首页 > 代码库 > Cocos2d-x Tiled地图编辑器(二)精灵走动起来、碰撞检测
Cocos2d-x Tiled地图编辑器(二)精灵走动起来、碰撞检测
图:
程序代码:
头文件声明函数及变量
void registerWithTouchDispatcher(void); bool ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent); void ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent); void setViewpointCenter(CCPoint position) ; void setSpritePoint(CCPoint position) ; CCPoint tileCoordForPosition(CCPoint position); CCSprite *sprite1; CCTMXTiledMap *map;
在init()方法创建tiled地图,获取对象坐标
map = CCTMXTiledMap::create("map1.tmx"); this->addChild(map); CCTMXObjectGroup *object = map->objectGroupNamed("object1"); CCDictionary *sprite_object = object->objectNamed("sprite1");
并加载精灵
float x = ((CCString*)sprite_object->objectForKey("x"))->floatValue(); float y = ((CCString*)sprite_object->objectForKey("y"))->floatValue(); CCLOG("sprite postion x: %f, %f", x, y); sprite1 = CCSprite::create("yezhu.png"); sprite1->setPosition(ccp(x, y)); this->addChild(sprite1); setTouchEnabled(true); //开启触摸事件
然后重载触摸事件
void HelloWorld::registerWithTouchDispatcher() { CCDirector::sharedDirector()->getTouchDispatcher()->addTargetedDelegate(this,0, true); } bool HelloWorld::ccTouchBegan(CCTouch *pTouch, CCEvent *pEvent) { return true; }
处理触摸坐标与精灵坐标位置变量, 让精灵跟随触摸点移动
void HelloWorld::ccTouchEnded(CCTouch *pTouch, CCEvent *pEvent) { CCPoint touchlocation = convertTouchToNodeSpace(pTouch); CCPoint touchsprite = sprite1->getPosition(); CCPoint mpoint; CCLOG("touchlocationX:%f, Y:%f touchspriteX:%f, Y:%f", touchlocation.x, touchlocation.y, touchsprite.x , touchsprite.y); //点击坐标x轴减去精灵x轴 绝对值大于 点击坐标在精灵x轴减去精灵x轴 if (fabs(touchlocation.x-touchsprite.x) > fabs(touchlocation.y-touchsprite.y)) { //点击的坐标x轴大于精灵x轴 在精灵的右侧 if (touchlocation.x > touchsprite.x) { mpoint = ccp(touchsprite.x+32, touchsprite.y); //精灵x轴递增移动 } else//点击的坐标x轴小于精灵x轴 在精灵的左侧 { mpoint = ccp(touchsprite.x-32, touchsprite.y); //精灵x轴递减移动 } } //点击坐标x轴减去精灵x轴 绝对值小于 点击坐标在精灵x轴减去精灵x轴 else { //点击的坐标y轴大于精灵y轴 在精灵的上侧 if (touchlocation.y > touchsprite.y) { mpoint = ccp(touchsprite.x, touchsprite.y+32); //精灵y轴递增移动 } else //点击的坐标y轴小于精灵y轴 在精灵的下侧 { mpoint = ccp(touchsprite.x, touchsprite.y-32); //精灵y轴递减移动 } } setSpritePoint(mpoint);//设置新坐标移动精灵,并检测碰撞 CCPoint sp_point = sprite1->getPosition(); setViewpointCenter(sp_point); //设置视图中心点 }
视角跟随精灵移动
void HelloWorld::setViewpointCenter(CCPoint position) { CCSize winSize = CCDirector::sharedDirector()->getWinSize(); float x = MAX(position.x, winSize.width / 2); float y = MAX(position.y, winSize.height / 2); x = MIN(x, (map->getMapSize().width*map->getTileSize().width) - winSize.width / 2); y = MIN(y, (map->getMapSize().height*map->getTileSize().height)- winSize.height / 2); CCPoint acturalPosition = ccp(x, y); CCPoint centerView = ccp(winSize.width / 2, winSize.height / 2); CCPoint viewPoint = ccpSub(centerView, acturalPosition); this->setPosition(viewPoint); }
检测与石头图素的碰撞,若石头图素属性为true不移动精灵,否则移动精灵
void HelloWorld::setSpritePoint(CCPoint position) { CCPoint tilecoord = this->tileCoordForPosition(position);//将坐标转换成tile坐标 CCTMXLayer *layer = map->layerNamed("layer1") ; //获取地图层 int tilegid = layer->tileGIDAt(tilecoord);//获取图素GID值 CCLOG("tilegid: %d", tilegid); if (tilegid) { CCDictionary *properties = map->propertiesForGID(tilegid) ;//根据GID值获取图素属性键值集合 if (properties) { const CCString *str = properties->valueForKey("ShiTou");//键值名称 if (str && str->compare("true") == 0) //键值 return; } } sprite1->setPosition(position); }
将坐标转换成tile坐标
CCPoint HelloWorld::tileCoordForPosition(CCPoint position) { int x = position.x / map->getTileSize().width; int y = ((map->getMapSize().height * map->getTileSize().height) - position.y) / map->getTileSize().height; return ccp(x, y); }
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