3.2简单摇杆上下左右-创新互联

#ifndef _HROCKER_H_
#define _HROCKER_H_
#include "cocos2d.h"

USING_NS_CC;
//用于标识摇杆与摇杆的背景
typedef enum tagForHRocker
{
    tag_rocker,
    tag_rockerBG
};

//用于标识摇杆方向
typedef enum{
    rocker_stay,
    rocker_right,
    rocker_up,
    rocker_left,
    rocker_down,
}tagDirecton;
class HRocker:public Layer{

public:
    HRocker(void);
    ~HRocker(void);
    virtual bool init();
    //创建摇杆(摇杆的操作题图片资源名，摇杆背景图片资源名，起始坐标)
    static HRocker* createHRocker(const char *rockerImageName,const char *rockerBGImageName,Point position);
    //启动摇杆(显示摇杆、监听摇杆触屏事件)
    void startRocker(bool _isStopOther);
    //停止摇杆(隐藏摇杆，取消摇杆的触屏监听)
    void stopRocker();
    //判断控制杆方向，用来判断精灵上、下、左、右运动
    int rocketDirection;
    //当前人物行走方向,用来判断精灵的朝向，精灵脸朝右还是朝左
    bool rocketRun;
    void update(float dt);
    CREATE_FUNC(HRocker);

    EventListenerTouchOneByOne* listener;
private:
    //自定义初始化函数
    void rockerInit(const char* rockerImageName,const char* rockerBGImageName,Point position);
    //是否可操作摇杆
    bool isCanMove;
    //获取当前摇杆与用户触屏点的角度
    float getRad(Point pos1,Point pos2);
    //摇杆背景的坐标
    Point rockerBGPosition;
    //摇杆背景的半径
    float rockerBGR;
    //触屏事件
    virtual bool onTouchBegan(Touch *pTouch, Event *pEvent);
    virtual void onTouchMoved(Touch *pTouch, Event *pEvent);
    virtual void onTouchEnded(Touch *pTouch, Event *pEvent);
};
#endif

******************************************************

#include "HRocker.h"
#include "Hero.h"
const double PI=3.1415;
HRocker::HRocker(void)
{
   rocketRun=false;
}

HRocker::~HRocker(void)
{
}

bool HRocker::init()
{
   listener = EventListenerTouchOneByOne::create();
   listener->onTouchBegan = CC_CALLBACK_2(HRocker::onTouchBegan,this);
   listener->onTouchMoved = CC_CALLBACK_2(HRocker::onTouchMoved,this);
   listener->onTouchEnded = CC_CALLBACK_2(HRocker::onTouchEnded,this);
   Director::getInstance()->getEventDispatcher()->addEventListenerWithSceneGraphPriority(listener,this);
   return true;
}
//创建摇杆(摇杆的操作题图片资源名，摇杆背景图片资源名，起始坐标)
HRocker* HRocker::createHRocker(const char *rockerImageName,const char *rockerBGImageName,Point position)
{
   HRocker *layer = HRocker::create();
   if (layer)
   {
      layer->rockerInit(rockerImageName,rockerBGImageName,position);
      return layer;
   }
   CC_SAFE_DELETE(layer);
   return NULL;
}
//自定义初始化函数
void HRocker::rockerInit(const char* rockerImageName,const char* rockerBGImageName,Point position)
{
   Sprite *spRockerBG = Sprite::create(rockerBGImageName);
   spRockerBG->setPosition(position);
   spRockerBG->setVisible(false);
   addChild(spRockerBG,0,tag_rockerBG);

   Sprite *spRocker = Sprite::create(rockerImageName);
   spRocker->setPosition(position);
   spRocker->setVisible(false);
   addChild(spRocker,1,tag_rocker);

   rockerBGPosition = position;
   rockerBGR = spRockerBG->getContentSize().width*0.5;//
   rocketDirection=-1;//表示摇杆方向不变
}
//启动摇杆(显示摇杆、监听摇杆触屏事件)
void HRocker::startRocker(bool _isStopOther)
{
   Sprite *rocker = (Sprite*)this->getChildByTag(tag_rocker);
   rocker->setVisible(true);

   Sprite *rockerBG = (Sprite *)this->getChildByTag(tag_rockerBG);
   rockerBG->setVisible(true);
   //想在这里监听

}
//停止摇杆(隐藏摇杆，取消摇杆的触屏监听)
void HRocker::stopRocker()
{
   Sprite *rocker = (Sprite *)this->getChildByTag(tag_rocker);
   rocker->setVisible(false);

   Sprite * rockerBG = (Sprite *)this->getChildByTag(tag_rockerBG);
   rockerBG->setVisible(false);
   //这里取消监听
   _eventDispatcher->removeEventListener(listener);

}
//获取当前摇杆与用户触屏点的角度
float HRocker::getRad(Point pos1,Point pos2)
{
   float px1 = pos1.x;
   float py1 = pos1.y;
   float px2 = pos2.x;
   float py2 = pos2.y;

   //得到两点x的距离
   float x = px2 - px1;
   //得到两点y的距离
   float y = py1 - py2;
   //算出斜边长度
   float xie = sqrt(pow(x,2) + pow(y,2));
   //得到这个角度的余弦值(通过三角函数中的店里：角度余弦值=斜边/斜边)
   float cosAngle = x / xie;
   //通过反余弦定理获取到期角度的弧度
   float rad = acos(cosAngle);
   //注意：当触屏的位置Y坐标<摇杆的Y坐标，我们要去反值-0~-180
   if (py2 < py1)
   {
      rad = -rad;
   }
   return rad;
}

