先看一下這篇文章：
Cocos2d-x遊戲開發之TecturePacker的plist解析
將一下碰撞檢測的實現原理，應爲圖片基於plist的壓縮，碰撞過程中npc以及hero是一個運動的動畫，也就是說，一個動作有很多圖片合成，比如***動畫有五張圖片，而npc的運動動畫有三張，這種情況下的碰撞檢測就比較難一點，簡單的來說是矩形碰撞。
碰撞算法的具體是實現，初始化動畫的過程中將，npc和hero的動作的圖片生成一個pictureArray的集合，然後成plist中讀取圖片的大小與npc的位置生成碰撞矩行，判斷5*3次。
生成picArray的實現：
bool AnimationManager::loadAnimation(AnimationFormation *af,int count)
{
//緩衝——這會加載對應的png，並裁切成SpriteFrame，而且還會完成索引
memset(charBuffer,0,sizeof(charBuffer));
//sprintf(charBuffer,"objectTexture/16bit/4444-%sYPding.plist",af[0].animateName);
//CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile(charBuffer);
CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile(totoYPdingPlist);
//創建動畫數據
CCMutableArray<CCSpriteFrame*> *spriteFrames = new CCMutableArray<CCSpriteFrame*>();
for (int i=0;i<count;i++)
{
CCMutableArray<CCString*> *picArray = new CCMutableArray<CCString*>();
for(int j=getDirection(af[i].direction);j<getDirection(af[i].direction)+af[i].frameNum;j++)
{
memset(charBuffer,0,sizeof(charBuffer));
sprintf(charBuffer,"%s_%d.png",af[i].animateName,/*getBehaviour(af[i].behaviour)*/j);
CCString* picName=new CCString();
picName->m_sString=charBuffer;
picArray->addObject(picName);
//printf("------AnimationPicture: %s\n",charBuffer);
//CCLOG("------AnimationPicture: %s",charBuffer);
//FrameCache
CCSpriteFrame *spriteFrame=CCSpriteFrameCache::sharedSpriteFrameCache()->spriteFrameByName(charBuffer);
spriteFrames->addObject(spriteFrame);
}
//使用cache緩衝管理
CCAnimation *animation=CCAnimation::animationWithFrames(spriteFrames,0.1f);
memset(charBuffer,0,sizeof(charBuffer));
sprintf(charBuffer,"%s_%s%s",af[i].animateName,getBehaviour(af[i].behaviour),getDirectionName(af[i].direction));
//CCLOG("AnimationName: %s\n",charBuffer);
//parse plist
CCPlistParseCache::sharedPlistParseCache()->addPictureArrayWithAnimationName(charBuffer,picArray);
CCAnimationCache::sharedAnimationCache()->addAnimation(animation,charBuffer);
spriteFrames->removeAllObjects();
}
spriteFrames->release();
return true;
}關鍵代碼
CCPlistParseCache::sharedPlistParseCache()>addPictureArrayWithAnimation(charBuffer,picArray);
初始話後將CCPlistParseCache類的實現
class CCRectangle :public CCObject
{
public:
const char* m_string;
CCSize size;
CCRectangle();
CCRectangle(const char* name,int width,int height);
static float rectangleGetWidth(const CCRectangle& rect);
static float rectangleGetHeight(const CCRectangle& rect);
static const char* rectangleGetName(CCRectangle* rect);
void setRectangle(const char* name,int width,int height);
float geRectangleWidth();
CCRectangle* rect;
//inline
bool initRectangle(const char* m_name,int m_width,int m_height);
inline int getWidth(void){return width;}
inline int getHeight(void){return height;}
inline const char* getName(void){return name;}
inline const CCSize& getRect(void) { return m_obRect; }
/** set size of the frame */
void setRect(const CCSize& rect);
protected:
const char* name;
int width;
int height;
CCSize m_obRect;
};
#define CCRectangleMake(name,width,height) CCRectangle((name),(width),(height))
class CCPlistParseCache : public CCObject
{
public:
bool init(void);
~CCPlistParseCache(void);
public:
/** Returns the shared instance of the Sprite Frame cache */
static CCPlistParseCache* sharedPlistParseCache(void);
CCPlistParseCache(void):m_pSpriteName(NULL),m_pSpriteNameAliases(NULL),m_pAnimPic(NULL){}
static void purgeSharedSpriteFrameCache(void);
void addSpriteCollisionWithFile(const char *pszPlist);
void addWeaponCollisionWithFile(const char *pszPlist);
void addObjCollisionWithFile(const char *pszPlist);
void addMoonkCollisionWithFile(const char *pszPlist);
CCRectangle* spriteCollisionByName(const char *pszName);
void addPictureArrayWithAnimationName(const char *pszName,CCMutableArray<CCString*>*pic);
CCMutableArray<CCString*>* pictureArrayByAnimationName(const char *pszName);
private:
CCDictionary<std::string, CCMutableArray<CCString*>*> *m_pAnimPic;
const char * picForKey(const char *key, CCDictionary<std::string, CCMutableArray<CCString*>*> *picDict);
CCDictionary<std::string, CCString*> *m_pSpriteNameAliases;
CCDictionary<std::string, CCRectangle*> *m_pSpriteName;
const char * valueForKey(const char *key, CCDictionary<std::string, CCRectangle*> *dict);
};
#endif//_CCPLISTPARSECACHE_H_部分函數的實現
void CCPlistParseCache::addSpriteCollisionWithFile(const char* pszPlist)
{
//Load rootDict from file, and then step into the metadata sub dict.
