cocos2d-x 游戏开发之游戏控制器摇杆

概述头文件： #ifndef __HROCKER_H__#define __HROCKER_H__#include "cocos2d.h"#include "cocos-ext.h"USING_NS_CC;USING_NS_CC_EXT;//用于标识摇杆与摇杆的背景typedef enum{ tag_rocker, tag_rockerBG,}tagForHRocker;/

头文件：

#ifndef__HROCKER_H__#define__HROCKER_H__#include"cocos2d.h"#include"cocos-ext.h"USING_NS_CC;USING_NS_CC_EXT;//用于标识摇杆与摇杆的背景typedefenum{	tag_rocker,tag_rockerBG,}tagForHRocker;//用于标识摇杆方向typedefenum{	rocker_stay,rocker_right,rocker_up,rocker_left,rocker_down,}tagDirecton;classHRocker:publiccocos2d::Layer{public:	HRocker(voID);	~HRocker(voID);	//创建摇杆(摇杆的 *** 作题图片资源名，摇杆背景图片资源名，起始坐标)	staticHRocker*createHRocker(constchar*rockerImagename,constchar*rockerBGImagename,Vec2position);	//启动摇杆(显示摇杆、监听摇杆触屏事件)	voIDstartRocker(bool_isstopOther);	//停止摇杆(隐藏摇杆，取消摇杆的触屏监听)	voIDstopRocker();	//判断控制杆方向，用来判断精灵上、下、左、右运动	introcketDirection;	//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	boolrocketRun;	//触屏事件	virtualboolontouchBegan(touch*ptouch,cocos2d::Event*pEvent);	virtualvoIDontouchmoved(touch*ptouch,cocos2d::Event*pEvent);	virtualvoIDontouchended(touch*ptouch,cocos2d::Event*pEvent);	CREATE_FUNC(HRocker);private:	//自定义初始化函数	voIDrockerInit(constchar*rockerImagename,constVec2position);	//是否可 *** 作摇杆	boolisCanMove;	//获取当前摇杆与用户触屏点的角度	floatgeTrad(Vec2pos1,Vec2pos2);	//摇杆背景的坐标	Vec2rockerBGposition;	//摇杆背景的半径	floatrockerBGR;};#endif

源文件：

#include"HRocker.h"constdoublePI=3.1415;USING_NS_CC;HRocker::HRocker(voID){	rocketRun=false;}HRocker::~HRocker(voID){}//创建摇杆(摇杆的 *** 作题图片资源名，摇杆背景图片资源名，起始坐标)HRocker*HRocker::createHRocker(constchar*rockerImagename,Vec2position){	HRocker*layer=HRocker::create();	if(layer)	{		layer->rockerInit(rockerImagename,rockerBGImagename,position);		returnlayer;	}	CC_SAFE_DELETE(layer);	returnNulL;}//自定义初始化函数voIDHRocker::rockerInit(constchar*rockerImagename,constVec2position){	Sprite*spRockerBG=Sprite::create(rockerBGImagename);	spRockerBG->setposition(position);	spRockerBG->setVisible(false);	addChild(spRockerBG,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)voIDHRocker::startRocker(bool_isstopOther){	Sprite*rocker=(Sprite*)this->getChildByTag(tag_rocker);	rocker->setVisible(true);	Sprite*rockerBG=(Sprite*)this->getChildByTag(tag_rockerBG);	rockerBG->setVisible(true);	autodispatcher=Director::getInstance()->getEventdispatcher();	autotouchListener=EventListenertouchOneByOne::create();	touchListener->ontouchBegan=CC_CALLBACK_2(HRocker::ontouchBegan,this);	touchListener->ontouchmoved=CC_CALLBACK_2(HRocker::ontouchmoved,this);	touchListener->ontouchended=CC_CALLBACK_2(HRocker::ontouchended,this);	touchListener->setSwallowtouches(true);	dispatcher->addEventListenerWithSceneGraPHPriority(touchListener,this);}//停止摇杆(隐藏摇杆，取消摇杆的触屏监听)voIDHRocker::stopRocker(){	Sprite*rocker=(Sprite*)this->getChildByTag(tag_rocker);	rocker->setVisible(false);	Sprite*rockerBG=(Sprite*)this->getChildByTag(tag_rockerBG);	rockerBG->setVisible(false);	this->removeChildByTag(tag_rocker);this->removeChildByTag(tag_rockerBG);}//获取当前摇杆与用户触屏点的角度floatHRocker::geTrad(Vec2pos1,Vec2pos2){	floatpx1=pos1.x;	floatpy1=pos1.y;	floatpx2=pos2.x;	floatpy2=pos2.y;	//得到两点x的距离	floatx=px2-px1;	//得到两点y的距离	floaty=py1-py2;	//算出斜边长度	floatxIE=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)	floatcosAngle=x/xIE;	//通过反余弦定理获取到期角度的弧度	floatrad=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;	}	returnrad;}Vec2getAngeleposition(floatr,floatangle){	returnPoint(r*cos(angle),r*sin(angle));}//抬起事件boolHRocker::ontouchBegan(touch*ptouch,Event*pEvent){	Vec2Vec2=ptouch->getLocation();	Sprite*rocker=(Sprite*)this->getChildByTag(tag_rocker);	if(rocker->getBoundingBox().containsPoint(Vec2))	{		isCanMove=true;		cclOG("begin");	}	returntrue;}//移动事件voIDHRocker::ontouchmoved(touch*ptouch,Event*pEvent){	if(!isCanMove)	{		return;	}	Vec2Vec2=ptouch->getLocation();	Sprite*rocker=(Sprite*)this->getChildByTag(tag_rocker);	//得到摇杆与触屏点所形成的角度	floatangle=geTrad(rockerBGposition,Vec2);	//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-Vec2.x),2)+pow((rockerBGposition.y-Vec2.y),2))>=rockerBGR)	{		//保证内部小圆运动的长度限制		rocker->setposition(getAngeleposition(rockerBGR,angle)+Point(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(Vec2);		//cclOG("touch");	}	//判断方向	if(angle>=-PI/4&&angle<PI/4)	{		rocketDirection=rocker_right;		rocketRun=false;		cclOG("%d",rocketDirection);	}	elseif(angle>=PI/4&&angle<3*PI/4)	{		rocketDirection=rocker_up;		cclOG("%d",rocketDirection);	}	elseif((angle>=3*PI/4&&angle<=PI)||(angle>=-PI&&angle<-3*PI/4))	{		rocketDirection=rocker_left;		rocketRun=true;		cclOG("%d",rocketDirection);	}	elseif(angle>=-3*PI/4&&angle<-PI/4)	{		rocketDirection=rocker_down;		cclOG("%d",rocketDirection);	}}//离开事件voIDHRocker::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");}

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