Add support for dynamic NDOF orbit center calculation.
- When "Auto" NDOF preference is enabled:
All visible objects in the viewport are used to calculate a
bounding box center, if the bounds are outside the view or the center
is behind the viewport, use a Z-Buffer test to calculate the depth in
the middle of the region.
- When "Use Selected Items" NDOF preferences is enabled,
calculating the bounds from the selection.
- An option to show the orbit center as a guide has also been added.
Ref !129594
Co-authored-by: Kamil Galik <kgalik@3dconnexion.com>
1a14d69498