显示autocad缩略图，个人觉得不错，所以拿出大家-Show thumbnails autocad, personal feel that good, so we come up with

上大学时候的一个习作，是模仿国外一个截图软件做的。它不但可以抓图，而且还可以选择抓图的形状，比如圆形、方形、三角形等。还有其它的一些辅助功能有很多-When one exercises in college, is an imitation of a screenshot of foreign software to do. It can not only drawings, but can also choose the shape of drawings, such as round, sq

From: http://clootie.narod.ru/delphi/download_custom.html ParticleSystem1 - unidirectional generator sample Main idea of this sample was to demonstrate right and wrong ways of generating uniform distribution of unit length vectors - so end-poi