cocos2d-x开发之动作游戏实战--5

先看一下这篇文章：

Cocos2d-x游戏开发之TecturePacker的plist解析
将一下碰撞检测的实现原理，应为图片基于plist的压缩，碰撞过程中npc以及hero是一个运动的动画，也就是说，一个动作有很多图片合成，比如攻击动画有五张图片，而npc的运动动画有三张，这种情况下的碰撞检测就比较难一点，简单的来说是矩形碰撞。
碰撞算法的具体是实现，初始化动画的过程中将，npc和hero的动作的图片生成一个pictureArray的集合，然后成plist中读取图片的大小与npc的位置生成碰撞矩行，判断5*3次。
生成picArray的实现：

bool AnimationManager::loadAnimation(AnimationFormation *af,int count)
{
//缓冲——这会加载对应的png，并裁切成SpriteFrame，而且还会完成索引
memset(charBuffer,0,sizeof(charBuffer));
//sprintf(charBuffer,"objectTexture/16bit/4444-%sYPding.plist",af[0].animateName);

//CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile(charBuffer);
CCSpriteFrameCache::sharedSpriteFrameCache()->addSpriteFramesWithFile(totoYPdingPlist);
//创建动画数据
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缓冲管理
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;
}

关键代码

CCPlistParseCache::sharedPlistParseCache()>addPictureArrayWithAnimation(charBuffer,picArray);

初始话后将CCPlistParseCache类的实现

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_

部分函数的实现

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();
}
}

此类基于CCTextureCache类实现，可以参考实现其他的。

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;
}

然后碰撞collision类的实现

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_

实现一个函数

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;
}

具体怎么用下一篇再讲，待续（两月后，期间没网）。。。。。。。。。。。。。。。。。。
long原创

本文出自 “Cocos2D-X” 博客，请务必保留此出处http://lonag.blog.51cto.com/3340984/1223189