From e2de81045f54bed2db815e613c31b6aa41945f44 Mon Sep 17 00:00:00 2001
From: Paul Romano <paul.k.romano@gmail.com>
Date: Thu, 19 May 2022 13:27:02 -0400
Subject: [PATCH] Update track_output regression test

---
 .../track_output/results_true.dat             | 183 +++++++++++++++++-
 .../track_output/settings.xml                 |   3 +-
 tests/regression_tests/track_output/test.py   |  21 +-
 3 files changed, 189 insertions(+), 18 deletions(-)

diff --git a/tests/regression_tests/track_output/results_true.dat b/tests/regression_tests/track_output/results_true.dat
index 1d0ca8039..981625bf7 100644
--- a/tests/regression_tests/track_output/results_true.dat
+++ b/tests/regression_tests/track_output/results_true.dat
@@ -1,9 +1,174 @@
-<?xml version="1.0"?>
-<VTKFile type="PPolyData" version="0.1" byte_order="LittleEndian" header_type="UInt32" compressor="vtkZLibDataCompressor">
-  <PPolyData GhostLevel="0">
-    <PPoints>
-      <PDataArray type="Float32" Name="Points" NumberOfComponents="3"/>
-    </PPoints>
-    <Piece Source="poly_0.vtp"/>
-  </PPolyData>
-</VTKFile>
+[ParticleTrack(particle=<ParticleType.NEUTRON: 0>, states=array([((-9.663085e-01, -6.616522e-01, -9.863690e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 0.000000e+00, 1.000000e+00, 23, 1),
+       ((-1.281491e+00, -4.879529e-01, -7.708709e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 1.323629e-10, 1.000000e+00, 22, 3),
+       ((-1.368452e+00, -4.400285e-01, -7.114141e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 1.688824e-10, 1.000000e+00, 21, 2),
+       ((-2.150539e+00, -9.015151e-03, -1.766823e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 4.973246e-10, 1.000000e+00, 22, 3),
+       ((-2.237499e+00, 3.890922e-02, -1.172255e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 5.338441e-10, 1.000000e+00, 23, 1),
+       ((-2.453640e+00, 1.580257e-01, 3.055504e-02), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 6.246136e-10, 1.000000e+00, 23, 1),
+       ((-2.767485e+00, 3.309877e-01, 2.451383e-01), (-7.513921e-01, 4.140970e-01, 5.137447e-01), 5.293873e+06, 7.564146e-10, 1.000000e+00, 22, 3),
+       ((-2.825099e+00, 3.627392e-01, 2.845305e-01), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 7.806100e-10, 1.000000e+00, 22, 3),
+       ((-3.274427e+00, 6.029890e-01, 6.987901e-01), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 9.878481e-10, 1.000000e+00, 23, 1),
+       ((-3.676327e+00, 8.178800e-01, 1.069324e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 1.173212e-09, 1.000000e+00, 23, 1),
+       ((-4.089400e+00, 1.038745e+00, 1.450158e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 1.363728e-09, 1.000000e+00, 23, 1),
+       ((-4.456639e+00, 1.235102e+00, 1.788735e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 1.533105e-09, 1.000000e+00, 22, 3),
+       ((-4.536974e+00, 1.278056e+00, 1.862800e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 1.570157e-09, 1.000000e+00, 21, 2),
+       ((-5.410401e+00, 1.745067e+00, 2.668060e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 1.972998e-09, 1.000000e+00, 22, 3),
+       ((-5.490736e+00, 1.788021e+00, 2.742125e+00), (-6.842434e-01, 3.658561e-01, 6.308409e-01), 5.292729e+06, 2.010050e-09, 1.000000e+00, 23, 1),
+       ((-5.576301e+00, 1.833771e+00, 2.821012e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 2.049514e-09, 1.000000e+00, 23, 1),
+       ((-5.725160e+00, 1.896661e+00, 2.330311e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 2.227030e-09, 1.000000e+00, 23, 1),
+       ((-6.116514e+00, 2.061999e+00, 1.040248e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 2.693724e-09, 1.000000e+00, 22, 3),
