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annotate python/ubc_utils.py @ 16:9d6831cfe675

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added tools for speed
author Nicolas Saunier <nico@confins.net>
date Wed, 18 Nov 2009 18:36:52 -0500
parents 30559b2cf7a9
children 28e546861263
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30559b2cf7a9 minimal code to load UBC data
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1 #! /usr/bin/env python
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2 '''Various utilities to load data saved by the UBC tool(s)'''
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4 import utils
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5 from moving import MovingObject, TimeInterval, Trajectory
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7 __metaclass__ = type
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9 delimiterChar = '%';
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11 def getLines(f):
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12 '''Gets a complete entry (all the lines) in between delimiterChar.'''
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13 dataStrings = []
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14 s = utils.readline(f)
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15 while (len(s) > 0) and (not s.startswith(delimiterChar)):
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16 dataStrings += [s.strip()]
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17 s = utils.readline(f)
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18 return dataStrings
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20 def loadTrajectories(filename, nObjects = -1):
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21 '''Loads trajectories'''
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23 file = utils.openCheck(filename)
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24 if (not file):
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25 return []
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27 objects = []
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28 objNum = 0
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29 lines = getLines(file)
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30 while (lines != []) and ((nObjects<0) or (objNum<nObjects)):
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31 l = lines[0].split(' ')
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32 parsedLine = [int(n) for n in l[:4]]
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33 obj = MovingObject(num = objNum, timeInterval = TimeInterval(parsedLine[1],parsedLine[2]))
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34 add = True
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35 if (len(lines) >= 3):
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36 obj.positions = Trajectory([[float(n) for n in lines[1].split(' ')],
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37 [float(n) for n in lines[2].split(' ')]])
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38 if (len(lines) >= 5):
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39 obj.velocities = Trajectory([[float(n) for n in lines[3].split(' ')],
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40 [float(n) for n in lines[4].split(' ')]])
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42 if len(lines) != 2:
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43 objects.append(obj)
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44 objNum+=1
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45 else:
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46 print("Error two lines of data for feature %d"%(f.num))
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47
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48 lines = getLines(file)
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50 file.close()
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51 return objects
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