DS_Dictionary rootDict;
if(!rootDict.loadRootSubDictFromFile(pszPlist))
{
printf("no load\n");
}
if(!rootDict.stepIntoSubDictWithKey("texture"))
{
printf("No texture\n");
}
//Get an int value from the subdict
int someInt = rootDict.getIntegerForKey("height");
CCLOG("height %d",someInt);
someInt = rootDict.getIntegerForKey("width");
CCLOG("width %d",someInt);
//Step out of the sub dict and into another
rootDict.stepOutOfSubDict();
if(!rootDict.stepIntoSubDictWithKey("frames"))
{
printf("no dic\n");
}
for(int i=0;i<=59;)
{
char picture[20];
sprintf(picture,"toto_%d.png",i);
CCRectangle* rect=m_pSpriteName->objectForKey(picture);
if(!rootDict.stepIntoSubDictWithKey(picture))
{
i++;
//CCLOG("---noid--%d",i);
rootDict.stepOutOfSubDict();
continue;
}
//CCLOG("----totoid-------%d",i);
int x=rootDict.getIntegerForKey("x");
int y=rootDict.getIntegerForKey("y");
int width=rootDict.getIntegerForKey("width");
int height=rootDict.getIntegerForKey("height");
//CCCollisionRectMake(picture,width,height);
//CCLOG("Picture:%s x:%d y:%d width:%d height:%d\n",picture,x,y,width,height);
CCRectangle rectangle=CCRectangleMake(picture,width-10,height-10);
rect=new CCRectangle();
rect->initRectangle(picture,width,height);
std::string name=picture;
m_pSpriteName->setObject(rect, name);
//m_pSpriteName->release();
}
for(int i=0;i<=11;)
{
char picture[20];
sprintf(picture,"yDing_%d.png",i);
CCRectangle* rect=m_pSpriteName->objectForKey(picture);
if(!rootDict.stepIntoSubDictWithKey(picture))
{
i++;
//printf("No %s\n",picture);
rootDict.stepOutOfSubDict();
continue;
}
int x=rootDict.getIntegerForKey("x");
int y=rootDict.getIntegerForKey("y");
int width=rootDict.getIntegerForKey("width");
int height=rootDict.getIntegerForKey("height");
//CCCollisionRectMake(picture,width,height);
//printf("Picture:%s x:%d y:%d width:%d height:%d\n",picture,x,y,width,height);
CCRectangle rectangle=CCRectangleMake(picture,width,height);
rect=new CCRectangle();
rect->initRectangle(picture,width,height);
std::string name=picture;
m_pSpriteName->setObject(rect, name);
//m_pSpriteName->release();
}
for(int i=0;i<=11;)
{
char picture[20];
sprintf(picture,"pDing_%d.png",i);
//printf("piccture-----%s",picture);
CCRectangle* rect=m_pSpriteName->objectForKey(picture);
if(!rootDict.stepIntoSubDictWithKey(picture))
{
i++;
//printf("No %s\n",picture);
rootDict.stepOutOfSubDict();
continue;
}
int x=rootDict.getIntegerForKey("x");
int y=rootDict.getIntegerForKey("y");
int width=rootDict.getIntegerForKey("width");
int height=rootDict.getIntegerForKey("height");
//CCCollisionRectMake(picture,width,height);
//printf("Picture:%s x:%d y:%d width:%d height:%d\n",picture,x,y,width,height);
CCRectangle rectangle=CCRectangleMake(picture,width,height);
rect=new CCRectangle();
rect->initRectangle(picture,width,height);
std::string name=picture;
m_pSpriteName->setObject(rect, name);
//m_pSpriteName->release();
}
}此類基於CCTextureCache類實現，可以參考實現其他的。
void CCPlistParseCache::addPictureArrayWithAnimationName(const char *pszName,CCMutableArray<CCString*>*pic)
{
CCMutableArray<CCString*> * picture=m_pAnimPic->objectForKey(pszName);
//CCLOG("addPic: - %s",pszName);
picture=pic;
std::string picName=pszName;
m_pAnimPic->setObject(picture,picName);
}
CCMutableArray<CCString*>* CCPlistParseCache::pictureArrayByAnimationName(const char *pszName)
{
CCMutableArray<CCString*> *pictureArray =m_pAnimPic->objectForKey(std::string(pszName));
if (!pictureArray)
{
//printf("No PictureArray!");
//CCLOG("No PictureArray!");
}
return pictureArray;
