cocos2d-x学习笔记(19)--label 、label atlas

cocos2d-x学习笔记(19)--label 、label atlas
     在正式开讲前，还是要做一些准备工作。
     首先讲讲一个ccV3F_C4B_T2F_Quad类的使用，大家不要被这个长长的名称吓到，只需来个刨根问底，就对它的使用方法一目了然了。下面我把，官方文档上的资料整理了一下放在一起：

[plain]
ccV3F_C4B_T2F_Quad
    member list:
    ccV3F_C4B_T2F tl(top left)
    ccV3F_C4B_T2F bl(bottom left)
    ccV3F_C4B_T2F tr(top rignt)
    ccV3F_C4B_T2F br(bottom right)

Detailed Description:a Point with a vertex point, a tex coord point and a color 4B
(ccV3F_C4B_T2F这个点是有顶点、纹理坐标和颜色设置三个组成)
ccV3F_C4B_T2F
    member list:
    ccVertex3F vertices
    ccColor4B colors
    ccTex2d texCoords

Detailed Description:A vertex composed of 2 floats: x, y.
(ccVertex3F这个顶点是有x、y坐标组成（注：2D游戏只用到平面坐标，无需z坐标）)
ccVertex3F
    member list:
    GLfloat x
    GLfloat y
    GLfloat z

Detailed Description:RGBA color composed of 4 bytes.
ccColor4B
    member list:
    GLubyte r
    GLubyte g
    GLubyte b
    GLubyte a

Detailed Description:A texcoord composed of 2 floats: u, y.
ccTex2F
    member list:
    GLfloat u
    GLfloat v

就是说ccV3F_C4B_T2F_Quad这个类有四个成员属性，它们都是ccV3F_C4B_T2F类，分别表示左上，左下，右上，右下；
而ccV3F_C4B_T2F这个类有三个成员属性，它们分别是设置顶点坐标、纹理坐标和颜色；
然后就是对应上面三个类（ccVertex3F、ccColor4B和ccTex2d）的成员属性了；
第二个要补充的是ASICC表，这里我先上传，用处到后面再解释：

接下来就开始进入主题了..................
step1:创建cocos2d-x工程，命名为labelAtlas;
step2:在HelloWorldScene.h中添加四个类：
[plain]
class BasicLayer:public CCLayer
{
public:
    BasicLayer();
    ~BasicLayer();

    void backMenuCallback(CCObject* pSender);
    void restartMenuCallback(CCObject* pSender);
    void nextMenuCallback(CCObject* pSender);

};

class TextureAtlasTest:public BasicLayer
{
protected:
    CCTextureAtlas* m_atlas;
public:
    TextureAtlasTest();
    ~TextureAtlasTest();

    virtual void draw();
};

class LabelAtlasTest:public BasicLayer
{
protected:
    ccTime m_time;

public:
    LabelAtlasTest();
    ~LabelAtlasTest();

    void update(ccTime dt);
};

class LabelTest:public BasicLayer
{
protected:
    ccTime m_time;
public:

    LabelTest();
    ~LabelTest();

    void update(ccTime dt);
};

step3:在HelloWorldScene.cpp中添加下面代码：
先添加一些常量和全局变量
[plain]
static int index = 1;
const int MAX_INDEX = 3;
const int tagAtlas = 1;//用于标记CCLabelAtlas对象
const int tagLabel = 2;//用于标记CCLabelTFT对象

[plain]
CCLayer* runThisTest(int index)
{
    switch(index)
    {
    case 1:
        return new TextureAtlasTest();

    case 2:
        return new LabelAtlasTest();

    case 3:
        return new LabelTest();

    }
    return NULL;
}
然后添加成员函数：
[plain]
/************************************************************************/
/*BasicLayer                                                                   */
/************************************************************************/
BasicLayer::BasicLayer()
{
    CCSize size = CCDirector::sharedDirector()->getWinSize();

    CCLabelTTF* backLabel = CCLabelTTF::labelWithString("back", "Arial", 30);
    CCLabelTTF* restartLabel = CCLabelTTF::labelWithString("restart", "Arial", 30);
    CCLabelTTF* nextLabel = CCLabelTTF::labelWithString("next", "Arial", 30);

    CCMenuItemLabel* backItem = CCMenuItemLabel::itemWithLabel(backLabel, this, menu_selector(BasicLayer::backMenuCallback));
    CCMenuItemLabel* restartItem = CCMenuItemLabel::itemWithLabel(restartLabel, this, menu_selector(BasicLayer::restartMenuCallback));
    CCMenuItemLabel* nextItem = CCMenuItemLabel::itemWithLabel(nextLabel, this, menu_selector(BasicLayer::nextMenuCallback));

    CCMenu* backMenu = CCMenu::menuWithItem(backItem);
    CCMenu* restartMenu = CCMenu::menuWithItem(restartItem);
    CCMenu* nextMenu = CCMenu::menuWithItem(nextItem);

    addChild(backMenu,1);
    addChild(restartMenu,1);
    addChild(nextMenu,1);

    backItem->setPosition(ccp(size.width / 2 - 100, 50));
    restartItem->setPosition(ccp(size.width / 2 , 50));
    nextItem->setPosition(

补充：移动开发 , 其他 ,