Radu,
Thank you for the response!
After making these changes, I realized that the issue relied with
chrono.SetDataPath, as commenting this out immediately removed the access
violations albeit without generating any of the mesh terrain. I think the
script had a data path already set, however using that method caused some
sort of access violation which generated issues in trying to access vehicle
information earlier on in the initialization process.
I think the issue is in my JSON, then? When I loaded the sample
RigidHeighMap JSON instead, it was able to run the simulation at ease and
with everything loaded correctly, however I think this issue is seperate
from what I've been encountering with actually getting the simulation to
work.
Thanks again!
-Jack
On Monday, August 5, 2024 at 7:51:35 AM UTC-4 Radu Serban wrote:
> Jack,
>
>
>
> You misunderstand the meaning of the Chrono and Chrono::Vehicle data
> paths. What you are supposed to provide through the functions
> chrono.SetChronoDataPath and veh.SetDataPath are the locations of *
> *directories** containing data file. With what you have, the terrain
> file is probably found fine, but the incorrect setting for the vehicle data
> path may mess up something else (difficult to tell without seeing your
> code, but one possibility is if you are using some visualization mesh for
> the HMMWV vehicle).
>
>
>
> Try something like this:
>
>
> chrono.SetChronoDataPath('Users/wagne/anaconda3/envs/pychrono/Library/data/)
>
> veh. SetDataPath(chrono.GetChronoDataPath() + ‘vehicle/')
>
> …
>
> terrain = veh.RigidTerrain(hmmwv.GetSystem(),
> veh.GetDataFile(‘terrain/WaveFrontTest.json’)
>
> …
>
>
>
> (Of course, this also assumes that your JSON terrain specification file is
> correct)
>
>
>
> --Radu
>
>
>
> *From:* [email protected] <[email protected]> *On
> Behalf Of *Jack Wagner
> *Sent:* Sunday, August 4, 2024 10:35 PM
> *To:* ProjectChrono <[email protected]>
> *Subject:* [chrono] Re: Issues With Importing JSON for RigidTerrain
> (PyChrono)
>
>
>
> Additionally, I am using the win-64_pychrono-9.0.0-py39_4852 package
> downloaded through Anaconda.
>
> On Sunday, August 4, 2024 at 2:53:11 PM UTC-4 Jack Wagner wrote:
>
> I have been trying to import the example RigidTerrain JSON with the
> example Wavefront OBJ to examine vehicle behavior on variable landforms and
> learn more about the wavefront terrain structure, however just trying to
> implement it into the simulation is causing me issues. I have the following
> code block to signify the directory for the JSON file:
>
>
> chrono.SetChronoDataPath('Users/wagne/anaconda3/envs/pychrono/Library/data/vehicle/terrain/')
> veh.SetDataPath(chrono.GetChronoDataPath() + 'WaveFrontTest.json')
> terrain_file = veh.GetDataPath()
>
>
>
> Then simply implement and initialize the terrain with the terrain file:
>
> terrain = veh.RigidTerrain(hmmwv.GetSystem(), terrain_file)
> terrain.Initialize()
>
>
>
> However, every time I try to run this, I receive a fatal access violation
> and am unsure of what i am doing wrong. I keep thinking it's a simple
> syntax issue, however everything I try moving around (making terrain_file
> equal to the exact data path, switching around using Set/GetDataPath, etc.)
> has been ineffective.
>
>
>
> Assistance would be very helpful. Below is a copy of my terminal's output
> and the JSON file I am using for reference, although the JSON is nearly
> identical to the example specified in the PyChrono documentation.
>
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