}然後碰撞collision類的實現
class CCCollisionRect
{
public:
const char* m_string;
CCSize size;
CCCollisionRect();
CCCollisionRect(const char* name,int width,int height);
public:
static CGFloat CCRectGetHeight(const CCCollisionRect& rect);
static CGFloat CCRectGetWidth(const CCCollisionRect& rect);
static const char* CCRectGetName(const CCCollisionRect& rect);
};
#define CCCollisionRectMake(name,width, height) CCCollisionRect((name), (width), (height))
class collision:public Singleton<collision>
{
public:
collision(void);
~collision(void);
bool spriteCollision(CCNode* a,CCNode* b,const char* animationA,const char* animationB,Direction dir,Behaviour be);
void spriteArray(const char* plistName);
void plistParse();
void getCollisionRect(const char* animationName,Direction dir,Behaviour be,CCNode* node);
CCMutableArray<CCString*>* getAnimationPictureName(const char* animationName,Direction dir,Behaviour be);
char* getDirectionName(Direction direction);
char* getBehaviour(Behaviour behaviour);
bool isCCNodeCollision(const char* animNameA,const char* animNameB,Boy* boy,Enemy* enemy);
bool isMoonkCollision(const char* animNameA,const char* animNameB,Boy* boy,Boss* boss);
bool isPlayerCollision(const char* animNameA,const char* animNameB,Player* p,Enemy* enemy);
bool bulletsCCNodeCollision(int i,const char* animNameA,const char* animNameB,Bullet* bullet,Enemy* enemy);
bool bulletsMoonkCollision(int i,const char* animNameA,const char* animNameB,Bullet* bullet,Boss* moonk);
private:
BoxCollision boxCollision;
bool isWingInit;
bool isYdingInit;
bool isPdingInit;
bool isMoonkInit;
};
#define sCollision collision::getInstance()
#endif//_COLLISION_H_實現一個函數
bool collision::isCCNodeCollision(const char* animNameA,const char* animNameB,Boy* boy,Enemy* enemy)
{
//data not had inited
CCMutableArray<CCString*>*collisionPicArrayA=getAnimationPictureName(animNameA,boy->getDirection(),boy->getBehaviour());
CCMutableArray<CCString*>*collisionPicArrayB=getAnimationPictureName(animNameB,enemy->getDirection(),enemy->getBehaviour());
for(int i=0;i<collisionPicArrayA->count();i++)
{
for(int j=0;j<collisionPicArrayB->count();j++)
{
CCString* strA=collisionPicArrayA->getObjectAtIndex(i);
//return rectangle width and height
CCRectangle* rectangleA=CCPlistParseCache::sharedPlistParseCache()->spriteCollisionByName(strA->m_sString.c_str());
int widthA=rectangleA->getWidth();
int heightA=rectangleA->getHeight();
//CCLOG("---------------Collision:%s",strA->m_sString.c_str());
CCString* strB=collisionPicArrayB->getObjectAtIndex(j);
CCRectangle* rectangleB=CCPlistParseCache::sharedPlistParseCache()->spriteCollisionByName(strB->m_sString.c_str());
int widthB=rectangleB->getWidth();
int heightB=rectangleB->getHeight();
char charBuffer[128];
memset(charBuffer,0,sizeof(charBuffer));
//CCLOG("COLLISION:animName:%s----width:%d height:%d\n",strA->m_sString.c_str(),widthA,heightA);
//CCLOG("COLLISION:animName:%s----width:%d height:%d\n",strB->m_sString.c_str(),widthB,heightB);
//attackAnimation toto_14.png~toto_19.png
//ATTACK ANIMATION COLLISION校正
for(int i=14;i<14+5;i++)
{
sprintf(charBuffer,"toto_%d.png",i);
if(strcmp(charBuffer,strA->m_sString.c_str())==0)
{
widthA=widthA-70;
heightA=heightA-50;
}
memset(charBuffer,0,sizeof(charBuffer));
}
CCRect a;
CCRect b;
a=boy->getCollisionRect(widthA,heightA);
b=enemy->getCollisionRect(widthB,heightB);
if(CCRect::CCRectIntersectsRect(a,b))
{
//CCLOG("COLLISION YES!");
return true;
}
}
}
return false;
}具體怎麼用下一篇再講，待續（兩月後，期間沒網）。。。。。。。。。。。。。。。。。。
long原創