#7109: [with patch, needs review] polyhedra bugs with linearities, rewrite
proposal
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Reporter: vbraun | Owner: mhampton
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-feature
Component: geometry | Keywords: polyhedra
Work_issues: | Author:
Reviewer: | Merged:
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Comment(by mhampton):
I don't think that the speed difference is entirely due to the correct
handling of equalities - even for bounded polyhedra described by either
vertices or inequalities it is slower by the factor of 2 to 3. Maybe the
list caching won't help this much, but then I wonder what is really
responsible.
I agree, the linearities keyword was very fragile and often didn't work
correctly, so perhaps its not necessary to keep it at all.
For back-compatibility I will add back the render_wireframe, render_solid,
and schlegel_projection methods of Polyhedron. We could put in
deprecation warnings advising people to switch to the new functions for
projections and rendering. I would also like to make the new rendering
commands more flexible, so that one can choose to display any combination
of vertices, edges, and/or faces. I am happy to do all that.
Looks like there are some other older methods missing, like
simplicial_complex, but I haven't looked at all of them in detail yet.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/7109#comment:19>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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