ug二次开发，模型分层软件，可用于各形状零件的模型分层-ug secondary development of layered software model can be used to form part of the hierarchical model

简单的stl读取，显示，切片程序代码，很好用，在slice_STL基础上进行了改进，并加入了相关注释~-Simple slice stl display program code, easy to use, on the basis of the slice_STL improved, and joined the relevant Notes