In this paper, AUTOLISP's entity function is used for obtaining graphic data of stamping part of any shape.
利用AUTOLISP的实体功能实现对任意形状冲裁件的图形数据的提取。
The paper adopts graph method to study 3d entity graphic conversion, and the parameter formulas of the graphic transformation matrix of the several special displays are clearly obtained.
采用图解法探讨三维实体的图形变换，明确给出了几种特殊显示的图形变换矩阵的参数表达式。
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