画法几何综合问题三维分析系统的研究

Study on 3D Analysis System of Descriptive Geometry

在画法几何的教学中,学生学习的难点是对画法几何综合问题的空间分析能力较弱,而教师在分析此类问题时缺少有效的计算机三维建模手段。本研究借助于AutoCAD 2000,用Visual LISP语言进行二次开发,通过三维重建法使画法几何问题得以在三维空间中分析求解。依据画法几何的作图特点,设计了二维和三维的几何作图功能,采用VB设计出画法几何的三维分析系统,对提高学生三维空间的分析能力起到重要作用。

In teaching descriptive geometry, the difficulty for students is need to solve a complex problem analyzed in 3D space, but there is no effective ways dealing with the problems with the computes. Now a 3D analysis system to solve the complex problems of descriptive geometry using AutoCAD 2000 and Visual LISP are developed. The system has the features of solving descriptive geometry problems, and provides functions of 2D and 3D geometric drafting or modeling. This system is developed using VB and plays important roles in enhancing the analysis abilities of students in leaning.