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Extended test case for CPR calculator to use different odd/even locations

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This commit is contained in:
Nick Foster 2012-06-20 18:57:01 -07:00
parent b29d049d7d
commit 0494eb5b18
1 changed files with 16 additions and 9 deletions
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25
python/cpr.py
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@ -274,12 +274,14 @@ if __name__ == '__main__':
for i in range(0, rounds):
decoder = cpr_decoder(None)
ac_lat = random.uniform(-85, 85)
ac_lon = random.uniform(-180,180)
even_lat = random.uniform(-85, 85)
even_lon = random.uniform(-180,180)
odd_lat = even_lat + 1e-2
odd_lon = min(even_lon + 1e-2, 180)
#encode that position
(evenenclat, evenenclon) = cpr_encode(ac_lat, ac_lon, False, False)
(oddenclat, oddenclon) = cpr_encode(ac_lat, ac_lon, True, False)
(evenenclat, evenenclon) = cpr_encode(even_lat, even_lon, False, False)
(oddenclat, oddenclon) = cpr_encode(odd_lat, odd_lon, True, False)
#perform a global decode
icao = random.randint(0, 0xffffff)
@ -300,17 +302,22 @@ if __name__ == '__main__':
#print "Lat: %f Lon: %f" % (ac_lat, ac_lon)
if abs(odddeclat - ac_lat) > threshold or abs(odddeclon - ac_lon) > threshold:
#print "odddeclat: %f ac_lat: %f" % (odddeclat, ac_lat)
#print "odddeclon: %f ac_lon: %f" % (odddeclon, ac_lon)
if abs(odddeclat - odd_lat) > threshold or abs(odddeclon - odd_lon) > threshold:
print "odddeclat: %f odd_lat: %f" % (odddeclat, odd_lat)
print "odddeclon: %f odd_lon: %f" % (odddeclon, odd_lon)
raise Exception("CPR test failure: global decode error greater than threshold")
nexteven_lat = odd_lat + 1e-2
nexteven_lon = min(odd_lon + 1e-2, 180)
(nexteven_enclat, nexteven_enclon) = cpr_encode(nexteven_lat, nexteven_lon, False, False)
try:
(evendeclat, evendeclon) = cpr_resolve_local([ac_lat, ac_lon], [evenenclat, evenenclon], False, False)
(evendeclat, evendeclon) = cpr_resolve_local([even_lat, even_lon], [nexteven_enclat, nexteven_enclon], False, False)
except CPRNoPositionError:
raise Exception("CPR test failure: local decode failure to resolve")
if abs(evendeclat - ac_lat) > threshold or abs(evendeclon - ac_lon) > threshold:
if abs(evendeclat - nexteven_lat) > threshold or abs(evendeclon - nexteven_lon) > threshold:
raise Exception("CPR test failure: local decode error greater than threshold")
print "CPR test successful. There were %i boundary straddles over %i rounds." % (bs, rounds)