#10140: Base sage.geometry.cone on the Parma Polyhedra Library (PPL)
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Reporter: vbraun | Owner: mhampton
Type: enhancement | Status: needs_info
Priority: major | Milestone: sage-4.7
Component: geometry | Keywords: ppl
Author: Volker Braun | Upstream: N/A
Reviewer: Andrey Novoseltsev | Merged:
Work_issues: |
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Comment(by vbraun):
I think its easier to just go with PPL's ordering. It also matches the
behaviour of the Polyhedron class which will reorder generators. We
already have the `Cone_of_fan` to keep track of ray orderings with respect
to some particular enumeration of rays.
I can add back in a check that the polyhedron is really a cone, perhaps
tomorrow. Generating a Cone from a Polyhedron is only for convenience, I
don't see any need to make it fast. All actual computations are now done
with PPL.
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/10140#comment:25>
Sage <http://www.sagemath.org>
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