-------------------------------------------------- From: "Bruno Lalande" <bruno.lalande@gmail.com> Sent: Monday, October 27, 2008 11:11 AM To: <boost@lists.boost.org> Subject: Re: [boost] Preview 3 of the Geometry Library
In looking more at Brandon's code, I have to repeat my observation that he has done an impressive job of defining a generic geometry type system and using boost libraries to do it. I think that if we make his accessor dimension agnostic (either runtime or compile time indexing) we have a winner.
Indeed, it's a very interesting part of his library. Unfortunately we really have to find a consensus about the compile-time / runtime access before we can do anything together... Maybe I will open a new thread about this precise subject.
Brandon if you read this, there's a typo at 3 places of your code: "dimenstion" instead of "dimension".
Sorry for the double reply, but I thought I should point out that my latest code-base also tackles the run-time/compile time access issue via specialization of the access types. I have a type indexed_access_traits which is specialized for coordinate_sequences (of which point and vector types specialize via coordinate_sequence_traits). The specialization of indexed_access_traits incorporates a flag which says whether the code should use run time access or compile time access for each particular coordinate_sequence type. If the user's point/vector types have either get<Index> or operator[] for the corresponding compile-time/run-time accessor.. then they can simply use a supplied macro to declare their point as a valid coordinate_sequence type... and all the indexed_access_traits work for free. I've even been playing around with operators for dot product and scalar arithmetic on vector types defined using this mechanism... so all in all pretty good stuff in my code base so far. I've also tacked the reference frame issue a bit.. providing mechanisms for users to use either implicit frame transforms or to proceed as if they are in complete control of the state at any given time. Please do have a look. I would love to hear feedback from any who are interested. Cheers, Brandon P.S. (This is a preliminary site that a friend put together for me.... the text is a bit brash :D.... please ignore and go to the download link to find SVN access.) http://gengeomalg.sourceforge.net/
Regards Bruno _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost