Intersection of Two Solids(两立体相交)

If two solids intersect each other, it is interpenetration(or intersection).such combination is called intersection of solids,its surface produces one or more boundaryis called intersection curves.When the two solidsinterpenetration, it divide into three species basis of the geometric characteristics of solids:

1) Intersection of two polyhedral solids(see Fig.3-18a);

2) Intersection of a polyhedral solid and a curved solid (see Fig.3-18b);

3) Intersection of two curved solids (see Fig.3-18c).

In the following section of this chapter, we mainly discuss the intersection of a polyhedral solid and a curved solid and intersection of two curved solids.