Drawing method of intersection lines resulting form plane cutting planar solid based on intersection points

Planar solid cutting by plane is a complex three-dimensional knowledge point in drawing course.There are so many points,lines,planes and spatial structures in such drawing course.So biginners often have lots of problems such as missing and incorrect lines,or error visibility judgment of lines while studying this part.A new method based on simple intersection points to analyze complex plane cutting planar solid is introduced in this paper.And better learning effects have reached during several semesters by guiding students in using this method.