hi, all. I want to simulate a point's movement in space, Is there any simple way to do that? thanks --------------------------------- 雅虎邮箱传递新年祝福,个性贺卡送亲朋! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://www.vtk.org/pipermail/vtkusers/attachments/20080222/64a5e93a/attachment.htm>