[cocos2d-x]地圖的應(yīng)用

//獲取瓷磚的屬性     CCPoint playerindex = ccp(a,b);     //根據(jù)坐標(biāo)點(diǎn)獲取GID     int tiledid = layer->tileGIDAt(playerindex);     if (tiledid > 0) {   //根據(jù)GID獲取指定瓷磚塊的屬性         CCDictionary *tiledic = (CCDictionary *)tileMap->propertiesForGID(tiledid);         //判斷瓷磚塊是否有屬性，如果有就用它的屬性，如果沒有         if (tiledic) {             CCString * value = (CCString *)tiledic->objectForKey("isTree");             int va = value->intValue();             if (va == 1) {                 CCLog("這是一棵樹");             }         }         else         {             CCLog("該瓷磚快沒有屬性");         }     }

Cocos2d: a:12,b:2

Cocos2d: 這是一棵樹

3.點(diǎn)擊對象圖層獲取對象圖層的屬性

/**************獲取對象圖層********************************/     CCTMXObjectGroup * objectLayer = tileMap->objectGroupNamed("objLayer");     //判斷觸摸點(diǎn)是否在對象圖層上     bool isTouchInRectangle = false;     //獲取對象圖層的對象數(shù)目     int numObjects = objectLayer->getObjects()->count();          for (int i=0; i<numObjects; i++) {         //獲取到這個對象的屬性         CCDictionary * properties = (CCDictionary *)objectLayer->getObjects()->objectAtIndex(i);                  CCRect rect = getRectFromObjectPropertier(properties, tileMap);         //看看觸摸點(diǎn)是否在對象圖層上         if (rect.containsPoint(location)) {             isTouchInRectangle = true;             break;         }     }     if (isTouchInRectangle) {         CCLog("碰到圖層了");     } 

CCRect HelloWorld::getRectFromObjectPropertier(cocos2d::CCDictionary *properties, cocos2d::CCTMXTiledMap *tileMap) {     //這里的valueForKey的四個參數(shù)是圖層中默認(rèn)有的屬性     float x,y,width,height;     x = properties->valueForKey("x")->floatValue()+tileMap->getPosition().x;     y = properties->valueForKey("y")->floatValue()+tileMap->getPosition().y;     width = properties->valueForKey("width")->floatValue();     height = properties->valueForKey("height")->floatValue();     CCRect pos = CCRectMake(x, y, width, height);     return pos; }

4.點(diǎn)擊圖層能實(shí)現(xiàn)地圖的移動(將點(diǎn)擊的地方移動到屏幕的中央)

bool HelloWorld::ccTouchBegan(cocos2d::CCTouch *pTouch, cocos2d::CCEvent *pEvent) {     CCPoint point = this->tilePosFromLocation(pTouch->getLocation(), (CCTMXTiledMap *)this->getChildByTag(1));     //CCLog("%f,%f",point.x,point.y);          //點(diǎn)擊讓地圖移動     this->centerTileMapOnTileCoord(point,(CCTMXTiledMap *)this->getChildByTag(1));          return true; }

//讓圖層移動的方法 void HelloWorld::centerTileMapOnTileCoord(cocos2d::CCPoint tilePos, cocos2d::CCTMXTiledMap *tileMap) {     CCSize screenSize = CCDirector::sharedDirector()->getWinSize();     CCPoint screenCenter = CCPointMake(screenSize.width / 2, screenSize.height / 2);     tilePos = CCPointMake(tilePos.x, (tileMap->getMapSize().height - 1) - tilePos.y);     CCPoint scrollPosition = ccp(-(tilePos.x*tileMap->getTileSize().width),-(tilePos.y*tileMap->getTileSize().height));     scrollPosition.x+=screenCenter.x-tileMap->getTileSize().width/2;     scrollPosition.y+=screenCenter.y-tileMap->getTileSize().height/2;          scrollPosition.x=(MIN(scrollPosition.x, 0));     scrollPosition.x=(MAX(scrollPosition.x, -screenSize.width));     scrollPosition.y= (MIN(scrollPosition.y, 0));     scrollPosition.y= (MAX(scrollPosition.y, -screenSize.height));          //移動     CCAction * move = CCMoveTo::create(0.2f, scrollPosition);     tileMap->stopAllActions();     tileMap->runAction(move); }

5.在圖層上劃線

//如果是DEBUG版本就會出現(xiàn),如果是RELEASE版本就不會出現(xiàn)這段代碼 #ifdef DEBUG //畫圖 //draw函數(shù)是系統(tǒng)自動不斷調(diào)用的 void HelloWorld::draw() {     //獲取地圖     CCNode * node = this->getChildByTag(1);     CCTMXTiledMap * tileMap = (CCTMXTiledMap *)node;     //獲取對象圖層     CCTMXObjectGroup * objectLayer = tileMap->objectGroupNamed("objLayer");     //設(shè)置畫筆顏色     ccDrawColor4B(255, 0, 0, 255);     //一次遍歷對象圖層中每一塊瓷磚     for (int i = 0; i<objectLayer->getObjects()->count(); i++) {         CCDictionary * properties = (CCDictionary *)objectLayer->getObjects()->objectAtIndex(i);         CCRect rect = this->getRectFromObjectPropertier(properties, tileMap);         this->drawRect(rect);     }          CCSize screenSize = CCDirector::sharedDirector()->getWinSize();     CCPoint center = CCPointMake(screenSize.width/2, screenSize.height/2);     ccDrawCircle(center, 10, 240, 8, true);          //線的寬度     glLineWidth(2.0f); }  void HelloWorld::drawRect(CCRect rect) {     CCPoint pos1,pos2,pos3,pos4;     pos1 = CCPointMake(rect.origin.x, rect.origin.y);     pos2 = CCPointMake(rect.origin.x, rect.origin.y + rect.size.height);     pos4 = CCPointMake(rect.origin.x + rect.size.width, rect.origin.y);     pos3 = CCPointMake(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height);          ccDrawLine(pos1, pos2);     ccDrawLine(pos2, pos3);     ccDrawLine(pos3, pos4);     ccDrawLine(pos4, pos1); } #endif 

注意：地圖的z軸屬性要設(shè)置低一點(diǎn)，不然紅線顯示不出來被地圖遮蓋了。