基才CAD的三维实体造型方法探讨

介绍了设置图层、视口及调出工具栏等创建三维实体造型环境的方法。通过创建一个较负杂的三维实体造型的典型实例，介绍了基于CAD三维实体造型的方法与技巧，包括对象捕捉等精确绘图方法，从平面二维作图状态切换到三维视图的方法，从平面图形生成面域的方法，通过拉伸平面图形生成三维实体的方法，以及布尔运算的差、并、交集运算。介绍了用户坐标系的建立方法及用户坐标系在创建三维实体造型中的应用。

Discuss on Method of 3D Entity Modeling based on CAD

Layer setting, the viewport, and toolbar calling were introduced to create 3D entity modeling method of envi- ronment in the paper, by creating a more complex 3D solid modeling of typical instance about CAD based on 3D entity mod- eling method and skill including object capture accurate mapping methods, such as from two-dimensional drawing state to switch to the 3D view method, generated surface domain from the plane figure, generated 3D entity through tensile plane figure and Boolean difference set operations. Boolean set operations, Boolean intersection operation, introduced the methods to set up the user coordinate system and the user coordinate system in creating the application of the three-dimensional entity model.