https://bugs.freedesktop.org/show_bug.cgi?id=81181

          Priority: medium
            Bug ID: 81181
          Assignee: libreoffice-bugs@lists.freedesktop.org
           Summary: Poor gltf default camera position & centering ...
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: michael.me...@collabora.com
          Hardware: Other
            Status: UNCONFIRMED
           Version: 4.3.0.2 rc
         Component: graphics stack
           Product: LibreOffice

I know that it is hard to calculate the default camera position (when it is not
defined in gltf), but it would be good to find a better way to do that.

For example wine model is very far from the camera in orbit mode (see
wine_in_orbit_mode.png) and additionally that camera movement constrain which
was added recently does not allow us to move camera closer to the model. It
moves a bit closer but after that it stops.

Also - Model center position is not calculated right.
In orbit mode rotation is done around the model center position but it seems
it's not calculated in the right way. There are more models where rotation is
done around the corner of the model and not around it's center. (see these
models: jeep, monster, phoenix, wine)

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