Simulate joystick operation

Many mobile apps now have the function of simulating the joystick. Today, the project has encountered a delegate event. I will try to implement this joystick function by the way.

The Code is as follows:

/** Joystick. H * yaogan ** created by Liu Yanghui on 11-10-27. * copyright 2011 ard8. All Rights Reserved. **/# ifndef joystick_h # define joystick_h # include "cocos2d. H "using namespace cocos2d; Class joystick: Public cclayer {public: ccpoint centerpoint; // The ccpoint currentpoint In the joystick center; // the current position of the joystick is bool active; // whether float radius is activated; // rocker radius ccsprite * jssprite; void active (); void inactive (); ccpoint getdirection (); float getvelocity (); void updatepos (cctime DT ); // initialize apoint. The joystick center Aradius is the joystick radius. ajssprite is the joystick control point. ajsbg is the joystick background static joystick * joystickwithcenter (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite ); joystick * compute (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg); Virtual bool compute (cctouch * ptouch, ccevent * pevent); Virtual void compute (cctouch * ptouch, ccevent * pevent); Virtual void cctouchended (cctouch * ptouch, ccevent * pevent); layer_node_func (joystick);}; # endif

 

/** Joystick. CPP * yaogan ** created by Liu Yanghui on 11-10-27. * copyright 2011 ard8. All Rights Reserved. **/# include "joystick. H "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 touch delegate} else {}} // freeze the joystick void joystick: inactive () {If (active) {active = false; this-> unschedule (schedule_selector (joystick:: updatepos); // Delete the refresh cctouchdispatcher: shareddispatcher ()-> removedelegate (this); // Delete the delegate} else {} bool joystick: cctouchbegan (cctouch * Touch, ccevent * event) {If (! Active) return false; ccpoint touchpoint = touch-> locationinview (touch-> View (); touchpoint = ccdirector: shareddirector ()-> converttogl (touchpoint ); if (ccpdistance (touchpoint, centerpoint)> radius) return false; currentpoint = touchpoint; return true;} void joystick: cctouchmoved (cctouch * touch, ccevent * event) {ccpoint touchpoint = touch-> locationinview (touch-> View (); touchpoint = ccdirector: shareddire()-> converttogl (touchpoint); If (ccpdistance (touchpoint, centerpoint)> radius) {currentpoint = ccpadd (centerpoint, ccpmult (ccpnormalize (ccpsub (touchpoint, centerpoint);} else {currentpoint = touchpoint;} void joystick:: cctouchended (cctouch * touch, ccevent * event) {currentpoint = centerpoint;} // gets the joystick orientation. Note that the unit vector ccpoint joystick: getdirection () {return ccpnormalize (ccpsub (centerpoint, currentpoint);} // obtain the joystick strength float joystick: getvelocity () {return ccpdistance (centerpoint, currentpoint);} joystick * joystick :: compute (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg) {joystick * jstick = joystick: node (); jstick-> extract (apoint, Aradius, ajssprite, ajsbg); Return jstick;} joystick * joystick: initwithcenter (ccpoint apoint, float Aradius, ccsprite * ajssprite, ccsprite * ajsbg) {active = false; radius = Aradius; centerpoint = apoint; currentpoint = centerpoint; jssprite = ajssprite; jssprite-> setposition (centerpoint); ajsbg-> setposition (centerpoint); this-> addchild (jssprite ); this-> addchild (ajsbg); return this ;}

Okay, basically all of them have implemented the joystick function. Let's call it to see how it works. Create a scenario

Add the resource file that I want during initialization.

Ccsize screensize = ccdirector: shareddirector ()-> getwinsize (); ccsprite * mainbg = ccsprite: spritewithfile ("bg.png"); mainbg-> setposition (CCP (screensize. width * 0.5, screensize. height * 0.5); this-> addchild (mainbg); ccsprite * testpointl = ccsprite: spritewithfile ("point.png"); // joystick ccsprite * testbgl = ccsprite :: spritewithfile ("joytickbg.png"); // joystick * testjsl = joystick: joystickwithcenter (CCP (80366f, 80366f), 60366f, testpointl, testbgl ); this-> addchild (testjsl); testjsl-> active (); Return true;

Run, OK, everything is normal.

Khan. Suddenly I found a very sad thing. I was not allowed to upload images in csdn. Registration cannot reach one week. Let me go. Add it later.