Error while performing calculations

[mahanthg]

Hello

I created a project based on instructions in https://github.com/Ifsttar/I-Simpa/wiki/Study-of-teaching-room

I simply added a sound source and a receiver and started performing calculations. However, it ends abruptly with the following result - Error:Failed to load icon from the file '"%1"' (error 2: the system cannot find the file specified.)

Could you please help me fix the issue. I am using Windows 8

Thanks, Mahanth

[Picaut]

Dear Mahanth, this error is just a warning, in fact, because the system cannot associate a file with a corresponding icon when producing the results in the corresponding path (for example I-Simpa produce XML files, but the system don't know how to associate a corresponding icon for the visualization of the file in the repository containing the results file). This is a known issue. It should not be a fatal error, and you should access to the results in the "Results" tab. Judicaël

[mahanthg]

Thanks for the quick response. The results tab takes me to the folder where results are stored. However, I do not know how to interpret those files. I am Interested in obtaining the results of impulse response and frequency response. Please let me know how to get them. A trace of ray propagation paths will be helpful too.

Thanks a lot, Mahanth

[Picaut]

The corresponding tutorial in the wiki is not complete (I need time!), so all information are not given.

If you want to see some results, all can be obtained by a right-click on a file (acoustics parameters calculation, animation...) or by double-click on a file to open data as a spreadsheet. It depends of the results file. For a trace of ray propagation paths, you first need to add "Particles (display)" in the SPPS parameter (configuration of the calculation). Then, after running, in the results folder "Particles", you right click on a 'particles' file to load an animation.

I will try to take time in next weeks to complete the tutorial on the wiki. If you read french, there is a full documentation (with tutorials) in the documentation folder within the I-Simpa installation folder.

Judicaël

[mahanthg]

OK, thanks a lot for the information. I have access to basic results now, will get back to you after analyzing it a bit

Thanks, Mahanth

[mahanthg]

Hi Judicaël

Regarding, the Particles in the SPPS parameter, I was not able to add that. Could you please explain how to add it.

In the Calculation Tab, when I right click on SPPS , I see only three options 1) Run Calculation 2) Liste de travail and 3) Copy . Neither do I see an option to add the particles nor I do I see any properties setting that can be changed. When I run the animation, I cant see the propagation paths, and there is no particle subfolder in the results folder. Any help regarding how to add the particles parameter is really helpful . For example, in the attached scene, I would love to see propagation rays bouncing off the walls and arriving at the receiver and a direct path between the source and the receiver. Please take a look at the attached picture for reference. Thanks a lot for the help

Thanks, Mahanth

[nicolas-f]

Hi,

You can unfold nodes and show properties by double clicking on elements.

regards,

[mahanthg]

Ah, thanks thats fine! I have access to particles (display) now

[mahanthg]

Hello,

I am attaching a screenshot of the propagation rays. I can see many rays originating from source and bouncing around. However wondering if is possible to filter rays by following criteria

1. Filter only the rays that hit the receiver. I would like to skip other rays shown in the view that do not hit the receiver
2. Is it possible to find intensities of all of these individual rays

Finally, wondering whether diffraction rays are included. If not, do you know how much error would be generated in modelling if we included diffraction

Thanks a lot for your support

Regards,

[mahanthg]

Hello,

Could someone please reply to my question

Thanks

[nicolas-f]

Hi,

Filter only the rays that hit the receiver. I would like to skip other rays shown in the view that do not hit the receiver There is no GUI option in order to filter particles path.

Is it possible to find intensities of all of these individual rays Yes, intensities are encoded into the particules.pbin file. You can open it using Libsimpa Python library.

wondering whether diffraction rays are included. If not, do you know how much error would be generated in modelling if we included diffraction Diffraction are not included in the simulation. I can't bring any more information as it is not my speciality, @Picaut ?