On the basis of analytic geometry, the projection curve types of intersection lines of cone and cylikder, cone and cone on V plane is hyperbola and cone and sphere is parabola.
英
美
- 中專(zhuān)制圖教科書(shū)中 ,對圓柱與圓錐軸線(xiàn)垂直相交時(shí) ,相貫線(xiàn)投影作圖 ,大都采用先找特殊點(diǎn) ,再用輔助平面法找一般點(diǎn) ,最后判斷點(diǎn)的可見(jiàn)性并描點(diǎn)連線(xiàn)的方法。
