cocos-lua test 学习之 VisibleRect.lua

VisibleRect = class("VisibleRect")
VisibleRect.__index = VisibleRect


VisibleRect.s_visibleRect = cc.rect(0,0,0,0)

function VisibleRect:lazyInit()
    if (self.s_visibleRect.width == 0.0 and self.s_visibleRect.height == 0.0) then
        --[[
        local pEGLView = cc.EGLView:getInstance()
        local origin   = pEGLView:getVisibleOrigin()
        ]]--
        local director = cc.Director:getInstance()
        --以点为单位返回OpenGL视图的可见原点坐标
        local origin = director:getVisibleOrigin()
        --以点为单位返回OpenGL视图的可见大小
        local visibleSize = director:getVisibleSize()
        
        self.s_visibleRect.x = origin.x
        self.s_visibleRect.y = origin.y
        self.s_visibleRect.width  = visibleSize.width
        self.s_visibleRect.height = visibleSize.height
    end
end

function VisibleRect:getVisibleRect()
    self:lazyInit()
    return cc.rect(self.s_visibleRect.x, self.s_visibleRect.y, self.s_visibleRect.width, self.s_visibleRect.height)
end

function VisibleRect:left()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x, self.s_visibleRect.y+self.s_visibleRect.height/2)
end

function VisibleRect:right()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width, self.s_visibleRect.y+self.s_visibleRect.height/2)
end

function VisibleRect:top()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width/2, self.s_visibleRect.y+self.s_visibleRect.height)
end

function VisibleRect:bottom()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width/2, self.s_visibleRect.y)
end

function VisibleRect:center()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width/2, self.s_visibleRect.y+self.s_visibleRect.height/2)
end

function VisibleRect:leftTop()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x, self.s_visibleRect.y+self.s_visibleRect.height)
end

function VisibleRect:rightTop()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width, self.s_visibleRect.y+self.s_visibleRect.height)
end

function VisibleRect:leftBottom()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x,self.s_visibleRect.y)
end

function VisibleRect:rightBottom()
    self:lazyInit()
    return cc.p(self.s_visibleRect.x+self.s_visibleRect.width, self.s_visibleRect.y)
end

• --以点为单位返回OpenGL视图的可见原点坐标 
  local origin = director:getVisibleOrigin()
• --以点为单位返回OpenGL视图的可见大小 
  local visibleSize = director:getVisibleSize()

由于近段时间比较忙，所以就先选择了这一篇比较简单的进行学习（其实也就只有 director:getVisibleOrigin()和 director:getVisibleSize()两个函数而已。。），所以这一篇的质量相对较差。