matplotlib-users

[Matplotlib-users] matplotlib.delauney with periodic boundary conditions

[Matthew M. <mat...@gm...>]

I'm trying to get a delaunay triangulation of a set of points on the surface
of the torus. I'm using matplotlib.delaunay, but it seems to only give the
triangulation for a flat surface. Is there any way to tell it to take the
periodic boundary conditions into account, or alter the points I input such
that matplotlib.delaunay interprets them as being on the surface of the
torus.

Perhaps another choice of package might be better, but I know very little
Python. I'm really a Matlab man, and matplotlib.delaunay is very similar to
the equivalent function there. So if you know of an alternative, could you
point me to idiotproof example files?
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Re: [Matplotlib-users] matplotlib.delauney with periodic boundary conditions

[Robert K. <rob...@gm...>]

On 10/22/10 6:28 AM, Matthew Matic wrote:
>
> I'm trying to get a delaunay triangulation of a set of points on the surface
> of the torus. I'm using matplotlib.delaunay, but it seems to only give the
> triangulation for a flat surface. Is there any way to tell it to take the
> periodic boundary conditions into account, or alter the points I input such
> that matplotlib.delaunay interprets them as being on the surface of the
> torus.

No, there isn't.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco

Re: [Matplotlib-users] matplotlib.delauney with periodic boundary conditions

[Robert K. <rob...@gm...>]

On 10/22/10 6:28 AM, Matthew Matic wrote:
>
> I'm trying to get a delaunay triangulation of a set of points on the surface
> of the torus. I'm using matplotlib.delaunay, but it seems to only give the
> triangulation for a flat surface. Is there any way to tell it to take the
> periodic boundary conditions into account, or alter the points I input such
> that matplotlib.delaunay interprets them as being on the surface of the
> torus.

Having said that, assuming your points are reasonably dense, then you can simply 
repeat your points 9 (or 25) times in a tiled grid, then pull out the center. 
That's probably close enough. There's some bookkeeping left as an exercise for 
the reader, but it's nothing unreasonable.

-- 
Robert Kern

"I have come to believe that the whole world is an enigma, a harmless enigma
  that is made terrible by our own mad attempt to interpret it as though it had
  an underlying truth."
   -- Umberto Eco