+       ((-6.534762e+00, 2.238699e+00, -3.384686e-01), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 3.192489e-09, 1.000000e+00, 23, 1),
+       ((-7.043525e+00, 2.453640e+00, -2.015560e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 3.799195e-09, 1.000000e+00, 23, 1),
+       ((-7.360920e+00, 2.587732e+00, -3.061825e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 4.177692e-09, 1.000000e+00, 11, 1),
+       ((-8.996680e+00, 3.278803e+00, -8.453960e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 6.128354e-09, 1.000000e+00, 23, 1),
+       ((-9.220205e+00, 3.373238e+00, -9.190791e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 6.394910e-09, 1.000000e+00, 22, 3),
+       ((-9.320244e+00, 3.415502e+00, -9.520561e+00), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 6.514208e-09, 1.000000e+00, 21, 2),
+       ((-1.005591e+01, 3.726304e+00, -1.194562e+01), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 7.391498e-09, 1.000000e+00, 22, 3),
+       ((-1.015595e+01, 3.768569e+00, -1.227539e+01), (-2.881377e-01, 1.217316e-01, -9.498200e-01), 4.458753e+06, 7.510796e-09, 1.000000e+00, 23, 1),
+       ((-1.062054e+01, 3.964848e+00, -1.380687e+01), (-5.395885e-01, 2.109921e-01, -8.150623e-01), 4.068754e+06, 8.064826e-09, 1.000000e+00, 23, 1),
+       ((-1.063244e+01, 3.969501e+00, -1.382484e+01), (-5.395885e-01, 2.109921e-01, -8.150623e-01), 4.068754e+06, 8.072756e-09, 1.000000e+00, 23, 1),
+       ((-1.093907e+01, 4.089400e+00, -1.428802e+01), (-5.395885e-01, 2.109921e-01, -8.150623e-01), 4.068754e+06, 8.277097e-09, 1.000000e+00, 23, 1),
+       ((-1.108410e+01, 4.146112e+00, -1.450710e+01), (4.855193e-01, 3.316053e-01, -8.088937e-01), 8.856868e+05, 8.373750e-09, 1.000000e+00, 23, 1),
+       ((-1.080173e+01, 4.338973e+00, -1.497755e+01), (2.818553e-01, 5.419536e-02, -9.579251e-01), 7.653670e+05, 8.820862e-09, 1.000000e+00, 23, 1),
+       ((-1.063244e+01, 4.371524e+00, -1.555290e+01), (2.818553e-01, 5.419536e-02, -9.579251e-01), 7.653670e+05, 9.317522e-09, 1.000000e+00, 23, 1),
+       ((-1.041266e+01, 4.413783e+00, -1.629984e+01), (2.686183e-01, -3.269476e-01, -9.060626e-01), 6.562001e+05, 9.962308e-09, 1.000000e+00, 23, 1),
+       ((-1.016754e+01, 4.115428e+00, -1.712667e+01), (-6.340850e-01, -7.142137e-01, -2.963697e-01), 7.155058e+04, 1.077718e-08, 1.000000e+00, 23, 1),
+       ((-1.019064e+01, 4.089400e+00, -1.713747e+01), (-6.340850e-01, -7.142137e-01, -2.963697e-01), 7.155058e+04, 1.087569e-08, 1.000000e+00, 23, 1),
+       ((-1.024915e+01, 4.023496e+00, -1.716481e+01), (1.827568e-01, -7.452255e-01, -6.412791e-01), 2.628504e+04, 1.112511e-08, 1.000000e+00, 23, 1),
+       ((-1.018199e+01, 3.749638e+00, -1.740047e+01), (1.827568e-01, -7.452255e-01, -6.412791e-01), 2.628504e+04, 1.276389e-08, 1.000000e+00, 22, 3),
+       ((-1.015866e+01, 3.654498e+00, -1.748234e+01), (1.827568e-01, -7.452255e-01, -6.412791e-01), 2.628504e+04, 1.333321e-08, 1.000000e+00, 21, 2),
+       ((-1.009978e+01, 3.414404e+00, -1.768895e+01), (1.735861e-01, -9.678731e-01, 1.819053e-01), 2.620416e+04, 1.476994e-08, 1.000000e+00, 21, 2),
+       ((-9.994809e+00, 2.829099e+00, -1.757894e+01), (4.635724e-01, 5.558106e-01, 6.900545e-01), 2.214649e+04, 1.747088e-08, 1.000000e+00, 21, 2),
+       ((-9.553365e+00, 3.358379e+00, -1.692183e+01), (-5.990363e-01, 3.483710e-01, -7.209668e-01), 1.813617e+04, 2.209726e-08, 1.000000e+00, 21, 2),
+       ((-1.011854e+01, 3.687059e+00, -1.760205e+01), (-5.990363e-01, 3.483710e-01, -7.209668e-01), 1.813617e+04, 2.716243e-08, 1.000000e+00, 22, 3),
+       ((-1.020058e+01, 3.734765e+00, -1.770077e+01), (-5.990363e-01, 3.483710e-01, -7.209668e-01), 1.813617e+04, 2.789760e-08, 1.000000e+00, 23, 1),
