Anuga-user Digest, Vol 42, Issue 3

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Feb 14, 2012, 5:10:41 AM2/14/12

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Today's Topics:

1. Mesh file (Mathieu Lap?tre)
2. Re: Mesh file (Stephen Roberts)
3. Adding an Interior Hole to geometry (marcor...@libero.it)
4. Re: Adding an Interior Hole to geometry (Stephen Roberts)

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Message: 1
Date: Fri, 10 Feb 2012 20:03:39 +0100
From: Mathieu Lap?tre <lapotre...@hotmail.com>
Subject: [Anuga-user] Mesh file
To: <anuga...@lists.sourceforge.net>
Message-ID: <DUB114-W63E4B5E1D...@phx.gbl>
Content-Type: text/plain; charset="iso-8859-1"

Hello,
Is there a simple way to visualize the mesh from the .msh file instead of the .sww file on Windows?Cheers,
Mathieu Lapotre
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Message: 2
Date: Mon, 13 Feb 2012 09:32:42 +1100
From: Stephen Roberts <stephen...@anu.edu.au>
Subject: Re: [Anuga-user] Mesh file
To: anuga...@lists.sourceforge.net
Message-ID: <4F383E0A...@anu.edu.au>
Content-Type: text/plain; charset="iso-8859-1"

Hi Mathieu,

There is a primitive mesh viewer available in the anuga distribution.

It is in the anuga/pmesh directory.

From that directory run

python graphical_mesh_generator.py

As the name implies, you can create a msh file, but you can also open a
msh file.

Doesn't work well with large meshes though.

Cheers
Steve

On 11/02/12 06:03, Mathieu Lap?tre wrote:
> Hello,
>
> Is there a simple way to visualize the mesh from the .msh file instead
> of the .sww file on Windows?
> Cheers,
>
> Mathieu Lapotre
>
>
> ------------------------------------------------------------------------------
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> also focuses on allowing computing to be delivered as a service.
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Message: 3
Date: Tue, 14 Feb 2012 09:28:11 +0100
From: "marcor...@libero.it" <marcor...@libero.it>
Subject: [Anuga-user] Adding an Interior Hole to geometry
To: anuga...@lists.sourceforge.net
Message-ID: <4F3A1B1B...@libero.it>
Content-Type: text/plain; charset="iso-8859-1"

Hi All,

I am trying to simulate the presence of a building within my inundation
area. I therefore tried to insert an internal hole, like this:

U = [[686072,923091], [686072,923084], [686082,923084], [686082,923091]]
# building perimeter
domain = anuga.create_domain_from_regions(project.bounding_polygon,
boundary_tags={'nord': [0], 'est': [1], 'sud': [2], 'ovest': [3]},
maximum_triangle_area=project.default_res,
mesh_filename=project.meshname, interior_holes=U,
use_cache=True,
verbose=True)

Unfortunately I get the following error message:

Traceback (most recent call last):
File "ammonite.py", line 47, in <module>
verbose=True)
File "/usr/lib/python2.6/dist-packages/anuga/__init__.py", line 254,
in create_domain_from_regions
compression=False)
File "/usr/lib/python2.6/dist-packages/anuga/caching/caching.py",
line 376, in cache
T = my_F(*args, **kwargs) # Built-in 'apply' deprecated in Py3K
File "/usr/lib/python2.6/dist-packages/anuga/__init__.py", line 292,
in _create_domain_from_regions
verbose=verbose)
File
"/usr/lib/python2.6/dist-packages/anuga/pmesh/mesh_interface.py", line
121, in create_mesh_from_regions
args, kwargs)
File
"/usr/lib/python2.6/dist-packages/anuga/pmesh/mesh_interface.py", line
241, in _create_mesh_from_regions
raise PolygonError, msg
PolygonError: Interior polygon [686072, 923091] is outside bounding
polygon: [[ 686007.82 923006.11]
[ 686145.11 923006.11]
[ 686145.11 923145.11]
[ 686003.91 923145.6 ]]

The building perimeter is actually inside, not outside, the bounding
polygon, but Anuga seems to think the opposite is true. Can you suggest
the reason of the error?
Thank you in advance!

Regards,
Marco

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Message: 4
Date: Tue, 14 Feb 2012 21:10:22 +1100
From: Stephen Roberts <stephen...@anu.edu.au>
Subject: Re: [Anuga-user] Adding an Interior Hole to geometry
To: "marcor...@libero.it" <marcor...@libero.it>,
anuga...@lists.sourceforge.net
Message-ID: <4F3A330E...@anu.edu.au>
Content-Type: text/plain; charset="iso-8859-1"

Hi Marco,

Sure seems that [686072, 923091] is inside the bounding polygon: [[
686007.82 923006.11]
[ 686145.11 923006.11]
[ 686145.11 923145.11]
[ 686003.91 923145.6 ]]

Could you provide me with your scripts. I would be interested to see
where the problem arises.

By the way, the interior_holes should be a list of polygons, so you
should pass the hole via

interior_holes=[U]

Ie make U into a list containing U, ie [U]

Cheers
Steve

On 14/02/2012 7:28 PM, marcor...@libero.it wrote:
>
> Hi All,
>
> I am trying to simulate the presence of a building within my
> inundation area. I therefore tried to insert an internal hole, like this:
>
> U = [[686072,923091], [686072,923084], [686082,923084],
> [686082,923091]] # building perimeter
> domain = anuga.create_domain_from_regions(project.bounding_polygon,
> boundary_tags={'nord': [0], 'est': [1], 'sud': [2], 'ovest': [3]},
> maximum_triangle_area=project.default_res,
> mesh_filename=project.meshname, interior_holes=U,
> use_cache=True,
> verbose=True)
>
> Unfortunately I get the following error message:
>
> Traceback (most recent call last):
> File "ammonite.py", line 47, in <module>
> verbose=True)
> File "/usr/lib/python2.6/dist-packages/anuga/__init__.py", line 254,
> in create_domain_from_regions
> compression=False)
> File "/usr/lib/python2.6/dist-packages/anuga/caching/caching.py",
> line 376, in cache
> T = my_F(*args, **kwargs) # Built-in 'apply' deprecated in Py3K
> File "/usr/lib/python2.6/dist-packages/anuga/__init__.py", line 292,
> in _create_domain_from_regions
> verbose=verbose)
> File
> "/usr/lib/python2.6/dist-packages/anuga/pmesh/mesh_interface.py", line
> 121, in create_mesh_from_regions
> args, kwargs)
> File
> "/usr/lib/python2.6/dist-packages/anuga/pmesh/mesh_interface.py", line
> 241, in _create_mesh_from_regions
> raise PolygonError, msg
> PolygonError: Interior polygon [686072, 923091] is outside bounding
> polygon: [[ 686007.82 923006.11]
> [ 686145.11 923006.11]
> [ 686145.11 923145.11]
> [ 686003.91 923145.6 ]]
>
> The building perimeter is actually inside, not outside, the bounding
> polygon, but Anuga seems to think the opposite is true. Can you
> suggest the reason of the error?
> Thank you in advance!
>
> Regards,
> Marco
>
>
>
> ------------------------------------------------------------------------------
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is just $99.99! Visual Studio, SharePoint, SQL - plus HTML5, CSS3, MVC3,
Metro Style Apps, more. Free future releases when you subscribe now!
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