According to the nature of projective scale, it has solved the problem of drawing a cars perspective when perspective vanishing point is out of the drafting board.

文中利用射影几何中射线比的特殊性质，解决了透视灭点在图板外的透视图画法。

youdao

According to the nature of projective scale, it has solved the problem of drawing a cars perspective when perspective vanishing point is out of the drafting board.

文中利用射影几何中射线比的特殊性质，解决了透视灭点在图板外的透视图画法。

youdao