+       ((-1.063244e+01, 3.985917e+00, -1.822054e+01), (-5.990363e-01, 3.483710e-01, -7.209668e-01), 1.813617e+04, 3.176800e-08, 1.000000e+00, 23, 1),
+       ((-1.081038e+01, 4.089400e+00, -1.843470e+01), (-5.990363e-01, 3.483710e-01, -7.209668e-01), 1.813617e+04, 3.336273e-08, 1.000000e+00, 23, 1),
+       ((-1.081564e+01, 4.092455e+00, -1.844103e+01), (-6.690877e-01, 6.718700e-01, -3.176671e-01), 1.355236e+04, 3.340982e-08, 1.000000e+00, 23, 1),
+       ((-1.096190e+01, 4.239327e+00, -1.851047e+01), (-5.904492e-01, 8.058629e-01, 4.421237e-02), 1.153343e+04, 3.476743e-08, 1.000000e+00, 23, 1),
+       ((-1.109457e+01, 4.420404e+00, -1.850054e+01), (-5.904492e-01, 8.058629e-01, 4.421237e-02), 1.153343e+04, 3.628014e-08, 1.000000e+00, 22, 3),
+       ((-1.113484e+01, 4.475368e+00, -1.849752e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 3.673931e-08, 1.000000e+00, 22, 3),
+       ((-1.117187e+01, 4.372425e+00, -1.850142e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 3.748914e-08, 1.000000e+00, 23, 1),
+       ((-1.127367e+01, 4.089400e+00, -1.851213e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 3.955064e-08, 1.000000e+00, 23, 1),
+       ((-1.135375e+01, 3.866733e+00, -1.852056e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 4.117251e-08, 1.000000e+00, 22, 3),
+       ((-1.138419e+01, 3.782113e+00, -1.852377e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 4.178887e-08, 1.000000e+00, 21, 2),
+       ((-1.172456e+01, 2.835777e+00, -1.855959e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 4.868184e-08, 1.000000e+00, 22, 3),
+       ((-1.175499e+01, 2.751157e+00, -1.856280e+01), (-3.382310e-01, -9.403895e-01, -3.560132e-02), 1.114105e+04, 4.929820e-08, 1.000000e+00, 23, 1),
+       ((-1.179525e+01, 2.639224e+00, -1.856703e+01), (-4.738733e-01, -7.934600e-01, 3.819231e-01), 8.873828e+03, 5.011351e-08, 1.000000e+00, 23, 1),
+       ((-1.190609e+01, 2.453640e+00, -1.847770e+01), (-4.738733e-01, -7.934600e-01, 3.819231e-01), 8.873828e+03, 5.190861e-08, 1.000000e+00, 23, 1),
+       ((-1.222017e+01, 1.927741e+00, -1.822457e+01), (-5.716267e-01, 2.823908e-01, 7.703884e-01), 1.028345e+03, 5.699551e-08, 1.000000e+00, 23, 1),
+       ((-1.226820e+01, 1.951470e+00, -1.815983e+01), (-5.716267e-01, 2.823908e-01, 7.703884e-01), 1.028345e+03, 5.888995e-08, 1.000000e+00, 23, 1),
+       ((-1.236181e+01, 1.997712e+00, -1.803368e+01), (1.748787e-01, 6.613493e-01, 7.294070e-01), 4.250133e+02, 6.258186e-08, 1.000000e+00, 23, 1),
+       ((-1.234968e+01, 2.043587e+00, -1.798308e+01), (-6.043263e-01, 1.493281e-01, 7.826180e-01), 4.022525e+02, 6.501444e-08, 1.000000e+00, 23, 1),
+       ((-1.276513e+01, 2.146245e+00, -1.744506e+01), (-6.043263e-01, 1.493281e-01, 7.826180e-01), 4.022525e+02, 8.979603e-08, 1.000000e+00, 22, 3),
+       ((-1.313233e+01, 2.236980e+00, -1.696953e+01), (-6.043263e-01, 1.493281e-01, 7.826180e-01), 4.022525e+02, 1.116994e-07, 1.000000e+00, 23, 1),
+       ((-1.318468e+01, 2.249916e+00, -1.690173e+01), (-8.862976e-01, -6.402442e-02, 4.586692e-01), 3.113244e+02, 1.148223e-07, 1.000000e+00, 23, 1),
+       ((-1.363685e+01, 2.217253e+00, -1.666773e+01), (5.149966e-01, 4.184610e-01, -7.481102e-01), 2.471907e+02, 1.357269e-07, 1.000000e+00, 23, 1),
+       ((-1.334593e+01, 2.453640e+00, -1.709033e+01), (5.149966e-01, 4.184610e-01, -7.481102e-01), 2.471907e+02, 1.617034e-07, 1.000000e+00, 23, 1),
+       ((-1.308145e+01, 2.668542e+00, -1.747452e+01), (5.149966e-01, 4.184610e-01, -7.481102e-01), 2.471907e+02, 1.853189e-07, 1.000000e+00, 22, 3),
