Daylight simulations using Python

omarhamed · March 17, 2022, 5:30pm

Dear All,

I am working on a project to automate daylight simulations. I decided to use Ladybug tools as they are very powerful and relatively easy to use. I have learned how to perform daylight simulations using Grasshopper’s attached sample files, and by doing some training for different scenarios.

However, in my project, I am trying to conduct a “point-in-time-grid” simulation, but in all of my simulation attempts, I get 0 results. This can also happen when i try to conduct “daylight-factor” simulations. I do get results when I perform “annual-daylight” simulations with also some warnings.

I get error messages as follows:

"
*b"2022-03-17 17:16:23 INFO: Started running CreateRadFolder...\r\n2022-03-17 17:16:23 INFO: Started running GenerateSky...\r\n2022-03-17 17:16:24 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_folder\\folder.py:615: UserWarning: Sensors_from_author sensor grid has no light-path. It will not be included in three or five phase studies.\r\n2022-03-17 17:16:24 INFO: 'or five phase studies.' % grid['name']\r\n2022-03-17 17:16:24 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_folder\\folder.py:615: UserWarning: s_grid sensor grid has no light-path. It will not be included in three or five phase studies.\r\n2022-03-17 17:16:24 INFO: 'or five phase studies.' % grid['name']\r\n2022-03-17 17:16:24 INFO: C:\\Users\\omar_\\AppData\\Local\\Temp\\tmpekxtj7uk\r\n2022-03-17 17:16:24 INFO: ...finished running CreateRadFolder in 0:00:01\r\n2022-03-17 17:16:24 INFO: ...finished running GenerateSky in 0:00:01\r\n2022-03-17 17:16:25 INFO: Started running SplitGridFolder...\r\n2022-03-17 17:16:25 INFO: Started running AdjustSky...\r\n2022-03-17 17:16:26 INFO: Distributed 1000 sensors among 5 grids with 200 sensors each.\r\n2022-03-17 17:16:26 INFO: ...finished running SplitGridFolder in 0:00:01\r\n2022-03-17 17:16:26 INFO: ...finished running AdjustSky in 0:00:01\r\n2022-03-17 17:16:27 INFO: Started running CreateOctree...\r\n2022-03-17 17:16:28 INFO: ...finished running CreateOctree in 0:00:01\r\n2022-03-17 17:16:29 INFO: Started running PointInTimeGridRayTracingLoop...\r\n2022-03-17 17:16:29 INFO: Started running PointInTimeGridRayTracingLoop...\r\n2022-03-17 17:16:30 INFO: Started running PointInTimeGridRayTracingLoop...\r\n2022-03-17 17:16:30 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_command\\rcalc.py:98: UserWarning: rcalc: no inputs.\r\n2022-03-17 17:16:30 INFO: warnings.warn('rcalc: no inputs.')\r\n2022-03-17 17:16:30 INFO: rtrace: warning - no light sources found\r\n2022-03-17 17:16:30 INFO: Started running PointInTimeGridRayTracingLoop...\r\n2022-03-17 17:16:30 INFO: ...finished running PointInTimeGridRayTracingLoop in 0:00:01\r\n2022-03-17 17:16:31 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_command\\rcalc.py:98: UserWarning: rcalc: no inputs.\r\n2022-03-17 17:16:31 INFO: warnings.warn('rcalc: no inputs.')\r\n2022-03-17 17:16:31 INFO: rtrace: warning - no light sources found\r\n2022-03-17 17:16:31 INFO: Started running PointInTimeGridRayTracingLoop...\r\n2022-03-17 17:16:31 INFO: ...finished running PointInTimeGridRayTracingLoop in 0:00:01\r\n2022-03-17 17:16:31 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_command\\rcalc.py:98: UserWarning: rcalc: no inputs.\r\n2022-03-17 17:16:31 INFO: warnings.warn('rcalc: no inputs.')\r\n2022-03-17 17:16:31 INFO: rtrace: warning - no light sources found\r\n2022-03-17 17:16:31 INFO: ...finished running PointInTimeGridRayTracingLoop in 0:00:01\r\n2022-03-17 17:16:31 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_command\\rcalc.py:98: UserWarning: rcalc: no inputs.\r\n2022-03-17 17:16:31 INFO: warnings.warn('rcalc: no inputs.')\r\n2022-03-17 17:16:31 INFO: rtrace: warning - no light sources found\r\n2022-03-17 17:16:32 INFO: ...finished running PointInTimeGridRayTracingLoop in 0:00:01\r\n2022-03-17 17:16:32 INFO: c:\\users\\omar_\\ladybug_tools\\python\\lib\\site-packages\\honeybee_radiance_command\\rcalc.py:98: UserWarning: rcalc: no inputs.\r\n2022-03-17 17:16:32 INFO: warnings.warn('rcalc: no inputs.')\r\n2022-03-17 17:16:32 INFO: rtrace: warning - no light sources found\r\n2022-03-17 17:16:32 INFO: ...finished running PointInTimeGridRayTracingLoop in 0:00:01\r\n2022-03-17 17:16:33 INFO: Started running RestructureResults...\r\n2022-03-17 17:16:34 INFO: ...finished running RestructureResults in 0:00:01\r\n"*
b’’
"

any suggestions, please?

mostapha · March 18, 2022, 11:24pm

Hi @omarhamed,

You can ignore these warnings as they are not errors. To be able to help you with your script you need to share a sample code. Otherwise, it’s almost impossible to say what is going on.

omarhamed · March 21, 2022, 10:14am

Dear @mostapha,

Thank you for your reply.
kindly find the attached file below. I use a simple Shoebox-gbXML model, which is attached below.

Daylight Simulations_Mostapha.ipynb (56.6 KB)

Project1.xml (59.1 KB)

kind regards.

omarhamed · March 30, 2022, 2:00pm

Dear @mostapha,

I have also tested the point-in-time-view recipe, and in best scenarios, the output hdr image looks like this:

I think I do have some problems with the materials/modifiers. I have defined and assigned Modifiers to the model, but the output in any recipe did not change.

Could you help me identify what did I miss?

I am attaching the updated script files below.

Daylight Simulations.ipynb (127.2 KB)

Project21.xml (86.7 KB)

Best Regards.

omarhamed · April 15, 2022, 10:16am

Hello, Ladybug community,

Could anyone help in resolving this issue described above?

Best regards,
Omar

omarhamed · June 23, 2022, 11:18am

Dear All,

Thank you for your support. I have reviewed the script again and found that I misspelt one argument that led to placing the values of all inputs to “0”.

Now everything works just fine.

All the best.