Tessellation Warning in Road Geometry with OSM Importer in Webots 2025a

[lola831]

When importing an OSM file with the Webots OSM importer and generating a world file, I receive the following warning when opening the generated world in Webots 2025a:

WARNING: Road "Allston Way(2)" > DEF RIGHT_BORDER Solid > Shape > DEF RIGHT_BORDER_GEOMETRY IndexedFaceSet: Tessellation Error: the contour of a face must not self-intersect.
The warning indicates that the road's right border geometry is self-intersecting, which appears to be a problem with the geometry generated by the OSM importer. Could you please advise if this is a known issue or suggest any workarounds/fixes?

Steps to Reproduce

1. Export OSM Map:
   • In OpenStreetMap, search for "Downtown Berkeley, CA".
   • In the search results, click on "Train Station Building" and then click Export to download the OSM file.
2. Run the OSM Importer:
   python importer.py --input=/path/to/myMap.osm \ --output=/path/to/myMap.wbt \ --no-forests --no-areas --no-parkings --no-trees --no-barriers --no-rivers --no-buildings --no-intersection-road-lines
3. Add this to the generated .wbt file
   EXTERNPROTO "https://raw.githubusercontent.com/cyberbotics/webots/R2025a/projects/objects/traffic/protos/PedestrianCrossing.proto"
4. Open in Webots:
   Open the generated .wbt file in Webots 2025a. Upon loading the world, you will see the warning regarding tessellation errors for road geometry.

System

• Operating System: Ubuntu 22.04 LTS
• Graphics Card: NVIDIA GeForce RTX 2080