Source code for pyspatiotemporalgeom.examples.gen

#    Copyright (c) 2014 Mark McKenney
#
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#    The above copyright notice and this permission notice shall be included in
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import pyspatiotemporalgeom.region as region
import struct
import sys


def generateRegionAndWriteHexToFile():
  '''
  Sample function showing how to generate a random region 
  and write it in hexadecimal format to a text file (for portability)
  '''
  if len( sys.argv ) < 5:
      print 'usage: ', sys.argv[0],'  numStartSegs minBound maxBound outputHexFile'
      exit()
  if len( sys.argv ) >= 5:
      num = int( sys.argv[1] )
      minBound = int( sys.argv[2] )
      maxBound = int( sys.argv[3] )
      outfileName = sys.argv[4]
      outfile = open(outfileName, 'w' )
  r1 = region.getRandomRegion( num, minBound, maxBound )
  print 'writing file'
  #write it out
  for h in r1:
      if h[0][0] < h[0][1]:
          seg = h[0]
          s=struct.pack('>d', seg[0][0] )
          hexx1 = ''.join('%.2x' % ord(c) for c in s) # get hex vals from bin string s
          s=struct.pack('>d', seg[0][1])
          hexy1 = ''.join('%.2x' % ord(c) for c in s) # get hex vals from bin string s
          s=struct.pack('>d', seg[1][0])
          hexx2 = ''.join('%.2x' % ord(c) for c in s) # get hex vals from bin string s
          s=struct.pack('>d', seg[1][1])
          hexy2 = ''.join('%.2x' % ord(c) for c in s) # get hex vals from bin string s
           #output the line to the new file
          la = h[1]
          if la < 0:
              la = 0
          if la > 0:
              la = 1
          lb = h[2]
          if lb < 0:
              lb = 0
          if lb > 0:
              lb = 1
          outfile.write( hexx1 + ' ' + hexy1 + ' '+  hexx2 + ' ' + hexy2+' ' + str(la) +' '+str(lb)+ '\n')
  outfile.close()
  print len( r1 )/2

if __name__ == '__main__':
  generateRegionAndWriteHexToFile()