[cpp-tests] 围绕某个精灵(点)作圆周运动

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cocos2d-x-3.2: cpp-tests

.h:

class SpriteTestDemo : public BaseTest{protected:    std::string    _title;public:    SpriteTestDemo(void);    virtual ~SpriteTestDemo(void);    void restartCallback(Ref* sender);    void nextCallback(Ref* sender);    void backCallback(Ref* sender);    // overrides    virtual std::string title() const override;    virtual std::string subtitle() const override;    virtual void onEnter() override;};

class SpriteAnchorPoint : public SpriteTestDemo{public:    CREATE_FUNC(SpriteAnchorPoint);    SpriteAnchorPoint();    virtual std::string title() const override;    virtual std::string subtitle() const override;};

cpp实现：

SpriteAnchorPoint::SpriteAnchorPoint(){    auto s = Director::getInstance()->getWinSize();        auto rotate = RotateBy::create(10, 360);    auto action = RepeatForever::create(rotate);        for(int i=0;i<3;i++)     {        auto sprite = Sprite::create("Images/grossini_dance_atlas.png", Rect(85*i, 121*1, 85, 121) );        sprite->setPosition( Vec2( s.width/4*(i+1), s.height/2) );                auto point = Sprite::create("Images/r1.png");        point->setScale( 0.25f );        point->setPosition( sprite->getPosition() );        addChild(point, 10);                switch(i)         {            case 0:                sprite->setAnchorPoint( Vec2::ANCHOR_BOTTOM_LEFT );// 左下角                break;            case 1:                sprite->setAnchorPoint( Vec2::ANCHOR_MIDDLE );// 中心                break;            case 2:                sprite->setAnchorPoint( Vec2::ANCHOR_TOP_RIGHT );// 右上角                break;        }                point->setPosition( sprite->getPosition() );        sprite->runAction( action->clone() );        addChild(sprite, i);    }        }std::string SpriteAnchorPoint::title() const{    return "Testing Sprite";}std::string SpriteAnchorPoint::subtitle() const{    return "anchor point";}

效果图：

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