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annotate python/moving.py @ 6:597d61c1eebe
minor doc update
author | Nicolas Saunier <nico@confins.net> |
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date | Wed, 04 Nov 2009 19:13:08 -0500 |
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1 #! /usr/bin/env python |
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2 '''Libraries for moving objects, trajectories...''' |
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3 |
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4 import utils; |
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5 |
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6 __metaclass__ = type |
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7 |
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8 #class MovingObject: |
2
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9 |
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10 class TimeInterval: |
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11 '''Temporal interval''' |
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12 def __init__(self, first=0, last=-1): |
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13 self.first=first |
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14 self.last=last |
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15 |
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16 def __str__(self): |
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17 return '%d %d'%(self.first, self.last) |
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18 |
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19 def empty(self): |
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20 ''' |
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21 >>> TimeInterval().empty() |
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22 True |
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23 >>> TimeInterval(0,1).empty() |
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24 False |
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25 ''' |
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26 return self.first > self.last |
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27 |
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28 def length(self): |
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29 '''Returns the length of the interval |
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30 |
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31 >>> TimeInterval(0,1).length() |
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32 2 |
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33 >>> TimeInterval(10,8).length() |
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34 0 |
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35 ''' |
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36 return max(0,self.last-self.first+1) |
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37 |
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38 def getList(self): |
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39 return [self.first, self.last] |
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40 |
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41 def contains(self, instant): |
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42 return (self.first<=instant and self.last>=instant) |
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43 |
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44 def inside(self, interval2): |
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45 'indicates if the temporal interval of self is comprised in interval2' |
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46 return (self.first >= interval2.first) and (self.last <= interval2.last) |
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47 |
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48 def union(self, interval2): |
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49 '''Largest interval comprising self and interval2''' |
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50 return TimeInterval(min(self.first, interval2.first), max(self.last, interval2.last)) |
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51 |
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52 def intersection(self, interval2): |
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53 '''Largest interval comprising self and interval2''' |
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54 return TimeInterval(max(self.first, interval2.first), min(self.last, interval2.last)) |
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55 |
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56 class STObject: |
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57 '''Class for spatio-temporal object |
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58 i.e. with temporal and spatial existence |
6 | 59 (time interval and bounding polygon for positions (e.g. rectangle)). |
60 It does not mean that the object is defined | |
61 for all time instants within the time interval''' | |
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62 |
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63 def __init__(self, timeInterval = TimeInterval(), boundingPolygon = None, num = None): |
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64 self.timeInterval = timeInterval |
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65 self.boundingPolygon = boundingPolygon |
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66 self.num = num |
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67 |
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68 def empty(self): |
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69 return self.timeInterval.empty() |
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70 |
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71 def getFirstInstant(self): |
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72 return self.timeInterval.first() |
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73 |
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74 def getLastInstant(self): |
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75 return self.timeInterval.first() |
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76 |
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77 |
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78 |
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79 # return bounding box, and generic polygon, that defaults to box |
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80 |
6 | 81 class Trajectory(STObject): |
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82 '''Class for trajectories |
6 | 83 i.e. a temporal sequence of positions''' |
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84 pass |
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85 |
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86 |
6 | 87 class TemporalIndicator: |
88 '''Class for temporal indicators | |
89 i.e. indicators that take a value at specific instants''' | |
90 pass | |
91 | |
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92 |
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93 if __name__ == "__main__": |
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94 import doctest |
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95 import unittest |
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96 #suite = doctest.DocFileSuite('tests/ubc_utils.txt') |
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97 suite = doctest.DocTestSuite() |
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98 unittest.TextTestRunner().run(suite) |
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99 #doctest.testmod() |
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100 #doctest.testfile("example.txt") |