Re: [SLUG] Real World Class 3D modeler for Linux

From: Mario Lombardo (mario@alienscience.com)
Date: Sat Jun 09 2007 - 13:21:31 EDT


So Rhino is good with CAD -> CAM too? I've recently been on the hunt
for such a thing. I've never heard of Rhino. The other day, I found
this:
http://www.alibre.com/promos/online/free-cad.asp

I know nothing about it.

On 6/8/07, Ken Elliott <kelliott11@cfl.rr.com> wrote:
> >> If you can design tanks with it you can design anything with it.
>
> Far from it. Tanks are simple geometry. Streight edges, flat sides, etc.
> Items with smooth curved surfaces are much more difficult. Think car
> bodies, boats, consumer goods.
>
> Compare the Stealth Figher vs. the B2 Stealth Bommer. The figher is all
> flat sides due to the limitations of the software and cpu horsepower used at
> the time. NURBS and fast computers allowed for the complex calculations
> required for a complex curved surfaces.
>
> But if you disagree, that's fine. I've only been using CAD systems for 25
> years and I could be wrong...
>
> Ken Elliott
>
> =====================
> -----Original Message-----
> From: slug@nks.net [mailto:slug@nks.net] On Behalf Of SOTL
> Sent: Saturday, June 09, 2007 10:16 AM
> To: slug@nks.net
> Subject: Re: [SLUG] Real World Class 3D modeler for Linux
>
> If you can design tanks with it you can design anything with it.
> http://ftp.brlcad.org/VolumeIII-Principles_of_Effective_Modeling.pdf
> http://www.brlcad.org/reports/arl-tr-315/index.html
> http://www.brlcad.org/reports/arl-mr-103/index.html
> http://en.wikipedia.org/wiki/BRL-CAD
> http://brlcad.survice.com/mirror/BRLCAD/ftp.arl.army.mil/brlcad/preGPL/galle
> ry/index.html
> http://ftp.arl.mil/brlcad/preGPL/gallery/hst_caption.html
>
>
> I have looked extensively but there are 3 BRI-CAD web sites. Two I found but
> it is the third that will answer your questions about modeling. I can not
> find the site since the home site was changed or updated if you will.
>
> SOTL
>
> On Thursday 07 June 2007 19:27, Ken Elliott wrote:
> > >> Try this
> > >> http://www.brlcad.org/
> >
> > Too limited. It might be a great product for some, but for any
> > professional it would be far to limited.
> >
> > CSG modelers like BriCAD simply cannot model at the same level as a
> > good NURBS modeler, like Rhino. CSG modelers construct the model by
> > combining several simple geometric shapes. Modeling a ball in a CSG
> > modeler would be constructed of many triangles. Too few and the
> > surface would have flat spots like a diamond. Too may and the file
> > size gets extremely large. A CSG modeler would be suitable for a
> > house, since it's mostly a series of boxes (walls), but it is nearly
> > impossible to create an egg carton or modern car body. NURBS (when
> > properly done) give you the ability to control the model shape with
> > control handles. Rhino is like modeling clay, yet it's fast and the
> > file size is tiny. Comparing the two is like comparing a modern Linux
> > distro with Windows 1.0. To the casual user, they may look somewhat
> > alike, but under the hood they couldn't be more different.
> >
> > On Linux, tools like PTC's ProEngineer have capabilities far beyond
> > anything free or low cost. Rhino won't do everything ProE does, but
> > it can do some things that ProE can't. Rhino is used by some F1 teams
> > for modeling their aero parts. Nuff said.
> >
> > Ken Elliott
> >
> > =====================
> > -----Original Message-----
> > From: slug@nks.net [mailto:slug@nks.net] On Behalf Of SOTL
> > Sent: Friday, June 08, 2007 5:08 PM
> > To: slug@nks.net
> > Subject: Re: [SLUG] Real World Class 3D modeler for Linux
> >
> > On Thursday 07 June 2007 17:53, Ken Elliott wrote:
> > > No, it's not FOSS or Open Source, but Rhino is a fantastic
> > > world-class CAD package. The producer (Robert McNeel and
> > > Associates) seems to be probing to see if there is an interest in a
> > > Linux version. For designers like me, this type of tool is one of
> > > the last reasons I've had to keep a few Windows boxes around.
> > > McNeel has a Mac port in beta, so a Linux version might not be too hard.
> > >
> > > Product: http://www.rhino3d.com/
> > >
> > > Vote here:
> > > http://offbroadway.blogspot.com/2007/06/rhino-for-mac-os-x.html
> > >
> > > No, it's not free, but compared to the $4,000 to $10,000 price tag
> > > of most CAD packages, Rhino's $995 price is rather reasonable.
> > >
> > > Ken Elliott
> >
> > Try this
> >
> > http://www.brlcad.org/
> >
> > SOTL
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