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How to get informations from a mesh with BlueKenue to a txt file
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TOPIC: How to get informations from a mesh with BlueKenue to a txt file

How to get informations from a mesh with BlueKenue to a txt file 10 years 10 months ago #11669

  • special_20
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Dear all,

I would like to select some points in a mesh and save informations like coordinates and number node into a txt file that would look like :

X Y n°
1.3 3.14 5
5.2 2.7 8
3.4 3.4 15

Is it possible ? And if so how to do this ?

Thanks
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How to get informations from a mesh with BlueKenue to a txt file 10 years 10 months ago #11677

  • sebourban
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Hello,

You can write a small python script using the python tools we have developed -- something like the following should work:
#!/usr/bin/env python
import sys
sys.path.append( "c:\\opentelemac\\v6p3\\scripts\\python27\\" )
from parsers.parserSELAFIN import SELAFIN
from utils.files import putFileContent

slf = SELAFIN('input.slf')
out = ['X Y N']
for i in range(slf.NPOIN2):
   out.append(str(slf.MESHX[i])+' '+str(slf.MESHY[i])+' '+str(i))

putFileContent( 'outfile.xyn',out)

You have to put the correct path, and the correct file names. You can also improve this simple trial.

Hope this helps,
Sébastien.
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How to get informations from a mesh with BlueKenue to a txt file 10 years 10 months ago #11685

  • Serrer
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Hi Special_20,

As a response I'll say it depends on what you are trying to achieve.

In addition to the native t3s format, you can save a mesh to a
number of different ASCII file formats. (See File->SaveCopyAs"
(SMS,ADCIRC,TRIGRID,Tecplot,xyz)
Some of these formats include the node number.

Using "Tools->Extract Points" or "Tools->T3Mesh->Extract Subset"
you can extract nodes or a submesh that lie within a polygon.

Hope this helps... Martin
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #11732

  • harryyao
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Dear Serrer,

I also have a question, Can The Blue Kenue import the data directly from AutoCAD ? for examples, Import the river boundary conditions from AutoCAD.
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #11808

  • special_20
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I must say thank you Serrer for your answer, I applied it this day and I must say that this is exactly what I was looking for :woohoo:

Now, what I should have done by hand, node by node, in a week will just take me about a few hours. So thanks again :woohoo: :woohoo:
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #12112

  • ogr013
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Hi,
Thanks for the lines of code to read selafin files into python.

from runSELAFIN import *
slf = scanSELAFIN(infile).slf
z = slf.getVALUES(0)

I want to map some new data points onto a geometry file.
i = np.argwhere(z < -20)
z[ i ] = -20

How can I put the modified data 'z' back into the slf object? To then save as a new file

slf.putContent(outfile) ...?

Thanks,
Julian
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #11722

  • special_20
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Thank you Sebourban and Serrer for your answers.

Sebourban : I don't know how to code in Python but I must say that your solution looks interesting. It is written in your code : "for i in range(slf.NPOIN2)", this implies that each node is identified by a node number in a slf file ?
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #11726

  • sebourban
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Hello, that is correct.

In python MESHX[ i ] and MESHY[ i ] are the coordinates of node i
Same for the Fortran with different variable names (and brackets' style)

Do try python -- it is fun to learn and so efficient

Hope this help,
Sébastien.
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How to get informations from a mesh with BlueKenue to a txt file 10 years 9 months ago #11728

  • special_20
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I am supposed to learn Python soon at my lab. But I think I will not wait and learn by myself.
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How to get informations from a mesh with BlueKenue to a txt file 10 years 8 months ago #12224

  • sebourban
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Hello,

you can try something like this (assuming your variable is first of the list):
slf.fole.update({ 'hook': open('outputfile.slf','wb') })
   slf.appendHeaderSLF()
   # ~~> Time stepping
   for t in range(len(slf.tags['times'])):
      slf.appendCoreTimeSLF(t) # Time stamps
      vars = slf.getVALUES(t)
      vars[0][np.argwhere(vars[0] < -20)] = -20
      slf.appendCoreVarsSLF(vars)
   slf.fole['hook'].close()

Hope this helps,
Sébastien.
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