Cocos2d-x_3.2 Demo学习之VisibleRect类

 1 class VisibleRect
 2 {
 3 public:
 4     static cocos2d::Rect getVisibleRect();// 获取屏幕矩形
 5 
 6     static cocos2d::Vec2 left();        // 左中，
 7     static cocos2d::Vec2 right();        // 右中
 8     static cocos2d::Vec2 top();        // 顶中
 9     static cocos2d::Vec2 bottom();    // 底中
10     static cocos2d::Vec2 center();        // 中心
11     static cocos2d::Vec2 leftTop();    // 左顶
12     static cocos2d::Vec2 rightTop();    // 右顶
13     static cocos2d::Vec2 leftBottom();    // 左底
14     static cocos2d::Vec2 rightBottom();    // 右底
15 private:
16     static void lazyInit();// 获取屏幕矩形
17     static cocos2d::Rect s_visibleRect;// 用于保存屏幕矩形
18 };

 1 void VisibleRect::lazyInit()
 2 {
 3     s_visibleRect = Director::getInstance()->getOpenGLView()->getVisibleRect();
 4 }
 5 
 6 Rect VisibleRect::getVisibleRect()
 7 {
 8     lazyInit();
 9     return s_visibleRect;
10 }
11 // (0,width/2)
12 Vec2 VisibleRect::left()
13 {
14     lazyInit();
15     return Vec2(s_visibleRect.origin.x, s_visibleRect.origin.y+s_visibleRect.size.height/2);
16 }
17 // (width,height/2)
18 Vec2 VisibleRect::right()
19 {
20     lazyInit();
21     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width, s_visibleRect.origin.y+s_visibleRect.size.height/2);
22 }
23 // (width/2,height)
24 Vec2 VisibleRect::top()
25 {
26     lazyInit();
27     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2, s_visibleRect.origin.y+s_visibleRect.size.height);
28 }
29 // (width/2,0)
30 Vec2 VisibleRect::bottom()
31 {
32     lazyInit();
33     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2, s_visibleRect.origin.y);
34 }
35 // (width/2,height/2)
36 Vec2 VisibleRect::center()
37 {
38     lazyInit();
39     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2, s_visibleRect.origin.y+s_visibleRect.size.height/2);
40 }
41 // (0,height)
42 Vec2 VisibleRect::leftTop()
43 {
44     lazyInit();
45     return Vec2(s_visibleRect.origin.x, s_visibleRect.origin.y+s_visibleRect.size.height);
46 }
47 // (width,height)
48 Vec2 VisibleRect::rightTop()
49 {
50     lazyInit();
51     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width, s_visibleRect.origin.y+s_visibleRect.size.height);
52 }
53 // (0,0)
54 Vec2 VisibleRect::leftBottom()
55 {
56     lazyInit();
57     return s_visibleRect.origin;
58 }
59 // (width,0)
60 Vec2 VisibleRect::rightBottom()
61 {
62     lazyInit();
63     return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width, s_visibleRect.origin.y);
64 }