wall.addfacet
Syntax
Add a facet. The proposed facet must share {a vertex in 2D; an edge in 3D} with an existing facet.
f - facet pointer
w - wall pointer
v - vertex position
a - In 2D, either the additional vertex position or a pointer to an existing vertex can be specified. In 3D, any mixture of vertex positions and pointers to existing vertices can be specified.
wall.typeid
wall.closed
9.1.13