Cocos2d-x 虚拟摇杆控制精灵上下左右运动--《赵云要格斗》

#include "HRocker.h" const double PI=3.1415; HRocker::HRocker(void) { rocketRun=false; } HRocker::~HRocker(void) { } //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,CCPoint 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,CCPoint position) { CCSprite *spRockerBG = CCSprite::create(rockerBGImageName); spRockerBG->setPosition(position); spRockerBG->setVisible(false); addChild(spRockerBG,0,tag_rockerBG); CCSprite *spRocker = CCSprite::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) { CCSprite *rocker = (CCSprite*)this->getChildByTag(tag_rocker); rocker->setVisible(true); CCSprite *rockerBG = (CCSprite *)this->getChildByTag(tag_rockerBG); rockerBG->setVisible(true); CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this,-1,_isStopOther); } //停止摇杆(隐藏摇杆，取消摇杆的触屏监听) void HRocker::stopRocker() { CCSprite *rocker = (CCSprite *)this->getChildByTag(tag_rocker); rocker->setVisible(false); CCSprite * rockerBG = (CCSprite *)this->getChildByTag(tag_rockerBG); rockerBG->setVisible(false); CCDirector::sharedDirector()->getTouchDispatcher()->removeDelegate(this); } //获取当前摇杆与用户触屏点的角度 float HRocker::getRad(CCPoint pos1,CCPoint 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; } CCPoint getAngelePosition(float r,float angle){ return ccp(r*cos(angle),r*sin(angle)); } //抬起事件 bool HRocker::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent) { CCPoint point = pTouch->getLocation(); CCSprite *rocker = (CCSprite *)this->getChildByTag(tag_rocker); if (rocker->boundingBox().containsPoint(point)) isCanMove = true; return true; } //移动事件 void HRocker::ccTouchMoved(CCTouch *pTouch, CCEvent *pEvent) { if (!isCanMove) { return; } CCPoint point = pTouch->getLocation(); CCSprite *rocker = (CCSprite *)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))); } else rocker->setPosition(point); //判断方向 if(angle>=-PI/4&&angle<PI/4) { rocketDirection=rocker_right; rocketRun=false; } else if(angle>=PI/4&&angle<3*PI/4) { rocketDirection=rocker_up; } else if((angle>=3*PI/4&&angle<=PI)||(angle>=-PI&&angle<-3*PI/4)) { rocketDirection=rocker_left; rocketRun=true; } else if(angle>=-3*PI/4&&angle<-PI/4) { rocketDirection=rocker_down; } } //离开事件 void HRocker::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent) { if (!isCanMove) { return; } CCSprite *rockerBG = (CCSprite*)this->getChildByTag(tag_rockerBG); CCSprite *rocker = (CCSprite*)this->getChildByTag(tag_rocker); rocker->stopAllActions(); rocker->runAction(CCMoveTo::create(0.08f,rockerBG->getPosition())); isCanMove = false; rocketDirection=rocker_stay; }