[cgma-dev] Continuing discussion of iGeom handling of RefVolume vs Body

[Paul Wilson]

Hello,

There has been some discussion in a pull request 
<https://bitbucket.org/fathomteam/cgm/pull-request/8/igeom-updates> that 
I thought would be better brought to the mailing list.

This was initially motivated by the realization that iGeom was 
inconsistent in returning a RefVolume vs a Body in different calls. 
Thus, two entity handles that referred to the same volume in space would 
not be detected as the same volume.

Faced with two choices - refer only to RefVolumes or refer only to 
Body's - we settled on referring only to refVolume's in the iGeom 
interface.  However, this breaks the ability to refer to a Body such as 
my be returned by uniting two volumes that are disjoint - which is part 
of the interface.

So.... perhaps we need to only deal with Body in the iGeom interface.  
Perhaps Patrick can offer some of the downsides to this approach?

Paul

-- 
-- ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ --
Paul Wilson ~ UW-Madison ~ 608-263-0807 ~ cal: http://bit.ly/pphw-cal
Professor, Engineering Physics. ~ http://cnerg.engr.wisc.edu
Faculty Director, Advanced Computing Infrastructure ~ http://aci.wisc.edu		

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