+       ((-1.304150e+01, 2.701005e+00, -1.753256e+01), (-1.624676e-01, -9.847331e-01, 6.248920e-02), 2.387811e+02, 1.888862e-07, 1.000000e+00, 22, 3),
+       ((-1.304665e+01, 2.669815e+00, -1.753058e+01), (-1.624676e-01, -9.847331e-01, 6.248920e-02), 2.387811e+02, 1.903682e-07, 1.000000e+00, 23, 1),
+       ((-1.308231e+01, 2.453640e+00, -1.751686e+01), (-1.624676e-01, -9.847331e-01, 6.248920e-02), 2.387811e+02, 2.006392e-07, 1.000000e+00, 23, 1),
+       ((-1.311790e+01, 2.237916e+00, -1.750317e+01), (-1.624676e-01, -9.847331e-01, 6.248920e-02), 2.387811e+02, 2.108888e-07, 1.000000e+00, 22, 3),
+       ((-1.313266e+01, 2.148507e+00, -1.749750e+01), (-1.624676e-01, -9.847331e-01, 6.248920e-02), 2.387811e+02, 2.151369e-07, 1.000000e+00, 21, 2),
+       ((-1.320190e+01, 1.728791e+00, -1.747087e+01), (1.090151e-01, 4.333767e-01, -8.945950e-01), 2.357642e+02, 2.350787e-07, 1.000000e+00, 21, 2),
+       ((-1.309582e+01, 2.150526e+00, -1.834143e+01), (1.090151e-01, 4.333767e-01, -8.945950e-01), 2.357642e+02, 2.808996e-07, 1.000000e+00, 22, 3),
+       ((-1.307365e+01, 2.238628e+00, -1.852329e+01), (1.090151e-01, 4.333767e-01, -8.945950e-01), 2.357642e+02, 2.904717e-07, 1.000000e+00, 23, 1),
+       ((-1.301957e+01, 2.453640e+00, -1.896713e+01), (1.090151e-01, 4.333767e-01, -8.945950e-01), 2.357642e+02, 3.138324e-07, 1.000000e+00, 23, 1),
+       ((-1.297913e+01, 2.614390e+00, -1.929896e+01), (6.012134e-01, 7.985735e-01, -2.868317e-02), 4.041011e+01, 3.312976e-07, 1.000000e+00, 23, 1),
+       ((-1.295975e+01, 2.640133e+00, -1.929988e+01), (6.762805e-01, -5.875192e-01, 4.443713e-01), 3.527833e+01, 3.349640e-07, 1.000000e+00, 23, 1),
+       ((-1.282907e+01, 2.526604e+00, -1.921402e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 3.584852e-07, 1.000000e+00, 23, 1),
+       ((-1.284217e+01, 2.453640e+00, -1.921346e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 3.799102e-07, 1.000000e+00, 23, 1),
+       ((-1.288683e+01, 2.204886e+00, -1.921158e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 4.529534e-07, 1.000000e+00, 22, 3),
+       ((-1.290264e+01, 2.116831e+00, -1.921091e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 4.788097e-07, 1.000000e+00, 21, 2),
+       ((-1.308145e+01, 1.120923e+00, -1.920338e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 7.712448e-07, 1.000000e+00, 22, 3),
+       ((-1.309726e+01, 1.032868e+00, -1.920271e+01), (-1.767101e-01, -9.842348e-01, 7.448995e-03), 6.258032e+00, 7.971010e-07, 1.000000e+00, 23, 1),
+       ((-1.312690e+01, 8.677798e-01, -1.920146e+01), (-6.009065e-01, -7.617185e-01, 2.422732e-01), 3.971935e+00, 8.455768e-07, 1.000000e+00, 23, 1),
+       ((-1.316626e+01, 8.178800e-01, -1.918559e+01), (-6.009065e-01, -7.617185e-01, 2.422732e-01), 3.971935e+00, 8.693415e-07, 1.000000e+00, 23, 1),
+       ((-1.324019e+01, 7.241633e-01, -1.915578e+01), (-9.367321e-01, -1.471894e-01, -3.175976e-01), 2.365289e+00, 9.139738e-07, 1.000000e+00, 23, 1),
+       ((-1.348497e+01, 6.857011e-01, -1.923877e+01), (-9.722929e-01, 2.325825e-01, -2.349230e-02), 1.799413e+00, 1.036815e-06, 1.000000e+00, 23, 1),
+       ((-1.390396e+01, 7.859275e-01, -1.924890e+01), (-9.722929e-01, 2.325825e-01, -2.349230e-02), 1.799413e+00, 1.269071e-06, 1.000000e+00, 23, 1),
+       ((-1.403754e+01, 8.178800e-01, -1.925212e+01), (-9.722929e-01, 2.325825e-01, -2.349230e-02), 1.799413e+00, 1.343115e-06, 1.000000e+00, 23, 1),
+       ((-1.504223e+01, 1.058212e+00, -1.927640e+01), (-4.085804e-01, -2.719942e-01, -8.712526e-01), 1.628266e+00, 1.900041e-06, 1.000000e+00, 23, 1),
+       ((-1.523744e+01, 9.282558e-01, -1.969268e+01), (-6.666265e-01, 3.934879e-01, -6.330690e-01), 4.946445e-01, 2.170751e-06, 1.000000e+00, 23, 1),
+       ((-1.553972e+01, 1.106680e+00, -1.997974e+01), (-6.666265e-01, 3.934879e-01, -6.330690e-01), 4.946445e-01, 2.636878e-06, 1.000000e+00, 23, 1),
+       ((-1.585973e+01, 1.295571e+00, -2.028364e+01), (-6.666265e-01, 3.934879e-01, -6.330690e-01), 4.946445e-01, 3.130348e-06, 1.000000e+00, 22, 3),
+       ((-1.593583e+01, 1.340489e+00, -2.035590e+01), (-6.666265e-01, 3.934879e-01, -6.330690e-01), 4.946445e-01, 3.247693e-06, 1.000000e+00, 21, 2),
+       ((-1.647184e+01, 1.656882e+00, -2.086494e+01), (6.457458e-01, -1.162934e-01, -7.546444e-01), 4.958073e-01, 4.074258e-06, 1.000000e+00, 21, 2),
+       ((-1.585080e+01, 1.545037e+00, -2.159072e+01), (6.457458e-01, -1.162934e-01, -7.546444e-01), 4.958073e-01, 5.061748e-06, 1.000000e+00, 22, 3),
+       ((-1.576406e+01, 1.529415e+00, -2.169209e+01), (6.457458e-01, -1.162934e-01, -7.546444e-01), 4.958073e-01, 5.199673e-06, 1.000000e+00, 23, 1),
+       ((-1.553972e+01, 1.489015e+00, -2.195425e+01), (6.457458e-01, -1.162934e-01, -7.546444e-01), 4.958073e-01, 5.556377e-06, 1.000000e+00, 23, 1),
+       ((-1.546081e+01, 1.474803e+00, -2.204648e+01), (3.257038e-01, -9.420596e-01, -8.025439e-02), 3.076319e-01, 5.681852e-06, 1.000000e+00, 23, 1),
+       ((-1.543563e+01, 1.401988e+00, -2.205268e+01), (-3.677195e-01, -8.784218e-01, -3.052172e-01), 8.422973e-02, 5.782605e-06, 1.000000e+00, 23, 1),
+       ((-1.553972e+01, 1.153338e+00, -2.213907e+01), (-3.677195e-01, -8.784218e-01, -3.052172e-01), 8.422973e-02, 6.487752e-06, 1.000000e+00, 23, 1),
+       ((-1.565955e+01, 8.670807e-01, -2.223854e+01), (1.611814e-01, 2.692337e-01, -9.494913e-01), 8.559448e-02, 7.299552e-06, 1.000000e+00, 23, 1),
+       ((-1.563263e+01, 9.120446e-01, -2.239711e+01), (-6.773989e-01, 6.985688e-01, -2.305048e-01), 3.418159e-02, 7.712256e-06, 1.000000e+00, 23, 1),
+       ((-1.592604e+01, 1.214620e+00, -2.249695e+01), (-6.773989e-01, 6.985688e-01, -2.305048e-01), 3.418159e-02, 9.406031e-06, 1.000000e+00, 22, 3),
+       ((-1.598742e+01, 1.277922e+00, -2.251784e+01), (-6.773989e-01, 6.985688e-01, -2.305048e-01), 3.418159e-02, 9.760391e-06, 1.000000e+00, 21, 2),
+       ((-1.670388e+01, 2.016770e+00, -2.276163e+01), (-6.773989e-01, 6.985688e-01, -2.305048e-01), 3.418159e-02, 1.389636e-05, 1.000000e+00, 22, 3),
+       ((-1.676526e+01, 2.080073e+00, -2.278252e+01), (-6.773989e-01, 6.985688e-01, -2.305048e-01), 3.418159e-02, 1.425072e-05, 1.000000e+00, 23, 1),
+       ((-1.681575e+01, 2.132139e+00, -2.279970e+01), (4.286076e-02, -9.409799e-01, -3.357375e-01), 1.813618e-02, 1.454218e-05, 1.000000e+00, 23, 1),
+       ((-1.681374e+01, 2.087933e+00, -2.281547e+01), (-7.741702e-02, -7.222450e-01, -6.872909e-01), 1.529603e-02, 1.479439e-05, 1.000000e+00, 23, 1),
+       ((-1.682083e+01, 2.021795e+00, -2.287841e+01), (-7.741702e-02, -7.222450e-01, -6.872909e-01), 1.529603e-02, 1.532970e-05, 1.000000e+00, 22, 3),
+       ((-1.684417e+01, 1.804084e+00, -2.308558e+01), (-7.741702e-02, -7.222450e-01, -6.872909e-01), 1.529603e-02, 1.709182e-05, 1.000000e+00, 21, 2),
+       ((-1.686879e+01, 1.574384e+00, -2.330417e+01), (-7.741702e-02, -7.222450e-01, -6.872909e-01), 1.529603e-02, 1.895097e-05, 1.000000e+00, 22, 3),
+       ((-1.689212e+01, 1.356673e+00, -2.351134e+01), (-7.741702e-02, -7.222450e-01, -6.872909e-01), 1.529603e-02, 2.071309e-05, 1.000000e+00, 23, 1),
+       ((-1.689233e+01, 1.354754e+00, -2.351317e+01), (6.002458e-01, 4.967948e-01, 6.268172e-01), 8.602342e-03, 2.072862e-05, 1.000000e+00, 23, 1),
+       ((-1.689148e+01, 1.355453e+00, -2.351229e+01), (6.002458e-01, 4.967948e-01, 6.268172e-01), 8.602342e-03, 2.073958e-05, 1.000000e+00, 22, 3),
