画法几何综合问题三维分析系统的分析-机械设计及理论专业论文.docxVIP

摘要摘要 摘要 摘要 关键词：CAI，三维重建，画法几何，分析系统 近年来，随着计算机辅助教育的深入发展，计算机辅助教学技术在教学领域 已得到广泛应用。但在多年从事画法几何的教学工作中发现，学生在涉及画法几 何综合问题时，缺乏空间想象力，而教师在分析此类问题时，缺少有效的三维建 模手段。随着教育发展的需要，教师和学生迫切需要有关三维重建的CAI软件。 有鉴于此，我们在国内外率先创新地开展了画法几何综合问题三维分析方法的研 究。 本文借助于Auto CAD2000的平台，用Visual LISP语言对其进行二次开发， 阐述了三维重建的设计方法，提出了把画法几何中二维的点、线、面的投影转化 为三维的空间元素，使画法几何问题得以在三维空间中分析求解；分析了画法几 何综合问题的解题方法，并结合画法几何的作图特点，设计了二维和三维的几何 作图功能系统；采用VB设计出画法几何的三维分析系统，并通过举例讨论了它 在画法几何中的应用。 本研究是针对画法几何课程的需要而开发的，具有很强的针对性和实用性。 该系统具有友好的人机界面、功能强、使用方便，对提高教学质量和改进教学方 法、促进学生能力培养与三维空间思维训练起到重要作用。 AbstractAbstract Abstract Abstract Key Words：CAI，3D reconstruction，Descriptive Geometry,analysis system In resent years，诵tll the development of Computer Based Education，the technology of Computer Aided Instruction has been widely used in the fields of teaching．But from many years of teaching Descriptive Geometry,students are short of dimensional imaginations and teachers are pressed of effective artifices about 3D modeling in dealing with Descriptive Geometry compositive problems．With the developing of education，the corresponding CAI software is required exigently．For this reason，we have started the research of 3D analysis in Descriptive Geometry compositive耻DblemS_—3D reconstruction firstly in China． nlis dissertation applies Visual LISP to redevelop Auto CAD2000 with its platform，clarifies the design of 3D reconstruction to solve 2D projections of po诚， line and plane which Can transform 3D space elements，allows the graphic analysis of Descriptive Geometry to be solved in 3D space．The dissertation analyzes graphic methods and integrates graphic features，then provides a design of geometry graphic system of 2D and 3D．3D analysis system of Descriptive Geometry is designed by means of VB，its application is discussed with examples in Descriptive Geometry． The research is proper and worth for practical purpose in Descriptive Geometry． nle system is highly effective．convenient and use．friendly,and it plays very important roles in improving teaching ways and qualities，e