I’m exploring the docofossor plugin (https://www.food4rhino.com/app/docofossor) which is used for terrain analysis. Unfortunately it only accepts xyz asc files in order to import a terrain. Given below is a screenshot of the example file.
Is there a way in Grasshopper to convert a mesh to xyz file?
dfCutFillInPath.gh (6.5 KB) example_DTM.xyz (248.6 KB)
Hi -
Volvox seems to be able to do that.
-wim
I did exactly as per your instructions.
I do get the xyz file, but docofossor doesn’t read it and gives error.
WEDNESDAY TESTING.XYZ (86.0 KB)
Grasshopper file is the same as the one in original post, therefore I didn’t attach it again.
Hi - I don’t use docofossor and don’t know what that error is about. You could try contacting Ilmar Hurkxkens directly - his eMail address is on the Food4Rhino page.
-wim
I believe the error is because the coordinates of each point are not comma delimited
How do I convert them to comma delimited?
From the documentation, that does not seem to be the case…
The Import XZY component imports a text file to a df list that has topographic data stored as a list of x, y, and z values separated by whitespace characters. Each point should start at a new line.
docofossor/DOCUMENTATION.md at master · dbt-ethz/docofossor · GitHub
That would be easy enough to test. Open the xyz file in Notepad and replace spaces with a comma.
-wim
This is also a simple way in grasshopper 
comma delimitation.gh (4.7 KB)
Doesn’t work. I copied the data in a notepad file, saved it as xyz and still getting error.
3RD_DEC_TEST FILE.XYZ (143.4 KB)
WIth mesh, comma delimitation.gh (177.0 KB)
Hello,
The error seems to be on the final line 2668 - maybe try deleting the blank line at the end and/or replacing ", " with "," (just a comma and no space)
Good luck !
Graham
Tried it, removed the space after commas and removed the last blank entry of 2669. Exactly the same error. Ditto. No change.
without spaces after commas_3RD_DEC_TEST FILE.XYZ (138.2 KB)
Hi @archz2,
Here’s a custom GHPython component of mine that writes a list of data strings to whatever file you specify. I’ve tested it with your file and it seems to work fine:
If you are using Rhino 5 and don’t have GHPython installed, you need to download it form food4rhino!
WIth mesh, comma delimitation 2.gh (167.1 KB)
I think the file has to be a regular uniform grid in x and y - is that the case for your mesh?
I’ve looked up the XYZ-format that I was previously unfamiliar with on wikipedia, and it seems like it should be structured like this:
<number of atoms>
comment line
<element> <X> <Y> <Z>
Tab separation instead of commas and it needs a header containing the maximum number of items.
I used your script to generate an xyz file. I have Rhino 6 and 7 installed.
In docofossor plugin you mean?
I’m getting the same error 2668.
3RD_DEC_TEST FILE.XYZ (143.4 KB)
No, I meant that I tested my GHPython component with your Grasshopper file.
Yes, as I mentioned in my previous comment, XYZ-files probably need to be formatted like this:
<number of atoms>
comment line
<element> <X> <Y> <Z>
I’ve quickly added another GHPython component that parses the XYZ-file information,
I don’t know if it works with docofossor, since I don’t have that add-on, however the new output looks promising:
WIth mesh, comma delimitation 3.gh (170.2 KB)
Hello again,
Yes I’m afraid it does need to be a regular grid - your grid is not regular. See the comments and questions on the docofossor page:
Thanks. This time is error is different.
How do I convert my mesh into a regular grid xyz file?
Sorry, I have no clue, but I guess it was worth a shot.
It was indeed. I’m grateful for your efforts. I think from having a 100% error file, now the error is reduced to just 1% that’s causing trouble. Just a gut feeling.