+       ((-1.682182e+01, 1.413107e+00, -2.343954e+01), (6.002458e-01, 4.967948e-01, 6.268172e-01), 8.602342e-03, 2.164421e-05, 1.000000e+00, 21, 2),
+       ((-1.636364e+01, 1.792326e+00, -2.296107e+01), (9.641593e-01, -1.162836e-01, 2.384846e-01), 7.837617e-03, 2.759442e-05, 1.000000e+00, 21, 2),
+       ((-1.598564e+01, 1.746738e+00, -2.286758e+01), (9.641593e-01, -1.162836e-01, 2.384846e-01), 7.837617e-03, 3.079609e-05, 0.000000e+00, 21, 2)],
+      dtype=[('r', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('u', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('E', '<f8'), ('time', '<f8'), ('wgt', '<f8'), ('cell_id', '<i4'), ('material_id', '<i4')]))]
+[ParticleTrack(particle=<ParticleType.NEUTRON: 0>, states=array([((-9.469716e-01, -2.580266e-01, 1.414357e-01), (1.438873e-01, 2.365819e-01, 9.608983e-01), 9.724461e+05, 0.000000e+00, 1.000000e+00, 23, 1),
+       ((-9.064818e-01, -1.914524e-01, 4.118326e-01), (9.231638e-01, 3.100833e-01, 2.271937e-01), 1.746594e+05, 2.064696e-10, 1.000000e+00, 23, 1),
+       ((-8.178800e-01, -1.616918e-01, 4.336377e-01), (9.231638e-01, 3.100833e-01, 2.271937e-01), 1.746594e+05, 3.725262e-10, 1.000000e+00, 11, 1),
+       ((-3.834875e-01, -1.578285e-02, 5.405432e-01), (-5.547498e-01, -6.358598e-02, 8.295839e-01), 1.474011e+05, 1.186660e-09, 1.000000e+00, 11, 1),
+       ((-7.999329e-01, -6.351625e-02, 1.163304e+00), (-5.476898e-01, 2.985279e-03, 8.366761e-01), 1.467299e+05, 2.600465e-09, 1.000000e+00, 11, 1),
+       ((-8.178800e-01, -6.341842e-02, 1.190721e+00), (-5.476898e-01, 2.985279e-03, 8.366761e-01), 1.467299e+05, 2.662321e-09, 1.000000e+00, 23, 1),
+       ((-1.035984e+00, -6.222961e-02, 1.523906e+00), (-5.476898e-01, 2.985279e-03, 8.366761e-01), 1.467299e+05, 3.414026e-09, 1.000000e+00, 22, 3),
+       ((-1.124618e+00, -6.174649e-02, 1.659308e+00), (-5.476898e-01, 2.985279e-03, 8.366761e-01), 1.467299e+05, 3.719509e-09, 1.000000e+00, 21, 2),
+       ((-1.705404e+00, -5.858082e-02, 2.546543e+00), (-3.196694e-01, -8.974451e-01, 3.039799e-01), 1.460188e+05, 5.721217e-09, 1.000000e+00, 21, 2),
+       ((-1.851116e+00, -4.676544e-01, 2.685103e+00), (-3.196694e-01, -8.974451e-01, 3.039799e-01), 1.460188e+05, 6.583734e-09, 1.000000e+00, 22, 3),
+       ((-1.880791e+00, -5.509662e-01, 2.713322e+00), (-3.196694e-01, -8.974451e-01, 3.039799e-01), 1.460188e+05, 6.759394e-09, 1.000000e+00, 23, 1),
+       ((-1.948026e+00, -7.397227e-01, 2.777257e+00), (-8.068708e-01, -5.218555e-01, -2.768147e-01), 6.012975e+04, 7.157380e-09, 1.000000e+00, 23, 1),
+       ((-2.068870e+00, -8.178800e-01, 2.735799e+00), (-8.068708e-01, -5.218555e-01, -2.768147e-01), 6.012975e+04, 7.598974e-09, 1.000000e+00, 23, 1),
+       ((-2.111345e+00, -8.453511e-01, 2.721228e+00), (-4.440083e-01, -4.097242e-01, 7.968580e-01), 7.445994e+03, 7.754188e-09, 1.000000e+00, 23, 1),
+       ((-2.453640e+00, -1.161216e+00, 3.335542e+00), (-4.440083e-01, -4.097242e-01, 7.968580e-01), 7.445994e+03, 1.421339e-08, 1.000000e+00, 23, 1),
+       ((-2.715369e+00, -1.402736e+00, 3.805265e+00), (-4.440083e-01, -4.097242e-01, 7.968580e-01), 7.445994e+03, 1.915229e-08, 1.000000e+00, 22, 3),
+       ((-2.785083e+00, -1.467067e+00, 3.930380e+00), (-4.440083e-01, -4.097242e-01, 7.968580e-01), 7.445994e+03, 2.046780e-08, 1.000000e+00, 21, 2),
+       ((-2.940196e+00, -1.610203e+00, 4.208760e+00), (-7.727102e-01, 4.333905e-01, -4.637797e-01), 6.395532e+03, 2.339483e-08, 1.000000e+00, 21, 2),
+       ((-3.600602e+00, -1.239800e+00, 3.812386e+00), (-7.727102e-01, 4.333905e-01, -4.637797e-01), 6.395532e+03, 3.112139e-08, 1.000000e+00, 22, 3),
+       ((-3.682067e+00, -1.194109e+00, 3.763490e+00), (-7.727102e-01, 4.333905e-01, -4.637797e-01), 6.395532e+03, 3.207450e-08, 1.000000e+00, 23, 1),
