strscore);        //食物产生新的位置        int row = rand() % 10;//0-9        int col = rand() % 10;        spFood->setpositionRC(row,col);        //添加节点        newBody();    }}voID Game::newBody()//添加一个新的身体节点{    auto bodynode = SnakeNode::create(2);    //设置这个节点的方向和坐标    if (allBody.size() > 0)//有身体节点    {   //新节点的方向为最后一个身体的节点        auto lastbody = allBody.at(allBody.size() - 1);        bodynode->m_dir = lastbody->m_dir;        switch (bodynode->m_dir) {            case ENUM_DIR::DIR_UP:            bodynode->setpositionRC(lastbody->m_row - 1,lastbody->m_col);            break;            case ENUM_DIR::DIR_DOWN:            bodynode->setpositionRC(lastbody->m_row + 1,lastbody->m_col);            break;            case ENUM_DIR::DIR_left:            bodynode->setpositionRC(lastbody->m_row,lastbody->m_col + 1);            break;            case ENUM_DIR::DIR_RIGHT:            bodynode->setpositionRC(lastbody->m_row,lastbody->m_col - 1);            break;            default:            break;        }    }    else    { //新节点的方向等于蛇头的方向        bodynode->m_dir = sphead->m_dir;        switch (bodynode->m_dir) {            case ENUM_DIR::DIR_UP:            bodynode->setpositionRC(sphead->m_row - 1,sphead->m_col);            break;            case ENUM_DIR::DIR_DOWN:            bodynode->setpositionRC(sphead->m_row + 1,sphead->m_col);            break;            case ENUM_DIR::DIR_left:            bodynode->setpositionRC(sphead->m_row,sphead->m_col + 1);            break;            case ENUM_DIR::DIR_RIGHT:            bodynode->setpositionRC(sphead->m_row,sphead->m_col - 1);            break;            default:            break;        }    }    //添加节点到当前图层    this->addChild(bodynode);    //添加节点到集合中    allBody.pushBack(bodynode);}voID Game::moveBody()//移动所有的身体节点{    if (allBody.size() == 0){ return; }    for (auto bodynode : allBody)    {        switch (bodynode->m_dir) {            case ENUM_DIR::DIR_RIGHT:            bodynode->runAction(MoveBy::create(0.3f,0)));            bodynode->m_coL++;            break;            case ENUM_DIR::DIR_left:            bodynode->runAction(MoveBy::create(0.3f,0)));            bodynode->m_col--;            break;            case ENUM_DIR::DIR_DOWN:            bodynode->runAction(MoveBy::create(0.3f,-NET_SIZE)));            bodynode->m_row--;            break;            case ENUM_DIR::DIR_UP:            bodynode->runAction(MoveBy::create(0.3f,NET_SIZE)));            bodynode->m_row++;            break;            default:            break;        }    }    //移动完成之后，改变每个body的方向    for (int i = allBody.size() - 1; i > 0; i--)    { //每个节点的 方向调整为它前一个节点的方向        allBody.at(i)->m_dir = allBody.at(i - 1)->m_dir;    }    allBody.at(0)->m_dir = sphead->m_dir;}