cocos2d-x 3.2 |飞机大战:背景与滚动

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五篇介绍飞机大战实现过程

前情提要第一篇：背景与滚动

如下：新建项目---->类----->BackGround

BackGround.h

#include <stdio.h>#include "cocos2d.h"using namespace cocos2d;class BackGround:public Node{public:    CREATE_FUNC(BackGround);    //create方法会调用init    bool init();    void update(float t);    int count;};

BackGround.cpp

#include "BackGround.h"#include "cocos2d.h"using namespace cocos2d;bool BackGround::init(){    if (!Node::init()) {        return false;    }    //添加背景图片    auto Gamebk=Sprite::create("xxxx.jpg");    Gamebk->setTag(10);    //设定背景层锚点 坐标 并添加到当前场景    Gamebk->setAnchorPoint(Vec2(0,0));    Gamebk->setPosition(Vec2(0,0));    this->addChild(Gamebk);    //添加滚动背景层 锚点 坐标 添加到当前场景 标签    auto Gamebk1=Sprite::create("xxxx.jpg");    Gamebk1->setAnchorPoint(Vec2(0,0));    Gamebk1->setPosition(Vec2(0,0));    this->addChild(Gamebk1);    Gamebk1->setTag(11);        //计划任务:滚动贴图    this->scheduleUpdate();        //添加云彩图片    auto Clouds=Sprite::create("xxxxx.png");    Clouds->setScale(0.3, 0.3);    this->addChild(Clouds);    Clouds->setTag(13);    Clouds->setAnchorPoint(Vec2::ZERO);    //随机生成云彩位置    int px=rand()%(int)Director::getInstance()->getWinSize().width;    int py=rand()%(int)Clouds->getContentSize().height+Director::getInstance()->getWinSize().height;    //CCLOG("%d %d ",px,py);    Clouds->setPosition(px, py);    count=0;    return true;}void BackGround::update(float t){    //移动云彩逻辑    count=count+1;    if (count>1)    {        auto Clouds=this->getChildByTag(13);        Clouds->setPositionY(Clouds->getPositionY()-2);        if (Clouds->getPositionY()<-Clouds->getContentSize().height)        {//            Clouds->setPositionY(//                Director::getInstance()->getWinSize().height+Clouds->getContentSize().height);            int px=rand()%(int)Director::getInstance()->getWinSize().width;            int py=rand()%(int)Clouds->getContentSize().height+Director::getInstance()->getWinSize().height;            Clouds->setPosition(px, py);        }    }    //移动背景逻辑    auto Gamebk=this->getChildByTag(10);    auto Gamebk1=this->getChildByTag(11);        Gamebk->setPositionY(Gamebk->getPositionY()-1);    Gamebk1->setPositionY(Gamebk->getPositionY()+Gamebk->getContentSize().height);    if (Gamebk1->getPositionY()<=0)    {        Gamebk->setPositionY(Gamebk1->getPositionY());    }}

总结：实现了背景、背景滚动、云彩、云彩随机出生+移动。

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