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.
The optional parameter LPobject is introduced for the future use, when
it will be possible to store several objective function in a Polytope object.
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
(by default red and yellow).
The spring embedder applies an additional force, which tries to arrange the nodes in the z-axis direction
corresponding to the objective function values.
The optional parameter LPobject is introduced for the future use, when
it will be possible to store several objective function in a Polytope object.
Show the growth direction of a linear objective function via arrowed edges.
The optional parameter LPobject is introduced for the future use, when
it will be possible to store several objective function in a Polytope object.
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 .