ROI model 3D proposal evolution

[jburel]

This ticket will become the work to integrate the changes coming from the scijava work.
Full details of the proposed model can be found at:

​http://www.scijava.org/roi-model/

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A few semi-random comments I can share:

Wouldn't a few well chosen 3D primitive be useful as well? Like, sphere/ellipsoid, tube (=line with a 3D width)... And I am guessing input/output of VertexArray into standard format for viewing or processing (CGAL for computational geometry comes to mind, openGL stuff as well I guess) would be useful too, although that may be more for scripts/outside clients...

What about shapes intrinsically in 4D or even 5D? It might be a pain to deal with but one can think of cases where it may come in handy (tracking of stuff merging/splitting for example, or maybe sometime having one track=one shape could be useful; for channel: FRET pairs and photo-switchable protein, maybe?).

The other point is hierarchical roi: would it be possible to have nested roi (rois having some kind of RoiRoisSeq field for example)? it would allow for intra-cellular localisation in particular, but most likely other uses.

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• Review existing model and add previous proposed changes
• Update ​http://www.ome-xml.org/wiki/ROI/ProposalSeptember2010 to reflect changes
• Thread: ​http://lists.openmicroscopy.org.uk/pipermail/ome-devel/2011-May/001970.html