The methods described below can be used to add more details to drawings created by the following visualization methods:

Polytope::SCHLEGEL | SchlegelDiagram::VISUAL

DIRECTED_GRAPH ([ LPobject ])
Illustrate the behavior of a linear objective function on the polytope. Superpose the drawing with the directed graph induced by the objective function.
VERTEX_COLORS ([ LPobject ])
Illustrate the behavior of a linear objective function on the polytope. Color the vertices according to the values of the objective function.
TRIANGULATION_BOUNDARY
Draw the edges of the TRIANGULATION_BOUNDARY
STEINER
Add the STEINER_POINTS to the 4-d visualization

Each auxiliary method always returns the visual object it has called with ($this), which makes it easy to build longer method chains of the kind: VISUAL->DIRECTED_GRAPH->VERTEX_COLORS .