Thus the coordinate pair (100, 75) indicates a position on the screen that is 100 pixels inward from the left edge of the window and 75 pixels down from the top.
所以坐标(100,75)指出在屏幕上的位置就是屏幕左边缘往里100个像素，从上往下75个像素的地方。
It retrieves the dimensions of the desktop and the window then calculates the appropriate coordinate of the left upper corner of the window to make it center.
它重新获取桌面和窗口的尺寸规格，然后计算窗口左上角合适的坐标来使它位于屏幕中心。
Hexagonal grid coordinate and the relation of the circle window and the line to be clipped are demonstrated.
首先介绍了六角网格坐标系及圆形窗口与待裁剪线段的关系。
应用推荐