Delphi源码实现的不规则窗体，非矩形窗口，绘制一个五角星窗体，大致的实现思路：创建一个多边形的区域，绘制多边形窗体，设置窗体初始背景颜色，使窗体始终保持在最前，设定画笔大小，绘制多边形轮廓线，恢复窗体正常位置和显示属性。-Delphi source code to achieve the irregular form, non rectangular window, draw a star form, ideas to achieve roughly: create a polygon ar

绘制网络包络线，能够绘制最大外界轮廓，并求得轮廓的体积-The network envelope can be drawn, and the maximum external contour can be drawn