Polygons/Polyhedra over-approximation in plots

[albertocasagrande]

83cb873a85530c8982e24056b3a6332767b7e4ca over-approximates polygons/polyhedra in plots as if some of the half-spaces defining them were missing. For instance, the set

is depicted as

Use this SIL file to reproduce the issue.

[albertocasagrande]

The issue is due to a relatively high value (i.e., 0.01) for the tolerance in the function computeLinearSystemVertices. Unfortunately, we cannot get rid of the tolerance, but we can reduce it, for instance, to 1e-8.

[albertocasagrande]

Closed by e60d3d00f6c18352c51fc3943565155a27eef843