Assertion Error after adding static object and recompute navmesh from Viewer.py

[EvaLiiiiii]

So I'm leveraging this tutorial for adding object "Clutter Generation Script" and the viewer.py example. I basically followed what's in the tutorial for adding object and then try to use the navmesh_config_and_recompute() provided in viewer.py so the object can become obstacles in the navmesh but it's keep failing on an assertion error
Does anyone have any insights on what this function does? or where the error may come from? After adding the object and setting self.navmesh_settings.include_static_objects = True, when I call the sim.recompute_navmesh, this error shows up.. Thanks!

[aclegg3]

@EvaLiiiiii so strange. :thinking: My guess would be some edge case related to the object asset mesh import. That assertion happens when the ResourceManager::getMeshMetaData function cannot find a meshMetaData entry for the object. Mesh data is queried to join all meshes in the scene before constructing the navmesh.

If you can provide the object asset I could test it locally and attempt to debug. If not, you could try passing the mesh asset through a converter to another format. That may clean-up issues or bypass any importer bug. Habitat importers prefer glTF.

Also, what version are you on? I see a conda build here, so it could be that if you are not on nightly the bug is stale and resolved elsewhere upstream.

[EvaLiiiiii]

Hi @aclegg3 , Thanks for quick response! I'm working on the "stable" version. I'm testing with sphere object in Adrian.glb from Gibson. This is what I did. I've also changed "sample_object_state" function to be sampling near a point instead of complete random sample. The spheres seem to appear correctly. But when I press shift+ n to recompute the navmesh I get that error..

[EvaLiiiiii]

Hi @aclegg3 I think the problem is with the sphere object. After I changed it to the donut it worked!

[aclegg3]

Yeah, must be an asset issue with the sphere. Glad you have a workaround and thanks for the report. When we get some bandwidth we can dig into why this is crashing.