Collection, view, attributeDef, attribute all itemDefs and items now can be serialized
and deserialized via json.
TBD: More test cases should be added to test the serialization process.

We never built with it and it has different semantics for invaliding
iterators which could cause issues if anyone ever decided to use it.

The Python bindings are now always provided by it.

Using boost::dll, this commit updates PythonInterpreter's logic to
attempt to find the smtk module by keying off the location of the
smtkCore library. Methods have been added to facilitate adding to the
embedded interpreter's PYTHONPATH for additional modules. Also, python
operator logic has been updated to safely allow for the possibility of
a module to not be found. This update requires boost 1.64.0 or newer.

T.J. Corona authored 7 years ago and Ben Boeckel committed 7 years ago

(cherry picked from commit f0f05a89)

Now PointsBuilder's terrainExtraction ability is an operator in ModelBuilder.
It would hide the input aux_geom and load the result into ModelBuilder.

This MR introduces new SMTK optional dependencies as VXL and rtvl which
terrain extraction operator depends on. Some CMB classes are copied into
SMTK(vtkLIDARElevationFilter, rtvl library, vtkTexturePointIntensityFilter,
vtkLIDARPtsWriter, vtkHydroModelPolySource and
vtkTerrainEtractionFilter.) CMB should delete these duplicated classes for
simplicity.

One thing worth mentioning is that minimum spacing computation is a
simplified version of it's PointsBuilder counterpart. ClipPolygons and
PointThresholdFilter is not used.

This MR creates the UI components for the terrain extraction(TE)
operator. A custom view as smtkTerrianExtractionView is added and
a new extension VXL is introduced.

Having this policy (Double colon in target name means ALIAS or IMPORTED target)
set to `OLD` only makes sense when CMake 2.8.12 or older. We require a much
newer CMake (3.6), so accept `NEW` as the default.

Use SMTK_PYTHON_MODULEDIR, same as Shiboken case
Also prefix shared objects with underscore, to indicate they are internal

Kitware Robot authored 8 years ago and T.J. Corona committed 8 years ago

Code extracted from:

    https://gitlab.kitware.com/third-party/moab.git

at commit 3c60766babe10d1cb7f2f3de09982e050b7ec506 (for/smtk).

Requires boost date_time library

The HDF5 bug is fixed in 3.6. Rather than not working with 3.6 and up as
before, let's drop 3.5.