Since in applications using Python, Python may get finalized before all
VTK objects are released, we may encounter segfaults during exit. This
fixes that issue by ensuring that Python interpreter is initialized
before calling `Py_XDECREF`.

89fdf90c Use `vtkCharArray` for mask array
d8163549 Ensures output has as many rows as timesteps.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4226

7bde07c6 Update Accelerators/Vtkm to not produce any cpp check warnings
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4227

bbe2c7de Try to improve TestThreadedWriter
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4224

The charts, apparently, need the mask array to be vtkCharArray.
vtkExtractDataArraysOverTime was using vtkUnsignedCharArray which was
causing the mask array to be ignored. fixed that.

vtkExtractDataArraysOverTime produced output which may not have exactly
as many rows as number of timesteps if the last few timesteps didn't
have a valid dataset to extract. Fixed that.

Addresses paraview/paraview#18090

fec1894b Keep track of threads/workers and kill them explicitly
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Sebastien Jourdain <sebastien.jourdain@kitware.com>
Merge-request: !4212

6b90a46b do not use glDGetDouble on OpenGL ES
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4220

0449193b Merge branch 'upstream-KWSys' into update-kwsys
c1eb4427 KWSys 2018-04-24 (85c211d6)
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4221

* upstream-KWSys:
  KWSys 2018-04-24 (85c211d6)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 85c211d6c38e5ba8b24996148659bad1e7f04332 (master).

Upstream Shortlog
-----------------

Kyle Edwards (1):
      e5733515 Fix recent regression in installation of namelink

0241b75c Set vtkInteractionStylePython-TestStyleRubberBandZoomPerspective to run serial
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Michael Migliore <michael.migliore@kitware.com>
Acked-by: Nicolas Vuaille <nicolas.vuaille@kitware.com>
Merge-request: !4219

4634e50f Adding new StepTime related features to LPT
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Michael Migliore <michael.migliore@kitware.com>
Acked-by: Nicolas Vuaille <nicolas.vuaille@kitware.com>
Merge-request: !4178

OpenGL ES does not provide an API for it

This commits adds the following features to the lagrangian particle tracker
 * A maximum integration time to stop a particle based not on number of steps but on integration time
 * Add the possibility for a model to add their own particle path data

985e3326 Input is now generalized to vtkPointSet
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4218

ae73fcc4 Merge branch 'upstream-KWSys' into update-kwsys
0711c525 KWSys 2018-04-23 (aa0f06ec)
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4216

7ee39614 Fix for vtkTriangle::TrianglesIntersect() Issue #17092
ddda0845 Fix for vtkTriangle::TrianglesIntersect() Issue #17092
2db0d398 Undo copy vars for handover, format
74b517d3 Fix for vtkTriangle::TrianglesIntersect() Issue #17092
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !3886

88ff582e Update the HyperTreeGridSource to work in parallel.
c87e1b58 Hypertreegrid cleanup.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Allison Vacanti <allison.vacanti@kitware.com>
Acked-by: Philippe P. Pébaÿ <philippe.pebay@ng-analytics.com>
Reviewed-by: Philippe P. Pébaÿ <philippe.pebay@ng-analytics.com>
Merge-request: !4206

b4a8634b cmake: Set policy CMP0075 explicitly to avoid warnings
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4217

In post-3.11 development CMake added policy `CMP0075` that warns on our
include file checks done with `CMAKE_REQUIRED_LIBRARIES` set.  Our
checks can work with this combination so just set the policy to `NEW` to
suppress the warning.

* upstream-KWSys:
  KWSys 2018-04-23 (aa0f06ec)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit aa0f06ecce3418a91721cec4674e2d7c84147739 (master).

Upstream Shortlog
-----------------

Ben Boeckel (1):
      a3caaeec SystemTools: faster relative path codepath

Brad King (4):
      0a0974d0 SystemTools: Restore unconditional caching in GetActualCaseForPath
      a241fd13 SystemTools: Remove caching from public GetActualCaseForPath
      805d9a7c Terminal: Add xterm-kitty to VT100 color support whitelist
      c7ef6c1b SystemInformation: Do not include unnecessary fenv.h

Kyle Edwards (1):
      5b8bf75b INSTALL: move namelink into development component

luz.paz (1):
      94484960 Source typo fix s/[Pp]athes/[Pp]aths/

d6dd24d8 ParallelMomentInvariants: Exclude from all pending fixes
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4215

This module requires updates to fix compilation warnings and test
failures.  Exclude it from the "all" build until these fixes are made.

119e7022 updates to fix position file motions.
bd367d10 extend grammar to include '-' in file names.
Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Ken Martin <ken.martin@kitware.com>
Merge-request: !4203

c9b755bb Avoid reading into undefined heap; optimizing comparison on unsigned char
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4210

66a7df5d Volume 2D transfer function issue causing undefined variable shader errors
Acked-by: Kitware Robot <kwrobot@kitware.com>
Reviewed-by: Marcus D. Hanwell <marcus.hanwell@kitware.com>
Acked-by: Marcus D. Hanwell <marcus.hanwell@kitware.com>
Merge-request: !4209

838f6477 Style improvement for my fix in QVTKRenderWindowInteractor
ab589f1f Fix for QVTKRenderWindowInteractor for better support of retina displays
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4201

Fix issue where the uniform name was being incorrectly appended to
itself resulting in an unused variable with a long name
(e.g. g_gradients0g_gradients0g_gradients0).

This change fixes issue
[#1302](https://github.com/OpenChemistry/tomviz/issues/1302) reported on
tomviz issue tracker.

22163364 Improve ThreadedWriter test
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !4207

Addresses paraview/paraview#17568