#ifndef __VISIBLERECT_H__
#define __VISIBLERECT_H__
#include "cocos2d.h"
class VisibleRect
{
public:
static cocos2d::Rect getVisibleRect();
static cocos2d::Vec2 left();
static cocos2d::Vec2 right();
static cocos2d::Vec2 top();
static cocos2d::Vec2 bottom();
static cocos2d::Vec2 center();
static cocos2d::Vec2 leftTop();
static cocos2d::Vec2 rightTop();
static cocos2d::Vec2 leftBottom();
static cocos2d::Vec2 rightBottom();
private:
static void lazyInit();
static cocos2d::Rect s_visibleRect;
};
#endif /* __VISIBLERECT_H__ */
/****************************************************************************
Copyright (c) 2013-2014 Chukong Technologies Inc.
Permission is hereby granted,free of charge,to any person obtaining a copy
of this software and associated documentation files (the "Software"),to deal
in the Software without restriction,including without limitation the rights
to use,copy,modify,merge,publish,distribute,sublicense,and/or sell
copies of the Software,and to permit persons to whom the Software is
furnished to do so,subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS",WITHOUT WARRANTY OF ANY KIND,EXPRESS OR
IMPLIED,INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,DAMAGES OR OTHER
LIABILITY,WHETHER IN AN ACTION OF CONTRACT,TORT OR OTHERWISE,ARISING FROM,0)"> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
****************************************************************************/
#include "VisibleRect.h"
USING_NS_CC;
Rect VisibleRect::s_visibleRect;
void VisibleRect::lazyInit()
{
// no lazy init
// Useful if we change the resolution in runtime
s_visibleRect = Director::getInstance()->getOpenGLView()->getVisibleRect();
}
Rect VisibleRect::getVisibleRect()
{
lazyInit();
return s_visibleRect;
}
Vec2 VisibleRect::left()
{
lazyInit();
return Vec2(s_visibleRect.origin.x,s_visibleRect.origin.y+s_visibleRect.size.height/2);
}
Vec2 VisibleRect::right()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width,s_visibleRect.origin.y+s_visibleRect.size.height/2);
}
Vec2 VisibleRect::top()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2,s_visibleRect.origin.y+s_visibleRect.size.height);
}
Vec2 VisibleRect::bottom()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2,s_visibleRect.origin.y);
}
Vec2 VisibleRect::center()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width/2,s_visibleRect.origin.y+s_visibleRect.size.height/2);
}
Vec2 VisibleRect::leftTop()
{
lazyInit();
return Vec2(s_visibleRect.origin.x,s_visibleRect.origin.y+s_visibleRect.size.height);
}
Vec2 VisibleRect::rightTop()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width,s_visibleRect.origin.y+s_visibleRect.size.height);
}
Vec2 VisibleRect::leftBottom()
{
lazyInit();
return s_visibleRect.origin;
}
Vec2 VisibleRect::rightBottom()
{
lazyInit();
return Vec2(s_visibleRect.origin.x+s_visibleRect.size.width,s_visibleRect.origin.y);
}
Sprite* background = Sprite::create("background.png");
background->setPosition(VisibleRect::center());
原来的写法：
Size visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();
@H_138_403@Sprite* background = Sprite::create("background.png");
background->setPosition(origin + visibleSize/2);
是不是变得更简单，更方便了呢？