Point getAngelePosition(float r,float angle){
   return ccp(r*cos(angle),r*sin(angle));
}
//抬起事件
bool HRocker::onTouchBegan(Touch *pTouch, Event *pEvent)
{
   Point point = pTouch->getLocation();
   Sprite *rocker = (Sprite *)this->getChildByTag(tag_rocker);
   if (rocker->boundingBox().containsPoint(point))
   {
      isCanMove = true;
      CCLOG("begin");
   }
   return true;
}
//移动事件
void HRocker::onTouchMoved(Touch *pTouch, Event *pEvent)
{
   if (!isCanMove)
   {
      return;
   }
   Point point = pTouch->getLocation();
   Sprite *rocker = (Sprite *)this->getChildByTag(tag_rocker);
   //得到摇杆与触屏点所形成的角度
   float angle = getRad(rockerBGPosition,point);
   //判断两个圆的圆心距是否大于摇杆背景的半径
   if (sqrt(pow((rockerBGPosition.x - point.x),2) + pow((rockerBGPosition.y - point.y),2)) >= rockerBGR)
   {

      //保证内部小圆运动的长度限制
      rocker->setPosition(ccpAdd(getAngelePosition(rockerBGR,angle),ccp(rockerBGPosition.x,rockerBGPosition.y)));
      // CCLOG("touch");
   }
   else
   {
      //当没有超过，让摇杆跟随用户触屏点移动即可
      rocker->setPosition(point);
      //CCLOG("touch");
   }

   //判断方向
   if(angle>=-PI/4&&angle   {
      rocketDirection=rocker_right;
      rocketRun=false;
      CCLOG("%d",rocketDirection);
   }
   else if(angle>=PI/4&&angle<3*PI/4)
   {
      rocketDirection=rocker_up;
      CCLOG("%d",rocketDirection);
   }
   else if((angle>=3*PI/4&&angle<=PI)||(angle>=-PI&&angle<-3*PI/4))
   {
      rocketDirection=rocker_left;
      rocketRun=true;
      CCLOG("%d",rocketDirection);
   }
   else if(angle>=-3*PI/4&&angle<-PI/4)
   {
      rocketDirection=rocker_down;
      CCLOG("%d",rocketDirection);
   }
}
//离开事件
void HRocker::onTouchEnded(Touch *pTouch, Event *pEvent)
{
   if (!isCanMove)
   {
      return;
   }
   Sprite *rockerBG = (Sprite*)this->getChildByTag(tag_rockerBG);
   Sprite *rocker = (Sprite*)this->getChildByTag(tag_rocker);
   rocker->stopAllActions();
   rocker->runAction(MoveTo::create(0.08f,rockerBG->getPosition()));
   isCanMove = false;
   rocketDirection=rocker_stay;
   CCLOG("%d",rocketDirection);
   CCLOG("end");
}
void HRocker::update(float dt)
{
   if(isCanMove)
   {

   }
}

***********************HelloWord.h******************************

#ifndef __HELLOWORLD_SCENE_H__
#define __HELLOWORLD_SCENE_H__

#include "cocos2d.h"
#include ".\HRocker.h"
//#include ".\Hero.h"
class HelloWorld : public cocos2d::Layer
{
public:

   static cocos2d::Scene* createScene();
   virtual bool init();
   void menuCloseCallback(cocos2d::Ref* pSender);
   CREATE_FUNC(HelloWorld);
   void update(float dt);
private:
   HRocker* rocker;
   //Hero* hero;
};

#endif // __HELLOWORLD_SCENE_H__

*************************HelloWord.cpp***********************

bool HelloWorld::init()
{
   //////////////////////////////
   // 1. super init first
   if ( !Layer::init() )
   {
       return false;
   }

   Size visibleSize = Director::getInstance()->getVisibleSize();
   Vec2 origin = Director::getInstance()->getVisibleOrigin();

  auto Bg = Sprite::create("background_1.jpg");
  Bg->setPosition(visibleSize.width/2,visibleSize.height/2);
  this->addChild(Bg);

 //添加摇杆
 rocker = HRocker::createHRocker("Direction_bt.png","Direction_bc.png",ccp(110,60));//其中第一张图片为摇杆的按钮，第二张为背景
 this->addChild(rocker,2);
 rocker->startRocker(true);

 //启动updata事件
 this->scheduleUpdate();

   return true;
}

//自己创建 一个精灵（英雄）类 吧 然后在这里引用

void HelloWorld::update(float dt)
{
   //判断是否按下摇杆及其类型
   switch(rocker->rocketDirection)
   {
   case 1:
      hero->SetAnimation("run_animation.plist","run_animation.png","run_",8,rocker->rocketRun);//"run_"为run_animation.png集合图片中每张图片的公共名称部分
      hero->setPosition(ccp(hero->getPosition().x+2,hero->getPosition().y)); //向右走
      break;
   case 2:
      hero->SetAnimation("run_animation.plist","run_animation.png","run_",8,rocker->rocketRun);//"run_"为run_animation.png集合图片中每张图片的公共名称部分
      hero->setPosition(ccp(hero->getPosition().x, hero->getPosition().y+2));  //向上走
      break;
   case 3:
      hero->SetAnimation("run_animation.plist","run_animation.png","run_",8,rocker->rocketRun);//"run_"为run_animation.png集合图片中每张图片的公共名称部分
      hero->setPosition(ccp(hero->getPosition().x-2,hero->getPosition().y));  //向左走
      break;
   case 4:
      hero->SetAnimation("run_animation.plist","run_animation.png","run_",8,rocker->rocketRun);//"run_"为run_animation.png集合图片中每张图片的公共名称部分
      hero->setPosition(ccp(hero->getPosition().x,hero->getPosition().y-2));  //向下走
      break;
   default:
      hero->StopAnimation();//停止所有动画和运动
      break;

   }
}

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