Illustrate the behavior of a linear objective function on the polytope.
Color the nodes according to the value the objective function takes
on the vertices (VERTEX_COLORS)
The spring embedder applies an additional force, which tries to arrange the nodes in the z-axis direction
corresponding to the objective function values.
Illustrate the behavior of a linear objective function on the polytope.
The vertices belonging to MINIMAL_FACE and MAXIMAL_FACE are drawn in distinct colors
The spring embedder applies an additional force, which tries to arrange the nodes in the z-axis direction
corresponding to the objective function values.
produce an edge coloring of a bounded graph from local data in the Hasse diagram
Each auxiliary method always returns the visual object it was called with ($this), which makes it easy to build longer method
chains of the kind: VISUAL->DIRECTED_GRAPH->VERTEX_COLORS .