Camera directions

[kavonszadkowski]

There are different possibilities of how to orient cameras. For instance, in most work on graphics and vision, the depth of the image is the (negative) Z component, whereas in MARS, it is currently the X component. Cameras in Blender follow the -Z convention, however currently SMURF assumes the camera to be oriented as its parent link.

I say we go with the usual convention and assume MARS does that, too.

[Amudtogal]

This is similar to the problem with obj exports (#139).

We can add a similar parameter to the export settings, based on the existence of camera sensors in the model...
Would this be useful or should we add a different settings panel for all kind of advanced specific usecase only settings?

[Amudtogal]

This appears not to be that huge of an issue at the moment. So we should reconsider it in 1.1.
If you need to export a camera differently, you can still just rotate the mesh and export like that.