From: John Femiani (JOHN.FEMIANI_at_[hidden])
Date: 2007-04-16 12:38:45
I understand that a 'point' class is quite unnecessary if you are focusing on a purely topological mesh data structure, and that the class should be templatized on the point type as should any class which requires a point in boost. Of course if quaternion's make it into boost I do not see why points should not; both assume a similar coordinate system and have well defined semantics, closely tied with geometric vecters, in affine geometry. Perhaps I should start a thread about 'val_tuple', or wait until something the likes of wykobi makes a submission :)
I don't really know my way around boost yet wrt SoC stuff; Is there a wiki up for this SoC project on googlecode or something so I can keep up to date with your work and also maybe hassle you guys about it in a friendly way?
From: boost-bounces_at_[hidden] [mailto:boost-bounces_at_[hidden]] On Behalf Of Herve Bronnimann
Sent: Monday, April 16, 2007 6:45 AM
Subject: Re: [boost] GSoC: "A Generic Geometric Library"
Fernando: you re right on all counts, those are our intentions...
-- Hervé Sent from my BlackBerry® wireless handheld Please excuse misspellings and typos -----Original Message----- From: Fernando Cacciola <fernando_cacciola_at_[hidden]> Date: Mon, 16 Apr 2007 09:29:54 To:boost_at_[hidden] Subject: Re: [boost] GSoC: "A Generic Geometric Library" Hi John, > I think CGAL has a half-edge (or maybe double-edge) mesh. Right, CGAL offers a halfedge data-structure. Furthermore, the next CGAL version will offer a BGL package that allows users to pass combinatorial data structures (polyhedrons (HE), triangulations, etc), as-is, to BGL algorithms (using external adapatation), or to implement new structure-independent algorithms following the BGL paradigm, like the forthcoming Surface Mesh Simplification package. > I think that it would be good if you can > at least > model the BGL Concepts, so that the BGL algorithms can be applied to > the mesh. > I would consider this a requirement. > There is a much more generic concept than half-edge (HE) meshes > called a 'lath' mesh Interesting. I was just in the need for such a reference, thank you :) > I gather from the boost discussions that nobody has yet even settled > on > a boost-approved point & vector concept or class (uBlas has c_vector, > and gil has point2 but that is kind of internal to the library and not > intended to be for general use). Would this library include those? > IMHO, given that these primitives spread a few computing domains and everyone has its own idea about it, I would refrain from trying to "formalize" them in the current library. Instead, I would make sure the library works fine with your prefered point/vector type. I would just include a simple proof-of-concept primitive. Best -- ------ Fernando Cacciola SciSoft http://certuscode.wordpress.com http://fcacciola.50webs.com http://fcacciola.wordpress.com _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
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