+       ((-4.089400e+00, -9.656478e-01, 3.519009e+00), (-7.727102e-01, 4.333905e-01, -4.637797e-01), 6.395532e+03, 3.684019e-08, 1.000000e+00, 23, 1),
+       ((-4.185927e+00, -9.115084e-01, 3.461074e+00), (4.334152e-01, -1.576729e-02, -9.010564e-01), 2.532713e+01, 3.796953e-08, 1.000000e+00, 23, 1),
+       ((-4.089400e+00, -9.150200e-01, 3.260397e+00), (4.334152e-01, -1.576729e-02, -9.010564e-01), 2.532713e+01, 6.996444e-08, 1.000000e+00, 23, 1),
+       ((-3.920090e+00, -9.211794e-01, 2.908406e+00), (9.094673e-01, -3.659267e-01, -1.974002e-01), 9.547085e+00, 1.260840e-07, 1.000000e+00, 23, 1),
+       ((-3.729948e+00, -9.976834e-01, 2.867135e+00), (-2.916959e-01, -6.494657e-01, -7.022164e-01), 8.590591e+00, 1.750036e-07, 1.000000e+00, 23, 1),
+       ((-3.744933e+00, -1.031047e+00, 2.831062e+00), (-2.916959e-01, -6.494657e-01, -7.022164e-01), 8.590591e+00, 1.876753e-07, 0.000000e+00, 23, 1)],
+      dtype=[('r', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('u', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('E', '<f8'), ('time', '<f8'), ('wgt', '<f8'), ('cell_id', '<i4'), ('material_id', '<i4')]))]
+[ParticleTrack(particle=<ParticleType.NEUTRON: 0>, states=array([((-9.896300e-01, -6.241550e-01, 7.890184e-01), (-4.012123e-01, 9.073327e-01, 1.256028e-01), 4.434429e+05, 0.000000e+00, 1.000000e+00, 23, 1),
+       ((-1.124354e+00, -3.194804e-01, 8.311948e-01), (-4.012123e-01, 9.073327e-01, 1.256028e-01), 4.434429e+05, 3.646971e-10, 1.000000e+00, 22, 3),
+       ((-1.169278e+00, -2.178843e-01, 8.452588e-01), (-4.012123e-01, 9.073327e-01, 1.256028e-01), 4.434429e+05, 4.863081e-10, 1.000000e+00, 21, 2),
+       ((-1.200617e+00, -1.470127e-01, 8.550696e-01), (4.985110e-01, -3.420076e-01, -7.965661e-01), 4.374324e+05, 5.711419e-10, 1.000000e+00, 21, 2),
+       ((-1.153218e+00, -1.795315e-01, 7.793306e-01), (4.985110e-01, -3.420076e-01, -7.965661e-01), 4.374324e+05, 6.751152e-10, 1.000000e+00, 22, 3),
+       ((-1.078639e+00, -2.306964e-01, 6.601629e-01), (4.985110e-01, -3.420076e-01, -7.965661e-01), 4.374324e+05, 8.387067e-10, 1.000000e+00, 23, 1),
+       ((-8.498389e-01, -3.876669e-01, 2.945646e-01), (1.295621e-01, -9.522956e-01, 2.763092e-01), 1.185198e+04, 1.340594e-09, 1.000000e+00, 23, 1),
+       ((-8.178800e-01, -6.225680e-01, 3.627213e-01), (1.295621e-01, -9.522956e-01, 2.763092e-01), 1.185198e+04, 2.978729e-09, 1.000000e+00, 11, 1),
+       ((-7.913073e-01, -8.178800e-01, 4.193912e-01), (1.295621e-01, -9.522956e-01, 2.763092e-01), 1.185198e+04, 4.340781e-09, 1.000000e+00, 23, 1),
+       ((-5.687582e-01, -2.453640e+00, 8.940079e-01), (1.295621e-01, -9.522956e-01, 2.763092e-01), 1.185198e+04, 1.574812e-08, 1.000000e+00, 23, 1),
+       ((-5.396956e-01, -2.667253e+00, 9.559878e-01), (8.346010e-01, -1.159281e-01, 5.385183e-01), 1.587581e+03, 1.723779e-08, 1.000000e+00, 23, 1),
+       ((-2.229408e-01, -2.711251e+00, 1.160371e+00), (8.346010e-01, -1.159281e-01, 5.385183e-01), 1.587581e+03, 2.412440e-08, 1.000000e+00, 22, 3),
+       ((3.672002e-01, -2.793223e+00, 1.541154e+00), (8.346010e-01, -1.159281e-01, 5.385183e-01), 1.587581e+03, 3.695471e-08, 1.000000e+00, 23, 1),
+       ((8.178800e-01, -2.855823e+00, 1.831950e+00), (8.346010e-01, -1.159281e-01, 5.385183e-01), 1.587581e+03, 4.675299e-08, 1.000000e+00, 23, 1),
+       ((8.973133e-01, -2.866857e+00, 1.883204e+00), (8.867277e-01, -4.590349e-01, 5.478139e-02), 1.077251e+03, 4.847996e-08, 1.000000e+00, 23, 1),
+       ((1.109695e+00, -2.976801e+00, 1.896325e+00), (8.867277e-01, -4.590349e-01, 5.478139e-02), 1.077251e+03, 5.375585e-08, 1.000000e+00, 22, 3),
