Convenience constructors for the four-corner tetrahedron masks used by
edges.recursive.tetrahedron.mask() and
recursive.tetrahedron.mask.surface.graph(). The slots
correspond to the four corner subtetrahedra created by one barycentric
refinement of a tetrahedron.
mask.tetrahedron.classic()mask.tetrahedron.corner.missing(
omit = c("apex", "base_left", "base_right", "base_back")
)
A named logical vector of length 4.
Which tetrahedron corner is omitted in
mask.tetrahedron.corner.missing().
The returned mask entries are ordered and named as base_left,
base_right, base_back, and apex.