Re: [matplotlib-devel] RE: Marching Squares Algorithm

I'd suggest seeing how VTK handles this.  I believe they have a patented
and a non-patented contour filter (vtkContourFilter and
vtkMarchingContourFilter).  The VTK package has a python interface.  The
goals page mentions on embedding VTK for future 3d functionality.  Could
VTK be embedded to leverage some of the other good work they've done?

Greg


On Tue, 2004-10-26 at 21:07, gary ruben wrote:
> Rather than drawing the conclusion that Carl can't read English or that he
> thinks we're going to start a fundraiser to raise the $10000, I think we
> can guess that marching squares is probably NOT covered by the patent, but
> that seeing a big dollar number and his title should scare us off testing
> the patent. Presumably there are alternatives to marching squares and I'd
> pursue them, unless you feel like poking Carl with another stick :-)
> 
> Gary R
> 
> *********** REPLY SEPARATOR  ***********
> 
> On 26/10/2004 at 12:59 Horton, Carl (GE Healthcare) wrote:
> 
> > Curtis: attached is a copy of the license agreement required for use of
> > the Marching Cubes/VTK algorithms and related software.  Once this
> > agreement has been executed and GE has received the requisite payments,
> > your license will be automatic.  Thanks.
> > 
> > 			
> > 
> > 
> > > Carl B. Horton
> > > GE Healthcare
> > > Chief IP Counsel
> > > 
> > > P:  262 513-4022
> > > F:  414 918-1641
> > > C:  262 385-7315
> > > D:  *320-4022 
> > > E:  Car...@me...
> > www.gehealthcare.com
> > 
> > -----Original Message-----
> > From: Curtis Cooper [mailto:cu...@hi...]
> > Sent: Friday, October 01, 2004 2:42 PM
> > To: Horton, Carl (GE Healthcare)
> > Cc: Matplotlib Developers
> > Subject: Marching Squares Algorithm
> > 
> > 
> > Dear Mr. Horton:
> > 
> > I am investigating options for creating 2D contour plots for the freely
> > distributable Matplotlib package (http://matplotlib.sourceforge.net/).
> > The Matplotlib license requires all the software to be free for
> > noncommercial and commercial distribution.
> > 
> > I had the idea to try to implement marching squares for this package.  We
> > know the marching cubes algorithm is patented, but what about the 2D
> > marching squares?  Can my implementation be used in this freely
> > distributed package without obtaining a license grant?
> > 
> > Thanks,
> > Curtis
> 
> ------------------------------------
> Gary Ruben     gr...@bi...
> <http://users.bigpond.net.au/gazzar>
> 
> 
> 
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Greg Whittier <gr...@th...>