识图中投影特点的运用

Application of projection characteristics in learning engineering drawing

分析了点线面的投影特点:在V、H、W投影中至少有一个是类似或实形(长)投影.根据这一特点,可想象出线面及由面所围成的体在空间的大致存在形式.提出了如何根据投影特点,做出类似或实形(长)投影,加快识图和作图过程,提高其空间想象能力.

From the projection characteristics of the point line plane, we can conclude: Their projection has at least a similar or solid form (long) projection. It's easy to imagine how do the lines; planes and solids exist in fact. This text related how to make the similar or solid projection according to the projection characteristics, and how to educate the space to think the elephant ability.