Create adjunct helper libraries

[GoogleCodeExporter]

This issue is, at the moment, vague, but should be used as a meta-issue to 
track sub-tasks specific to the goal of providing some useful functionality 
that doesn't belong in the core libraries of Alembic (that is, stuff that is 
nice to have but shouldn't go in Abc or AbcGeom).  Things that should go in 
these libraries:

 - geometric interpolators for types in AbcGeom

 - generic interpolators for data at the Abc level

 - functions for determining visibility

 - functions for determining bounding boxes

Original issue reported on code.google.com by ard...@gmail.com on 7 Apr 2011 at 10:42

[GoogleCodeExporter]

Visibility added, and ready for code review as changeset 
http://code.google.com/r/bleair-helper/source/detail?r=1c884048d57588c00d9762b40
5546d88e3395113

Original comment by cookingw...@gmail.com on 6 Jul 2011 at 12:42

[GoogleCodeExporter]

Helper lib functions – top object can carry a bounds, then update maya writer 
(currently using own means to do this?)
Helper lib functions and kOnstatns – Archive writer can provide things : 
Alembic library version as string, application name , writer-version as string, 
date of write, optional user description, maya writer, zeno writer, AbcEcho, 
AbcEcho to pritn this info
Helper lib functions - as plugins load, report the compiled-in library and 
reader/writer versions of the plugins (requested by users here).
Helper lib – interpolators spline interp(then, have RiProcedural always use 
this, or maybe only our with inhosue Riprocedural?, hope to talk to Alex about 
zeno's interp code and then clear for use in lib

Original comment by cookingw...@gmail.com on 6 Jul 2011 at 3:09

[GoogleCodeExporter]

Interpolators - the one that has the most talk internally is the desire for the 
renderman procedural to make use of our current internal spline interpolating 
to provide smooth/curved motion. Have to talk with RnD and Alex S for details 
about copying, exporting, and scrubbing this code.

Original comment by cookingw...@gmail.com on 6 Jul 2011 at 3:14

[GoogleCodeExporter]

Closing as this has now been broken into separate tickets

Original comment by ble...@gmail.com on 8 Jul 2011 at 2:06

• Changed state: Resolved