The drafting method proposed in this paper is more convenient and simple than ever before.This method sets the angle between main elevation and picture plan as 30 degree and sets the measuring point by means of the parallel line of picture plan,and then an ideal two_point perspective has been drafted in a simpler way.
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吴明珠.两点透视一个新的作图法——30°法[J].土木与环境工程学报(中英文),1999,21(3):119-121. WU Ming_zhu.[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,1999,21(3):119-121.10.11835/j. issn.1674-4764.1999.03.025