获取图片旋转后的坐标点

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--图片旋转后的坐标点
--在图片里添加四个端点，通过四个端点来获取图片坐标点。
function GameScene:createLayerFarm()    local layerFarm = cc.Layer:create()--图片精灵 width 100  height 200    self.shell_22 = cc.Sprite:create("100-200.png")    self.shell_22:setPosition(cc.p(200,200))    self.shell_22:setAnchorPoint(cc.p(0.5, 0))    self:addChild(self.shell_22, 20)--创建ImageView对象    self.up_left = ccui.ImageView:create()    self.up_right = ccui.ImageView:create()    self.down_left = ccui.ImageView:create()    self.down_right = ccui.ImageView:create()        --设置四个端点的坐标 [100 图片的宽度 200 图片的高度]    self.up_left:setPosition(cc.p(0,200))--右上角    self.up_right:setPosition(cc.p(100,200))--右下角    self.down_left:setPosition(cc.p(0,0))--左下角    self.down_right:setPosition(cc.p(100,0))--右下角    --添加到旋转的图片中    self.shell_22:addChild(self.up_left)    self.shell_22:addChild(self.up_right)    self.shell_22:addChild(self.down_left)    self.shell_22:addChild(self.down_right)        local upLeftPos = self.up_left:getWorldPosition()    print("upLeftPos : ", upLeftPos.x, " upLeftPos : ", upLeftPos.y)        local up_rightPos = self.up_right:getWorldPosition()    print("up_rightPos : ", up_rightPos.x, " up_rightPos : ", up_rightPos.y)        local down_leftPos = self.down_left:getWorldPosition()    print("down_leftPos : ", down_leftPos.x, " down_leftPos : ", down_leftPos.y)        local down_rightPos = self.down_right:getWorldPosition()    print("down_rightPos : ", down_rightPos.x, " down_rightPos : ", down_rightPos.y)--触摸处理事件处理方法    local function onTouchBegan(touch, event)        local location = touch:getLocation()        -- CCTOUCHBEGAN event must return true        -------------------------------------------------------------------                local originX, originY = self.shell_22:getPosition()                local direction = cc.p(location.x - originX, location.y - originY)        local degree = math.atan2(direction.y, direction.x)        print("degree : ", degree)        self.shell_22:setRotation(90-degree*180/math.acos(-1.0))        --获取图片旋转后的图片端点        local upLeftPos = self.up_left:getWorldPosition()        print("upLeftPos : ", upLeftPos.x, " upLeftPos : ", upLeftPos.y)        local up_rightPos = self.up_right:getWorldPosition()        print("up_rightPos : ", up_rightPos.x, " up_rightPos : ", up_rightPos.y)        local down_leftPos = self.down_left:getWorldPosition()        print("down_leftPos : ", down_leftPos.x, " down_leftPos : ", down_leftPos.y)        local down_rightPos = self.down_right:getWorldPosition()        print("down_rightPos : ", down_rightPos.x, " down_rightPos : ", down_rightPos.y)        --通过上面获的端点来绘制矩形区域        local drawNode = cc.DrawNode:create()        local vertices =             {                cc.p(down_leftPos.x,down_leftPos.y),  --左下角                 cc.p(down_rightPos.x,down_rightPos.y),  --右下角                cc.p(up_rightPos.x,up_rightPos.y),  --右上角                cc.p(upLeftPos.x,upLeftPos.y)   --左上角            }--绘制边框        drawNode:drawPoly(vertices, 4, true, cc.c4f(1,0,0,1))        self:addChild(drawNode, 20)                return true    end    return layerFarmend
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