I tried loading OFF files into SOFA using MeshVTKLoader but it did not work and I am not sure why, since the documentation of SOFA says it is able to do load that format using the VTK loader SOFA Documentation | Topology. Is there a way I can load OFF files into SOFA?
For the *.off format, you shall use the MeshOffLoader. Even if the off format is not widely used in the community, it should work for what you want to do.
For *.vtk meshes, use the MeshVTKLoader instead.