On Sat, Mar 29, 2008 at 4:04 PM, mhampton <[EMAIL PROTECTED]> wrote: > > For the brave of heart, I have my current effort up on trac as ticket > #2716. > > I hope to add a number of other things and make the polyhedral classes > more intelligent. Again, I would appreciate any thoughts on how > polyhedral objects in Sage should be organized.
I don't know how useful this is but I would like to see all the "geometric" functionality of the GAP package TORIC http://www.opensourcemath.org/toric/ implemented. It is almost all combinatorial geometry, so this seems to me relevant to what you are going. Does it seem relevant to you? > > -M. Hampton > > > > On Mar 29, 7:28 am, mhampton <[EMAIL PROTECTED]> wrote: > > I guess my plan for the moment is to work inside sage/geometry/ > > polytope, and mostly imitate the structure of the polymake interface > > using only cddlib. About 90% of the functionality of polymake should > > be quite easy redo. > > > > -M. Hampton > > > > On Mar 28, 6:46 pm, mhampton <[EMAIL PROTECTED]> wrote: > > > > > Hi everybody, > > > > > Recently while working on the gfan interface I starting thinking about > > > adding some other polytope-related functionality to Sage, but I am not > > > sure how it should be organized. The classes I created in gfan > > > (probably to be sage-2.11) are somewhat ad-hoc. > > > > > In the near future I plan on adding 3D groebner fans to the gfan > > > interface; this is not something gfan itself can display. To do this > > > I finally wrote some code that I have wanted for a long time: a direct > > > interface to cddlib to convert back and forth from vertex descriptions > > > and "facial" descriptions (i.e. inequalities/half-planes and > > > equalities). (Previously I would install the optional polymake > > > package to do this, but that is massive overkill for the very limited > > > functionality I need.) > > > > > Currently my functions just spit out the relevant data as lists, but I > > > think I should encapsulate them in some sort of Polytope class. This > > > is not my forte so I welcome comments and suggestions. I will soon > > > post some code on trac, but I think the design issue is somewhat > > > independent of my particular code. > > > > > Thanks, > > > Marshall Hampton > > > --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-devel@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-devel URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
