【cocos2d-x】一个运动的小球

李掌柜

这个帖子是笔记，有想用C或C++语言开发游戏的可以加这个
掌柜的创的Cocos2d-x 学习群：153412944

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C++代码：

//HelloWorldScene.h
#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__
#include "cocos2d.h"
class HelloWorld : public cocos2d:ayerColor
{
public:
    // there's no 'id' in cpp, so we recommend returning the class instance pointer
    static cocos2d::Scene* createScene();
    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
    virtual bool init();
    virtual void HelloWorld::update(float dt);
    // implement the "static create()" method manually
    CREATE_FUNC(HelloWorld);
private:
    cocos2d::Sprite * ball;
};
#endif // __HELLOWORLD_SCENE_H__
//HelloWorldScene.cpp
#include "HelloWorldScene.h"
#include "cocostudio/CocoStudio.h"
#include "ui/CocosGUI.h"
USING_NS_CC;
using namespace cocostudio::timeline;
Scene* HelloWorld::createScene()
{
    // 'scene' is an autorelease object
    auto scene = Scene::create();

    // 'layer' is an autorelease object
    auto 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()
{
    Size visibleSize = Director::getInstance()->getVisibleSize();
    Vec2 orign = Director::getInstance()->getVisibleOrigin();

    //////////////////////////////
    // 1. super init first
    if ( !LayerColor::initWithColor(Color4B(255,255,255,255)))
    {
        return false;
    }

    ball = Sprite::create("ball.jpg");
    ball->setPosition(200,400);
    addChild(ball);
    scheduleUpdate();
    return true;
}
void HelloWorld::update(float dt)
{
    Size visibleSize = Director::getInstance()->getVisibleSize();
    ball->setPositionX (ball->getPositionX() + 3);
    if(ball->getPositionX() > visibleSize.width + ball->getContentSize().width / 2 )
    {
        //ball->setPositionX(-ball->getContentSize().width / 2);
        ball->setPositionX(getPositionX()+3);
    }
}