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Re: [PSUBS-MAILIST] DXF Files
Blah. They vary dramatically with ever version, and are implementation
dependent. They are ascii, human readable files, with binary definition
codes inserted at critical intervals. You can actually open one and read
it if it is a simple part. It just defines coords and basic entities. You
will find a wealth of information on google. VRMLs are much cleaner files.
Warren.
>
> How do dxf files work? I am very curious.
> I have used them for years and have no inkling.
> Jay.
>
>
>
>
>
> "Warrend Greenway"
> <dub@linuxmail.org> To: personal_submersibles@psubs.org
> Sent by: cc:
> owner-personal_submersible Subject: Re: [PSUBS-MAILIST] OSS
> s@psubs.org
>
>
> 12/01/2003 10:42 PM
> Please respond to
> personal_submersibles
>
>
>
>
>
>
> DXF can store 2D. ??? What format would your recommend? I actually hate
> DXFs since I know
> how they work! I only recommended them because every CAD program I know of
> can utilize them.
>
> Warren.
>
> > No DXF!!! 2D only!
> >
> > DWG or SAT for 3D (volume, mass info)
> >
> > Pierre
> >
> >
> >
> >
> >
> >
> > >From: "Warrend Greenway" <dub@linuxmail.org>
> > >Reply-To: personal_submersibles@psubs.org
> > >To: personal_submersibles@psubs.org
> > >Subject: Re: [PSUBS-MAILIST] OSS
> > >Date: Mon, 13 Jan 2003 09:31:52 +0800
> > >
> > >OK. You have a lot of opinions. :) Ready to help compile that list of
> those
> > >interested
> > >and the skills they bring to the table? A landlubber is perfectly
> suited.
> > >Furthermore,
> > >you seem to grasp the situation perfectly. I don't think we need to
> worry
> > >about a new
> > >server at this point, but I have a server I would offer to the cause if
> it
> > >ever got to
> > >that point. What I would like to see is everyone who has expressed
> interest
> > >to either
> > >post their wish-list or e-mail them to myself or you...:) So we can
> compile
> > >a preliminary
> > >spec. It will probably change a bit as time goes on, but it will give us
> a
> > >place to start!
> > >Please, all, spec the following:
> > >1. Length
> > >2. Diameter
> > >3. Speed
> > >4. Range or dive time
> > >5. Safe dive depth
> > >6. Cost window
> > >7. Further comments
> > >
> > >It seems like lead acid is the power source of choice. I can handle a
> PWM
> > >speed control,
> > >so I don't think we need to worry about potentiometers or anything like
> > >that. Batteries
> > >and motor should probably be stored outside the pressure hull. Steel
> seems
> > >to be the
> > >pressure hull material of choice. Gauges and electronics should be left
> > >flexible, to
> > >accomodate a variety of tastes, needs, and budgets.
> > >
> > >Let's agree to use DXF for electronic drawings and TXT or HTML for text.
> > >
> > >Warren.
> > >warrend@decagon.com
> > >
> > >
> > > > Good Evening all,
> > > >
> > > > I just read all the posts since this morning... wow! You've been
> busy.
> > > >
> > > > OK... here goes. Carsten had some good points. I think if I spent
> > > > hours on end burning the midnite oil and then saw that somebody was
> > > > selling the plans in the back of Popular Mechanics... and getting
> rich,
> > > > I'd be furious.
> > > >
> > > > Now... open source does not necessarily mean the project could not be
> > > > turned to profit making. There are lots of people making money from
> > > > Linux, after all. I also wonder how we might control anyone who did
> > > > decide to take the OSS design and start building and selling it...
> > > > copyleft documents would not do.... as such documents do in fact
> allow
> > > > one to reproduce and sell it. We need rather, a patent on any
> > > > intelectual property in the design to do this.
> > > >
> > > > I think that the best way to control commercial use of the project
> would
> > > > be to design it such that it would not be commercially viable. I.e.:
> a
> > > > one person submersible could never be used to "give rides", and the
> > > > potential market for such a machine would be negligible. Liability
> > > > would kill it before the first dozen had hit the water.
> > > >
> > > > The other thing is that it should be stressed concept only. The idea
> > > > would be for people to build their own machines to the specifications
> in
> > > > the project documents... not for anyone to try to market a kit to be
> > > > assembled.
> > > >
> > > > If we produce the plans and the documentation... this material could
> and
> > > > most certainly would be copyrighted. It could be distributed free of
> > > > charge in electronic form. Just the fact that we would be giving it
> > > > away free would discourage competition.
> > > >
> > > > A separate list with url... well, it certainly could be done, but how
> > > > big a monster is this going to become? Do we need a new list? Do we
> > > > need a new server... possibly with a forum? Right now this is all
> new
>
> > > > and exciting... like the new girl in school... but the early interest
> > > > may fade as the drudgery hits.
> > > >
> > > > A camel has been described as a horse designed by comittee... but
> then,
> > > > a camel is a pretty impressive piece of technology. Even though God
> > > > likely did not consult a comittee upon finalizing the two or three
> > > > designs, the concept is still valid. I think that this would
> function
> > > > best if somebody would take charge and start assigning tasks as soon
> as
> > > > possible.
> > > >
> > > > We perhaps need to compile a list of who is interested. We could
> easily
> > > > form our own mail list and take it off the psub list... but you know
> > > > what? I suspect that even those not participating would find the
> > > > project of interest and it would be a simple matter to set filters up
> to
> > > > shunt anything with "OSS" in the subject line to a specific location.
> > > >
> > > > A wish list might be one of the first things to be enumerated... just
> as
> > > > soon as we know who we are.
> > > >
> > > > This could work. For some reason I don't understand, there seems to
> be
> > > > quite a bit of commeradery here... and little or no bickering.
> > > >
> > > > OK, enough from the landlubber. I've already put out my "wish list"
> and
> > > > mentioned how I think I might be able to help. I'm going to sit back
> > > > and watch until somebody tells me to go out and get an original copy
> of
> > > > the plans for Trieste or something.
> > > >
> > > >
> > > >
> > > >
> > > > Dale A. Raby
> > > > Editor/Publisher
> > > > The Green Bay Web
> > > > http://www.thegreenbayweb.com
> > ><< dalesignature.gif >>
> > >
> > >--
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>
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