[Cocos2Dx-一个都不能死]3.添加游戏人物对象

当给游戏页面添加了边界框后，下一步就是在边框内添加游戏角色！其中包括游戏人物对象，是一个动画，其中需要使用到flash，另外一个就是游戏的滑块对象，其中滑块对象是自动运动的，下面我们先添加人物对象！

新建一个Hero.h头文件继承自Sprite精灵类，并新建一个Hero类，里面创建一个人物对象，并声明初始化方法

class Hero :public Sprite
 {
 private:
 public:
 virtual bool init();
 CREATE_FUNC(Hero);
 };

因为人物是有动画的，所以需要借助Flash来生成两个文件,动作描述的json文件和图片文件

Paste_Image.png

Hero.png

{"frames": {
 
 
"hero0000":
 {
 "frame": {"x":0,"y":0,"w":44,"h":52},
 "rotated": false,
 "trimmed": false,
 "spriteSourceSize": {"x":0,"y":0,"w":44,"h":52},
 "sourceSize": {"w":44,"h":52}
 },
 "hero0001":
 {
 "frame": {"x":44,"y":0,"w":42,"h":52},
 "rotated": false,
 "trimmed": true,
 "spriteSourceSize": {"x":2,"y":0,"w":44,"h":52},
 "sourceSize": {"w":44,"h":52}
 },
 "hero0002":
 {
 "frame": {"x":86,"y":0,"w":42,"h":52},
 "rotated": false,
 "trimmed": true,
 "spriteSourceSize": {"x":2,"y":0,"w":44,"h":52},
 "sourceSize": {"w":44,"h":52}
 },
 "hero0003":
 {
 "frame": {"x":0,"y":52,"w":42,"h":52},
 "rotated": false,
 "trimmed": true,
 "spriteSourceSize": {"x":2,"y":0,"w":44,"h":52},
 "sourceSize": {"w":44,"h":52}
 },
 "hero0004":
 {
 "frame": {"x":42,"y":52,"w":42,"h":52},
 "rotated": false,
 "trimmed": true,
 "spriteSourceSize": {"x":2,"y":0,"w":44,"h":52},
 "sourceSize": {"w":44,"h":52}
 }},
 "meta": {
 "app": "Adobe Flash Professional",
 "version": "13.1.0.226",
 "image": "Hero.png",
 "format": "RGBA8888",
 "size": {"w":128,"h":128},
 "scale": "1"
 }
 }
 

我们需要写一个解析Json数据的工具类，代码如下：

 Animate * FlashTool::readJsonSpriteSheet(std::string jsonFile,float delayPerUnit){
 
 
rapidjson::Document doc;
std::string fileContent = FileUtils::getInstance()->getStringFromFile(jsonFile);
fileContent.erase(0,fileContent.find_first_of('{'));

doc.Parse<0>(fileContent.c_str());

std::string imgFileName = doc["meta"]["image"].GetString();

auto &frames = doc["frames"];
auto sfc = SpriteFrameCache::getInstance();

Vector animFrames;
for (auto m=frames.MemberBegin(); m!=frames.MemberEnd(); m++) {
    auto frameName = m->name.GetString();
    auto & frameProperties = m->value["frame"];
    auto & spriteSourceSize = m->value["spriteSourceSize"];
    
    auto sf = sfc->getSpriteFrameByName(frameName);
    if (!sf) {
        sf = SpriteFrame::create(imgFileName, Rect(frameProperties["x"].GetInt(), frameProperties["y"].GetInt(), frameProperties["w"].GetInt(), frameProperties["h"].GetInt()), m->value["rotated"].GetBool(), Vec2(spriteSourceSize["x"].GetInt(), spriteSourceSize["y"].GetInt()), Size(spriteSourceSize["w"].GetInt(), spriteSourceSize["h"].GetInt()));
        sfc->addSpriteFrame(sf, frameName);
    }
    animFrames.pushBack(AnimationFrame::create(sf, delayPerUnit, ValueMapNull));
}

Animation * animation = Animation::create(animFrames,delayPerUnit);
return Animate::create(animation);
 
 
}
 

如何应用呢？

之后，我们在Hero.cpp里面来实现人物对象的初始化

bool Hero::init() {
 Sprite::init();
 Size herobox = Size(44, 52);//设置任务的宽高
 
 
//限制宽高
setContentSize(herobox);
setPhysicsBody(PhysicsBody::createBox(herobox));

//设置锚点
setAnchorPoint(Point(0, 0));
getPhysicsBody()->setRotationEnable(false);

//添加碰撞检测
getPhysicsBody()->setContactTestBitmask(1);

action = RepeatForever::create(FlashTool::readJsonSpriteSheet(“Hero.png”, 0.2f));
runAction(action);
return true;
 
 
}

最后我们把Hero对象放入Scene里面

hero = Hero::create();
 hero->setPosition(30, positionY);
 addChild(hero);
 

这样，我们就实现了一个人物的动画效果！

项目git地址：https://github.com/marco115/NoOneDies.git
对文章有什么优化改进的地方，请留言！谢谢大家