Trouble creating heatmap

grasshopper ladybug
1

Hi everyone,

I am very new to grasshopper and ladybug. I followed a tutorial on youtube by Philipp Galvan Design: https://www.youtube.com/watch?v=Bmym1BQViuA

However, I can’t get the heatmap right. It says: 1. Solution exception:need more than 2 values to unpack.

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Can anyone please help me?
Thank you.

2

Bumping this, I am also getting the same error with my heatmap component. Here is a full read out of the errors. I am trying to make a heat map to compare a simplified surface to a full detail surface. Here is a screen shot of my script and the full error read out.

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Runtime error (ValueErrorException): need more than 2 values to unpack

Traceback:
line 29, in , “C:\Users\cameron.behning\ladybug_tools\python\Lib\site-packages\ladybug_radiance\intersection.py”
line 17, in , “C:\Users\cameron.behning\ladybug_tools\python\Lib\site-packages\ladybug_radiance\study\directsun.py”
line 35, in , “C:\Users\cameron.behning\ladybug_tools\python\Lib\site-packages\ladybug_display_extend_ladybug.py”
line 2, in , “C:\Users\cameron.behning\ladybug_tools\python\Lib\site-packages\ladybug_display_init_.py”
line 57, in script

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3

Looking around, it appears the problems came from this edit of the intersection.py file on November 14, 2023.
fix(intersection): Use radiance meshes in intersection calculation · ladybug-tools/ladybug-radiance@a846a22 (github.com)

the Third variable OBJ@MESH_EXE was added without a matching third value (presumable of “None”)added to the other side of the equals sign, resulting in the “need more than 2 values to unpack” error.
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I edited by copy of intersection.py to have the third “None” value and can confirm that heatmap now works as anticipated. I don’t know how to make a pull/merge request else I would make that right now. @chris I see you made these edits and are active on the forums. Maybe you can issue an update?

@Iris991 you can make the change yourself as well.

  1. Navigate to “C:\Users\ YOUR USER NAME \ladybug_tools\python\Lib\site-packages\ladybug_radiance” and open the file intersection.py either in notepad or a formal code editor.
  2. Edit line 29, adding “, None” to the end of the line. Make sure to include the extra comma. (see picture for reference)
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    image626×560 19 KB
  3. Save and close intersection.py
  4. Close grasshopper and Rhino, then re open. Heatmap should now work.
4

It works!!! Thank you so much for your clear instructions.

5

Hi @cbehn ,

I’m really sorry for the late response here. I must have lost track of this post in the holiday shuffle.

Thank you so much for finding, reporting, and offering a fix for this bug. I think I must have never noticed it because this only affects machines that do not have an installation of Radiance. I just pushed a permanent fix here:

… which should be available with the LB Versioner shortly. Thanks again!

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