Provide means to go from textured OBJ to textured and temporal CityGML

[jailln]

Florian creates .obj files with textures. How to convert them into textured CityGML and how to automatically add temporal information to them ?

• [ ] Identify the process (maybe .obj is not the right export format ?)
• [ ] Implement the process

[jailln]

Regarding the .obj to .citygml conversion (without texture for now):

• There is a process in 3DUSE allowing to convert obj files into cityGML files (without textures). It only works for buildings for now. In case of a building, vertical surfaces are converted to wall surfaces and other surfaces are converted to roof surfaces. Few modifications in the code should allow to export other type of objects such as generic city objects for example. Another way (quick and dirty) would be to use the export to building object but skip the wall/roof assignement and manually change the "bldg" references in the .gml output file. Note that this converter add an offset to the obj file (which should be set to 0 except if the obj was originally a citygml file converted to obj with a 3DUSE converter)

• We need to check if there is a tool (maybe here: https://github.com/tudelft3d) allowing to convert obj to citygml files.

[jailln]

Maybe this tool can help: https://github.com/lilleyse/OBJ2GLTF