OSX with Qt3D 5.12.2 and QML, SceneLoader: Found no suitable importer plugin for 3ds obj

Question

I installed the most recent version of Qt5 - 5.12.2 for macOS and tried to create an application with SceneLoader object for loading my scenes. It does not work no matter what format I pass to it, I always have this error:

Found no suitable importer plugin for

I also can't find any examples in my /Users/user/Qt/Examples/Qt-5.12.2/qt3d (it is where I have Qt installed) regarding assimp but according to the documentation it must be there.

It also worth mentioning, that even though SceneLoader does not open anything (and *.obj as well), I am able to open them using Mesh object and then render them myself.

What have I done wrong? Do I need to install anything else in order to make it work? I tried to find in the components anything related to 3d or assimp and everything was ticked there, however, I was not able to find examples.

Crosspost on qt forums Crosspost on bugreports.qt.io

Answer 1

As of this writing, the above error seems to be a known bug that has been reported but not resolved yet. https://bugreports.qt.io/browse/QTBUG-89045

The libassimpsceneimport.so library file seems to be missing, which helps with loading various 3D file formats.

There's a hacky workaround to avoid the "found no suitable..." error. Using Qt Maintenance, install Qt 5.15.1. Next, copy the Qt->5.15.1->gcc_64->plugins->sceneparsers->libassimpsceneimport.so file to the corresponding 'sceneparsers' folder in the Qt 5.15.2 installation directory.