Driven by consumer needs, soil release polymers perform where other technologies fail. Repel-O- Tex ® Crystal is a protective shield against ... ... <看更多>

Internally, a crystal shape is represented as a list of faces which are bounded by a list of vertices. cS.V ans = vector3d size: 12 x 1 ... ... <看更多>

A crude fix: try draw(Ed --(Ed+0.92(Ea-Ed)), red, arrow=EndArrow3(size=12));. enter image description here. ... <看更多>