From 3bae132b6d3b29481fd9879a6fc1f4452887e7bb Mon Sep 17 00:00:00 2001
From: Sterling Harper <smharper@mit.edu>
Date: Mon, 10 Jun 2013 22:08:27 -0400
Subject: [PATCH] Cleaned up Fortran implimentation of track writing and added
 track.py - a utility for converting binary track files to VTK files.

---
 src/utils/track.py | 77 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 77 insertions(+)
 create mode 100755 src/utils/track.py

diff --git a/src/utils/track.py b/src/utils/track.py
new file mode 100755
index 0000000000..7c836809ea
--- /dev/null
+++ b/src/utils/track.py
@@ -0,0 +1,77 @@
+#!/usr/bin/env python2
+"""Convert binary particle track to VTK poly data.
+
+Run 'track.py -help' for usage.
+
+"""
+
+import os
+import argparse
+import struct
+import vtk
+
+if __name__ == '__main__':
+    # Create argument parser.
+    parser = argparse.ArgumentParser(
+        description='Convert binary particle track file to a .pvtp file.')
+    parser.add_argument('input', metavar='IN', type=argparse.FileType('rb'),
+                        help='Input particle track data filename.')
+    parser.add_argument('-o', '-out', '--out', metavar='OUT', type=str, dest='out',
+                        help='Output VTK poly data filename.')
+    # Parse commandline arguments.
+    args = parser.parse_args()
+
+    # Make sure that the output filename ends with '.pvtp'.
+    if not args.out:
+        args.out = ''.join([os.path.splitext(args.input.name)[0], '.pvtp'])
+    elif os.path.splitext(args.out)[1] != '.pvtp':
+        args.out = ''.join([args.out, '.pvtp'])
+
+    # Convert binary data into a list of coordinate triplets.
+    track = args.input.read()
+    coords = [struct.unpack("ddd", track[24*i : 24*(i+1)])
+              for i in range(len(track)/24)]
+
+    # Create VTK points.
+    points = vtk.vtkPoints()
+    for triplet in coords:
+        points.InsertNextPoint(triplet)
+
+    # Create VTK line and assign points to line.
+    line = vtk.vtkPolyLine()
+    line.GetPointIds().SetNumberOfIds(points.GetNumberOfPoints())
+    for i in range(points.GetNumberOfPoints()):
+        line.GetPointIds().SetId(i,i)
+
+    cells = vtk.vtkCellArray()
+    cells.InsertNextCell(line)
+
+    data = vtk.vtkPolyData()
+    data.SetPoints(points)
+    data.SetLines(cells)
+
+    writer = vtk.vtkXMLPPolyDataWriter()
+    writer.SetInput(data)
+    writer.SetFileName(args.out)
+    writer.Write()
+
+##poly_mapper = vtk.vtkPolyDataMapper()
+##poly_mapper.SetInputConnection(data.GetProducerPort())
+##
+##poly_actor = vtk.vtkActor()
+##poly_actor.SetMapper(poly_mapper)
+##
+##ren1 = vtk.vtkRenderer()
+##ren1.AddActor(poly_actor)
+##ren1.SetBackground(0.0, 0.0, 0.0)
+##
+##ren1.ResetCamera()
+##
+##ren_win = vtk.vtkRenderWindow()
+##ren_win.AddRenderer(ren1)
+##ren_win.SetSize(400, 400)
+##
+##iren = vtk.vtkRenderWindowInteractor()
+##iren.SetRenderWindow(ren_win)
+##iren.Initialize()
+##iren.Start()