用投影变换方法解决画法几何问题的研究

The method research of projection transformation graphic descriptive geometry problem

介绍换面法、旋转法和斜投影法等三种投影变换方法,并分析各自的画法特点,指出每种方法可解决的画法几何类型题,并进一步总结出每一种投影方法最适合解决的类型题.

The paper mainly introduces the three methods of projection transformation , namely the changing surface method, rotation method and oblique projection method. And analyses the characteristics of three methods of projection transformation in descriptive aspects. And points out that the projection transformation method is usually used to solve some pictorial, graphic problems that orthographic projection method can not solve. Studies the descriptive geometry graphic type of each method to solve the problem. Through comparative study, summarizes the most suitable type of problem that each projection method can solve. The most suitable type of problem solving refers to the problem solving process when using some methods is not only quick but also simple.