cocos2d-x 小技巧

1.字符串 与 数据结构互转

CCPoint:  CCPointFromString(); {x, y}

CCSize:   CCSizeFromString(); {w, h}

CCRect:  CCSizeFromString(); {x, y, w, h}

 2.plist文件使用，配置文件使用

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">

<plist version="1.0">

<dict>

    <key>level1</key>

    <dict>

        <key>bg_far_scene</key>

        <dict>

            <key>path</key>

            <string>images/far_scene.png</string>

            <key>pos</key>

            <string>{358, 309}</string>

        </dict>

        <key>bg_near_scene</key>

        <dict>

            <key>path</key>

            <string>images/near_scene.png</string>

            <key>pos</key>

            <string>{360, 100}</string>

        </dict>

    </dict>

</dict>

</plist>

CCDictionary *data = CCDictionarycreateWithContentsOfFile("parm.plist");

data->objectForKey("gravity")

 3.触摸拖动变化

ccTouchesMoved
CCPoint diff = touch->getDelta();

 4.tile map

CCTMXTiledMap *map = CCTMXTiledMap::create("TileMaps/iso-test-vertexz.tmx");

    addChild(map, 0, kTagTileMap);



/* 直接根据位置获取地图上的精灵 */

CCTMXLayer* layer = map->layerNamed("Trees");

    m_tamara = layer->tileAt( ccp(29,29) );//获取的是CCSprite对象

    m_tamara->retain();

/* 设置某个点的GID值，GID数字标识图块对应的图片样子 */
layer->setTileGID(1, ccp( x, y ) );

//遮挡排序

// tile height is 64x32 //斜45度

// map size: 30x30

CCPoint p = m_tamara->getPosition();

p = CC_POINT_POINTS_TO_PIXELS(p);

float newZ = -(p.y+32) /16;

m_tamara->setVertexZ( newZ );



// tile height is 101x81 //正交

// map size: 12x12

CCPoint p = m_tamara->getPosition();

p = CC_POINT_POINTS_TO_PIXELS(p);

m_tamara->setVertexZ( -( (p.y+81) /81) );



//缩小，2秒缩小一半

CCArray* pChildrenArray = map->getChildren();

CCSpriteBatchNode* child = NULL;

CCObject* pObject = NULL;

CCARRAY_FOREACH(pChildrenArray, pObject)

{

        child = (CCSpriteBatchNode*)pObject;



        if(!child)

            break;



        child->getTexture()->setAntiAliasTexParameters();

}

map->runAction( CCScaleBy::create(2, 0.5f) );

 5.给Scene层抹上底色

CCLayerColor* color = CCLayerColor::create( ccc4(64,64,64,255) );

addChild(color, -1);

6.动作移动地图

// move map to the center of the screen

    CCSize ms = map->getMapSize();

    CCSize ts = map->getTileSize();

    map->runAction( CCMoveTo::create(1.0f, ccp( -ms.width * ts.width/2, -ms.height * ts.height/2 )) );

7.动作

CCActionInterval* move = CCMoveBy::create(0.5f, ccp(0,160));

    CCActionInterval* rotate = CCRotateBy::create(2, 360);

    CCActionInterval* scale = CCScaleBy::create(2, 5);

    CCActionInterval* opacity = CCFadeOut::create(2);

    CCActionInterval* fadein = CCFadeIn::create(2);

    CCActionInterval* scaleback = CCScaleTo::create(1, 1);

CCActionInstant* finish = CCCallFuncN::create(this, callfuncN_selector(TMXReadWriteTest::removeSprite));

    CCSequence* seq0 = CCSequence::create(move, rotate, scale, opacity, fadein, scaleback, finish, NULL);



void TMXReadWriteTest::removeSprite(CCNode* sender)

{

    ////----CCLOG("removing tile: %x", sender);

    CCNode* p = ((CCNode*)sender)->getParent();



    if (p)

    {

        p->removeChild((CCNode*)sender, true);

    }    

    

    //////----CCLOG("atlas quantity: %d", p->textureAtlas()->totalQuads());

}

 8.对于对象节点

CCTMXTiledMap* map = (CCTMXTiledMap*) getChildByTag(kTagTileMap);

CCTMXObjectGroup* group = map->objectGroupNamed("Object Group 1");



CCArray* objects = group->getObjects();

    CCDictionary* dict = NULL;

    CCObject* pObj = NULL;

    CCARRAY_FOREACH(objects, pObj)

{

       dict = (CCDictionary*)pObj;

        

        if(!dict)

            break;

        const char* key = "x";

        int x = ((CCString*)dict->objectForKey(key))->intValue();

        key = "y";

        int y = ((CCString*)dict->objectForKey(key))->intValue();

        key = "width";

        int width = ((CCString*)dict->objectForKey(key))->intValue();

        key = "height";

        int height = ((CCString*)dict->objectForKey(key))->intValue();

        

        glLineWidth(3);

        ccDrawLine( ccp((float)x, (float)y), ccp((float)(x+width), (float)y) );

        ccDrawLine( ccp((float)(x+width), (float)y), ccp((float)(x+width), (float)(y+height)) );

        ccDrawLine( ccp((float)(x+width), (float)(y+height)), ccp((float)x, (float)(y+height)) );

        ccDrawLine( ccp((float)x, (float)(y+height)), ccp((float)x, (float)y) );

        //获取对象的名字

        key = "name";

    CCString * str = ((CCString*)dict->objectForKey(key));

        glLineWidth(1);

}

 9、弹框提示

CCMessageBox("this is content","title");

 10、vs中va功能---自动添加头文件查找

工具->选项->键盘

VAssistX.RefactorAddInclude设置快捷键即可

 11、整个游戏速度设置^^!

float multi = 1.0f;

CCDirector::sharedDirector()->getScheduler()->setTimeScale(multi);

 

12、tile map 绘制的椭圆Object，x,y 表示 坐下交位置 , 中心点 centerX = x + width/2  centerY = y + height/2