+       ((1.188016e+00, -3.017346e+00, 1.901163e+00), (8.867277e-01, -4.590349e-01, 5.478139e-02), 1.077251e+03, 5.570149e-08, 1.000000e+00, 21, 2),
+       ((2.101785e+00, -3.490379e+00, 1.957615e+00), (8.867277e-01, -4.590349e-01, 5.478139e-02), 1.077251e+03, 7.840096e-08, 1.000000e+00, 22, 3),
+       ((2.180107e+00, -3.530924e+00, 1.962454e+00), (8.867277e-01, -4.590349e-01, 5.478139e-02), 1.077251e+03, 8.034660e-08, 1.000000e+00, 23, 1),
+       ((2.331655e+00, -3.609377e+00, 1.971817e+00), (5.352328e-01, -1.825854e-01, 8.247353e-01), 3.972292e+02, 8.411129e-08, 1.000000e+00, 23, 1),
+       ((2.453640e+00, -3.650990e+00, 2.159783e+00), (5.352328e-01, -1.825854e-01, 8.247353e-01), 3.972292e+02, 9.237876e-08, 1.000000e+00, 11, 1),
+       ((3.052522e+00, -3.855288e+00, 3.082595e+00), (-6.240259e-01, 3.743550e-01, 6.858936e-01), 7.908847e+00, 1.329675e-07, 1.000000e+00, 11, 1),
+       ((2.955791e+00, -3.797259e+00, 3.188916e+00), (-8.018916e-01, -4.124485e-01, 4.322686e-01), 3.121121e+00, 1.728180e-07, 1.000000e+00, 11, 1),
+       ((2.937908e+00, -3.806457e+00, 3.198556e+00), (-4.476221e-02, -9.803939e-01, -1.918959e-01), 1.564715e+00, 1.819446e-07, 1.000000e+00, 11, 1),
+       ((2.924989e+00, -4.089400e+00, 3.143175e+00), (-4.476221e-02, -9.803939e-01, -1.918959e-01), 1.564715e+00, 3.487493e-07, 1.000000e+00, 23, 1),
+       ((2.922113e+00, -4.152398e+00, 3.130844e+00), (-4.476221e-02, -9.803939e-01, -1.918959e-01), 1.564715e+00, 3.858887e-07, 0.000000e+00, 23, 1)],
+      dtype=[('r', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('u', [('x', '<f8'), ('y', '<f8'), ('z', '<f8')]), ('E', '<f8'), ('time', '<f8'), ('wgt', '<f8'), ('cell_id', '<i4'), ('material_id', '<i4')]))]
diff --git a/tests/regression_tests/track_output/settings.xml b/tests/regression_tests/track_output/settings.xml
index 299ee72c5..8c5829483 100644
--- a/tests/regression_tests/track_output/settings.xml
+++ b/tests/regression_tests/track_output/settings.xml
@@ -16,7 +16,8 @@
 
   <track>
     1 1 1
-    1 1 2
+    1 1 30
+    1 1 60
   </track>
 
 </settings>
diff --git a/tests/regression_tests/track_output/test.py b/tests/regression_tests/track_output/test.py
index 6fe2b52cc..06c7e15f5 100644
--- a/tests/regression_tests/track_output/test.py
+++ b/tests/regression_tests/track_output/test.py
@@ -3,6 +3,8 @@ import os
 from pathlib import Path
 from subprocess import call
 
+import numpy as np
+import openmc
 import pytest
 
 from tests.testing_harness import TestHarness, config
@@ -20,16 +22,19 @@ class TrackTestHarness(TestHarness):
             assert Path('tracks.h5').is_file()
 
     def _get_results(self):
-        """Digest info in the statepoint and return as a string."""
-        # Run the track-to-vtk conversion script.
-        call(['../../../scripts/openmc-track-to-vtk', '-o', 'poly'] +
-             glob.glob('tracks*.h5'))
+        """Get data from track file and return as a string."""
 
-        # Make sure the vtk file was created then return it's contents.
-        assert Path('poly.pvtp').is_file(), 'poly.pvtp file not found.'
+        # For MPI mode, combine track files
+        if config['mpi']:
+            call(['../../../scripts/openmc-track-combine', '-o', 'tracks.h5'] +
+                 glob.glob('tracks_p*.h5'))
 
-        with open('poly.pvtp', 'r') as fin:
-            outstr = fin.read()
+        # Get string of track file information
+        outstr = ''
+        tracks = openmc.TrackFile('tracks.h5')
+        for track in tracks:
+            with np.printoptions(formatter={'float_kind': '{:.6e}'.format}):
+                outstr += str(track.particles) + '\n'
 
         return outstr