Cocos2d－x碰撞检查与消灭的实现

#include"HelloWorldScene.h"
1. #include"SimpleAudioEngine.h"
2. namespacecocos2d;
3. namespaceCocosDenshion;
4. CCScene*HelloWorld::scene()
5. //'scene'isanautoreleaSEObject
6. CCScene*scene=CCScene::create();
7. //'layer'isanautoreleaSEObject
8. HelloWorld*layer=HelloWorld::create();
9. //addlayerasachildtoscene
10. scene->addChild(layer);
11. //returnthescene
12. returnscene;
13. }
14. //on"init"youneedtoinitializeyourinstance
15. boolHelloWorld::init()
16. //////////////////////////////
17. //1.superinitfirst
18. if(CCLayerColor::initWithColor(ccc4(255,255,255)))
19. CCSizewinSize=CCDirector::sharedDirector()->getWinSize();//获取屏幕大小
20. arrayProjectile=CCArray::create();
21. aarayTarget=CCArray::create();
22. floatsprite_scale=2.0;
23. CCSprite*Player=CCSprite::create("Player.png");
24. Player->setScale(sprite_scale);
25. Player->setPosition(ccp(Player->getContentSize().width*sprite_scale/2.0,winSize.height/2.0));
26. this->addChild(Player);
27. aarayTarget->retain();
28. arrayProjectile->retain();
29. this->schedule(schedule_selector(HelloWorld::gameLogic),1.0);
30. this->schedule(schedule_selector(HelloWorld::update));
31. this->setTouchEnabled(true);
32. returntrue;
33. }
34. else{
35. false;
36. voidHelloWorld::gameLogic(cocos2d::CCTimedt){
37. this->addTarget();
38. HelloWorld::addTarget(){
39. CCSizewinSize=CCDirector::sharedDirector()->getWinSize();
40. CCSprite*target=CCSprite::create("Target.png");
41. //随机位置
42. intminY=target->getContentSize().height/2.0;
43. intmaxY=winSize.height-target->getContentSize().height/2.0;
44. intrangeY=maxY-minY;
45. intactualY=rand()%rangeY+minY;
46. target->setPosition(ccp(winSize.width-target->getContentSize().width/2.0,actualY));
47. target->setTag(1);
48. this->addChild(target);
49. aarayTarget->addObject(target);
50. //随机速度
51. floatminDuration=2.0;
52. floatmaxDuration=4.0;
53. intrangeDuration=maxDuration-minDuration;
54. floatactualDuration=rand()%rangeDuration+minDuration;
55. CCFiniteTimeAction*actionMove=CCMoveTo::create(actualDuration,ccp(0-target->getContentSize().width/2.0,actualY));//0代表屏幕外，这句表示在3秒内从初始位置移动到屏幕外
56. //增加一个回调函数，回收移动到屏幕外的精灵
57. CCFiniteTimeAction*actionMoveDone=CCCallFuncN::create(this,callfuncN_selector(HelloWorld::spriteMoveFinished));
58. target->runAction(CCSequence::create(actionMove,actionMoveDone,NULL));
59. HelloWorld::spriteMoveFinished(cocos2d::CCNode*sender){
60. CCSprite*sprite=(CCSprite*)sender;
61. //this->removeChild(sprite,true);
62. if(sprite->getTag()==1){
63. aarayTarget->removeObject(sprite);//清除敌人
64. }elseif(sprite->getTag()==2){
65. arrayProjectile->removeObject(sprite);//清除飞镖
66. //发射飞镖
67. HelloWorld::ccTouchesEnded(cocos2d::cocos2d::CCEvent*event){
68. CCTouch*touch=(CCTouch*)touches->anyObject();
69. CCPointlocation=touch->getLocationInView();
70. location=this->convertTouchToNodeSpace(touch);
71. CCSprite*projectile=CCSprite::create("Projectile.png");
72. projectile->setPosition(ccp(20,winSize.height/2));
73. floatoffX=location.x-projectile->getPositionX();
74. floatoffY=location.y-projectile->getPositionY();
75. if(offX<=0){
76. return;
77. projectile->setTag(2);
78. this->addChild(projectile);
79. arrayProjectile->addObject(projectile);
80. floatangle=offY/offX;
81. floatrealX=winSize.width+projectile->getContentSize().width/2;
82. floatrealY=realX*angle+projectile->getPositionY();
83. CCPointfinalPosition=ccp(realX,realY);
84. //获取飞镖飞行时间
85. floatlength=sqrtf(realX*realX+realY*realY);
86. floatvelocity=480;
87. floatrealMoveDuration=length/velocity;
88. projectile->runAction(CCSequence::create(CCMoveTo::create(realMoveDuration,finalPosition),CCCallFuncN::create(this,callfuncN_selector(HelloWorld::spriteMoveFinished)),153); background-color:inherit; font-weight:bold">NULL));
89. //碰撞检测，消除飞镖和敌人
90. HelloWorld::update(cocos2d::CCTimedt){
91. for(inti=0;i<aarayTarget->count();i++){
92. CCSprite*target=(CCSprite*)aarayTarget->objectAtIndex(i);
93. intj=0;j<arrayProjectile->count();j++){
94. CCSprite*projectile=(CCSprite*)arrayProjectile->objectAtIndex(j);
95. if(target->boundingBox().intersectsRect(projectile->boundingBox())){
96. aarayTarget->removeObjectAtIndex(i);
97. arrayProjectile->removeObjectAtIndex(j);
98. this->removeChild(target);
99. this->removeChild(projectile);
100. break;
101. HelloWorld::menuCloseCallback(CCObject*pSender)
102. {
103. CCDirector::sharedDirector()->end();
104. #if(CC_TARGET_PLATFORM==CC_PLATFORM_IOS)
105. exit(0);
106. #endif
107. }

（编辑：李大同）

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