I am encounterd the CMake error with "Qt53DExtras".

[camelxpnu]

Hello. I would like to visualize the rbdl lib works with your tool kit.
As far as I followed your instruction, I am encountered an error after cloning source code.

Could not find a package configuration file provided by "Qt53DExtras" with
  any of the following names:

    Qt53DExtrasConfig.cmake
    qt53dextras-config.cmake```

Could you give me some instruction to resolve this?

[ju6ge]

seems like you are missing qt3d stuff … but the solution heavily depends on how you installed rbdl an what system you are on. So I can not give you instructions to resolve this. If you want to have it easy just use the AppImage if you are on linux ;) … or the installers für mac or windows. There is no need to compile it yourself.