Virtual joystick Implementation of cocos2d-x

In fact, it is not difficult to implement this function. simply copy the logic previously implemented in Java... Let's take a look at the following:

First, the joystick is regarded as an independent class and has its own series of functions. The Code only lists some of the most commonly used functions:

Joystick. h:

# Include "cocos2d. H" using namespace cocos2d; Class joystick: Public cclayer {public: joystick (void );~ Joystick (void); Public: ccpoint centerpoint; // ccpoint currentpoint In the joystick center; // the current position of the joystick is bool active; // whether to activate the joystick float radius; // The rocker radius ccsprite * jssprite; // joystick instance //********************************** ** // method: active // fullname: joystick: Active // access: Public // returns: void // qualifier: set the joystick function to be available //********************************** ** void active (); //************************************// method: inactive // fullname: joystick: inactive // access: Public // returns: void // qualifier: set the joystick function to unavailable //********************************* *** void inactive (); //************************************// method: getdirection // fullname: joystick: getdirection // access: Public // returns: cocos2d: ccpoint // qualifier: Get the joystick direction, here, the returned unit vector //********************************* *** ccpoint getdirection (); //************************************// method: getvelocity // fullname: joystick: getvelocity // access: Public // returns: Float // qualifier: obtain the strength of the joystick //********************************** ** float getvelocity (); //************************************// method: updatepos // fullname: joystick: updatepos // access: Public // returns: void // qualifier: refresh the function and submit it to the Calendar Manager // parameter: cctime DT //************************************ void updatepos (cctime DT ); //************************************// method: joystickwithcenter // fullname: joystick: joystickwithcenter // access: public static // returns: joystick * // qualifier: Initialize joystick/parameter: ccpoint apoint joystick center // parameter: float Aradius joystick radius // parameter: ccsprite * ajssprite Joystick Control Point // parameter: ccsprite * ajsbg joystick background //********************************* * ** static joystick * joystickwithcenter (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg); joystick * initwithcenter (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg ); // The following is the rewrite touch response function virtual bool cctouchbegan (cctouch * ptouch, ccevent * pevent); Virtual void cctouchmoved (cctouch * ptouch, ccevent * pevent ); virtual void cctouchended (cctouch * ptouch, ccevent * pevent); layer_node_func (joystick );};

Joystick. cpp

# Include "joystick. H" joystick: joystick (void) {} joystick ::~ Joystick (void) {} void joystick: updatepos (cctime DT) {jssprite-> setposition (ccpadd (jssprite-> getposition (), ccpmult (ccpsub (currentpoint, jssprite-> getposition (), 0.5);} void joystick: active () {If (! Active) {active = true; schedule (schedule_selector (joystick: updatepos); // Add the refresh function cctouchdispatcher: shareddispatcher ()-> addtargeteddelegate (this, 0, false ); // Add a touch delegate} void joystick: inactive () {If (active) {active = false; this-> unschedule (schedule_selector (joystick: updatepos )); // Delete the refresh function cctouchdispatcher: shareddispatcher ()-> removedelegate (this); // Delete the delegate} bool joystick: cctouchbegan (cctouch * ptouch, CCE Vent * pevent) {If (! Active) return false; ccpoint touchpoint = ptouch-> locationinview (ptouch-> View (); touchpoint = ccdirector: shareddirector ()-> converttogl (touchpoint ); if (ccpdistance (touchpoint, centerpoint)> radius) return false; currentpoint = touchpoint; return true;} void joystick: cctouchmoved (cctouch * ptouch, ccevent * pevent) {ccpoint touchpoint = ptouch-> locationinview (ptouch-> View (); touchpoint = ccdirector: shareddirector ()-> converttogl (touchpoint); If (ccpdistance (touchpoint, centerpoint)> radius) {currentpoint = ccpadd (centerpoint, ccpmult (ccpnormalize (ccpsub (touchpoint, centerpoint);} else {currentpoint = touchpoint;} void joystick:: cctouchended (cctouch * ptouch, ccevent * pevent) {currentpoint = centerpoint;} ccpoint joystick: getdirection () {return partition (ccpsub (centerpoint, currentpoint);} float joystick:: getvelocity () {return ccpdistance (centerpoint, currentpoint);} joystick * joystickwithcenter (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg) {joystick * jstick = joystick: node (); jstick-> substring (apoint, Aradius, ajssprite, ajsbg); Return jstick;} joystick * joystick: Begin (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg) {active = false; radius = Aradius; centerpoint = apoint; currentpoint = centerpoint; jssprite = ajssprite; vertex-> setposition (centerpoint ); ajsbg-> setposition (centerpoint); this-> addchild (jssprite); this-> addchild (ajsbg); return this ;}

After completing the joystick class, test the effect directly in helloworld. Add the following code to the init function:

CCSprite *testPointL = CCSprite::spriteWithFile("point.png");CCSprite *testBGL = CCSprite::spriteWithFile("joystickbg.png");Joystick *testJSL = Joystick::JoystickWithCenter(ccp(80.0f, 80.0f), 60.0f, testPointL, testBGL);this->addChild(testJSL);testJSL->Active();

See:

Resource file:

Point.png

Joystickbg.png