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annotate python/ubc_utils.py @ 47:e27598865af3

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modified loadtrajectories to load objects and prototypes
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Thu, 23 Sep 2010 17:12:09 -0400
parents be3ae926e4e8
children 8aed225f71d8
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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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3
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4 import utils
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5 from moving import MovingObject, TimeInterval, Trajectory
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6
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7 __metaclass__ = type
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8
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9 delimiterChar = '%';
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10
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11 def getFileType(s):
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12 filePrefix = utils.removeExtension(s)
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13 i = filePrefix.rfind('-')
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14 if i>0:
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15 return filePrefix[i+1:]
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16 else:
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17 return ''
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18
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19 def getLines(f):
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20 '''Gets a complete entry (all the lines) in between delimiterChar.'''
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21 dataStrings = []
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22 s = utils.readline(f)
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23 while (len(s) > 0) and (not s.startswith(delimiterChar)):
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24 dataStrings += [s.strip()]
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25 s = utils.readline(f)
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26 return dataStrings
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27
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28 def saveTrajectorieUserTypes(inFilename, outFilename, objects):
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29 '''The program saves the objects,
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30 by just copying the corresponding trajectory and velocity data
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31 from the inFilename, and saving the characteristics in objects (first line)
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32 into outFilename'''
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33 infile = utils.openCheck(inFilename)
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34 outfile = utils.openCheck(outFilename)
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35
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36 if (not infile) | (not outfile):
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37 return
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38
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39 lines = getLines(file)
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40 objNum = 0
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41 while lines != []:
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42 i = 0
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43 while (i<len(objects)) and (objects[i].num != objNum):
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44 i+=1
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45 if i<len(objects):
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46 l = lines[0].split(' ')
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47 outfile.write()
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48 # next object
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49 objNum += 1
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50
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51 def loadTrajectories(filename, nObjects = -1):
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52 '''Loads trajectories'''
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53
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54 file = utils.openCheck(filename)
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55 if (not file):
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56 return []
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57
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58 objects = []
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59 objNum = 0
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60 objectType = getFileType(filename)
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61 lines = getLines(file)
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62 while (lines != []) and ((nObjects<0) or (objNum<nObjects)):
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63 l = lines[0].split(' ')
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64 parsedLine = [int(n) for n in l[:4]]
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65 obj = MovingObject(num = objNum, timeInterval = TimeInterval(parsedLine[1],parsedLine[2]))
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66 #add = True
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67 if len(lines) >= 3:
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68 obj.positions = Trajectory.load(lines[1], lines[2])
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69 if len(lines) >= 5:
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70 obj.velocities = Trajectory.load(lines[3], lines[4])
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71 if objectType == 'objects':
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72 obj.userType = parsedLine[3]
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73 obj.nObjects = float(l[4])
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74 obj.featureNumbers = [int(n) for n in l[5:]]
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75
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76 # load contour data if available
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77 if len(lines) >= 6:
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78 obj.contourType = utils.line2Floats(lines[6])
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79 obj.contourOrigins = Trajectory.load(lines[7], lines[8])
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80 obj.contourSizes = Trajectory.load(lines[9], lines[10])
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81 elif objectType == 'prototypes':
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82 obj.userType = parsedLine[3]
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83 obj.nMatchings = int(l[4])
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84
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85 if len(lines) != 2:
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86 objects.append(obj)
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87 objNum+=1
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88 else:
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89 print("Error two lines of data for feature %d"%(f.num))
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90
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91 lines = getLines(file)
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92
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93 file.close()
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94 return objects
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95
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96 def loadCollisionPoints(filename, nPoints = -1):
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97 '''Loads collision points and returns a dict
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98 with keys as a pair of the numbers of the two interacting objects'''
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99 file = utils.openCheck(filename)
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100 if (not file):
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101 return []
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102
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103 points = {}
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104 num = 0
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105 lines = getLines(file)
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106 while (lines != []) and ((nPoints<0) or (num<nPoints)):
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107 parsedLine = [int(n) for n in lines[0].split(' ')]
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108 protagonistNums = (parsedLine[0], parsedLine[1])
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109 points[protagonistNums] = [[float(n) for n in lines[1].split(' ')],
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110 [float(n) for n in lines[2].split(' ')]]
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111
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112 num+=1
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113 lines = getLines(file)
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114
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115 file.close()
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116 return points