Hi there,

Im guessing that images have the orientation of their axes specified in the 
header, which can be different from the global x,y,z axes. Surfaces and points 
dont. So, for example, an mitk::Surface contains a vtkPolyData, and all 
coordinates are in x,y,z coordinates. So, there is no other coordinate axes to 
chose from. Historically, mitk::PointSet used to just contain x,y,z coordinates 
but a while back, around 2015 I think, the file format itself was updated to 
include the orientation.

M


> On 13 Jun 2018, at 14:45, Daniel Maleike <c...@maleike.de> wrote:
> 
> Hi,
> 
> I just noticed that the "Reinit" of Data Manager implements alignment to 
> object axes only in the special case of a single selected _image_. I 
> understand that for multiple selections a world-axes aligned bounding box is 
> more what we expect.
> However, I have a doubt why we handle images different from meshes or point 
> clouds. If those objects have their proper coordinate system, why shouldn't 
> we align to this system if the user selects explicitly one of those objects?
> 
> Can anybody explain / remember the reason for this choice?
> 
> Thanks, best regards,
> Daniel
> 
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