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-rwxr-xr-xblue.py159
1 files changed, 148 insertions, 11 deletions
diff --git a/blue.py b/blue.py
index 3a6fb07..967b3a7 100755
--- a/blue.py
+++ b/blue.py
@@ -8,27 +8,34 @@ import solar_python as sol
loc = None
stop_date = None
human = False
+unix = False
+local = False
noon = False
+night = False
blue = False
gold = False
unblue = False
ungold = False
morning = []
evening = []
-deriv = []
+dderiv = []
+nderiv = []
+res = '1s'
## Parse command line
argv0 = sys.argv[0] if len(sys.argv) > 0 else 'blue'
def usage():
- opts = '[-e elev]* [-m elev]* [-d delev]* [-l lat:lon | -l loc] [-s year-month-day | -s -] [-bBgGhn]'
+ opts = '[-d delev]* [-D delev]* [-e elev]* [-m elev]* [-h [-L] | -u | -L]'
+ opts += ' [-l lat:lon | -l loc] [-s year-month-day | -s -] [-r num[h|m|s]]'
+ opts += ' [-bBgGnN]'
print('Usage: %s %s' % (argv0, opts), file = sys.stderr)
sys.exit(1)
i, n = 1, len(sys.argv)
def getarg():
global i, j, n, m
if j < m:
- rc = arg[j]
+ rc = arg[j:]
j = m
return rc
else:
@@ -42,13 +49,15 @@ while i < n:
if arg == '--':
i += 1
break
- elif arg.startwith('-'):
+ elif arg.startswith('-'):
j, m = 1, len(arg)
while j < m:
c = arg[j]
j += 1
if c == 'd':
- deriv.append(getarg())
+ dderiv.append(getarg())
+ elif c == 'D':
+ nderiv.append(getarg())
elif c == 'e':
evening.append(getarg())
elif c == 'm':
@@ -57,6 +66,8 @@ while i < n:
loc = getarg()
elif c == 's':
stop_date = getarg()
+ elif c == 'r':
+ res = getarg()
elif c == 'b':
blue = True
elif c == 'B':
@@ -67,15 +78,34 @@ while i < n:
ungold = True
elif c == 'h':
human = True
+ elif c == 'u':
+ unix = True
+ elif c == 'L':
+ local = True
elif c == 'n':
noon = True
+ elif c == 'N':
+ night = True
else:
usage()
- j += 1
i += 1
else:
break
-if i != n:
+if i != n or (human and unix):
+ usage()
+
+
+## Parse resolution
+if len(res) < 2:
+ usage()
+mul = {'s' : 1.0, 'm' : 60.0, 'h' : 60 * 60.0}
+suffix = res[-1]
+value = res[:-1]
+if '.' in value:
+ usage()
+try:
+ res = int(value) * mul[suffix]
+except:
usage()
@@ -83,7 +113,8 @@ if i != n:
try:
evening = [float(e) for e in evening]
morning = [float(e) for e in morning]
- deriv = [float(e) for e in deriv]
+ dderiv = [float(e) for e in dderiv]
+ nderiv = [float(e) for e in nderiv]
for e in evening + morning:
if abs(e) > 90:
usage()
@@ -91,7 +122,7 @@ except:
usage()
-## Parse -bBgGn
+## Parse -bBgGnN
if blue:
morning.append(sol.SOLAR_ELEVATION_RANGE_BLUE_HOUR[0])
evening.append(sol.SOLAR_ELEVATION_RANGE_BLUE_HOUR[1])
@@ -105,11 +136,13 @@ if ungold:
morning.append(sol.SOLAR_ELEVATION_RANGE_GOLDEN_HOUR[1])
evening.append(sol.SOLAR_ELEVATION_RANGE_GOLDEN_HOUR[0])
if noon:
- deriv.append(0.0)
+ dderiv.append(0.0)
+if night:
+ nderiv.append(0.0)
## Fallback options
-if len(morning) == 0 and len(evening) == 0 and len(deriv) == 0:
+if len(morning) == 0 and len(evening) == 0 and len(dderiv) == 0 and len(nderiv) == 0:
morning.append(sol.SOLAR_ELEVATION_RANGE_BLUE_HOUR[0])
evening.append(sol.SOLAR_ELEVATION_RANGE_BLUE_HOUR[1])
@@ -204,3 +237,107 @@ else:
stop_time += 24 * 60 * 60
stop_time -= (time.altzone if is_summer else time.timezone)
+
+def get_elev(elev, start, morning):
+ end = start + 0.0099
+ while start < end:
+ rc = sol.future_elevation(lat, lon, elev, start)
+ if rc is None:
+ return (None, end)
+ else:
+ start = rc + 1e-06
+ d = sol.solar_elevation(lat, lon, rc + 3e-09)
+ d -= sol.solar_elevation(lat, lon, rc)
+ if d >= 0 if morning else d <= 0:
+ return (sol.julian_centuries_to_epoch(rc), start)
+ return (None, end)
+
+def get_deriv(delev, start, daytime):
+ end = start + 0.0099
+ while start < end:
+ rc = sol.future_elevation_derivative(lat, lon, delev, start)
+ if rc is None:
+ return (None, end)
+ else:
+ start = rc + 1e-06
+ elev = sol.solar_elevation(lat, lon, rc)
+ if elev >= 0 if daytime else elev <= 0:
+ return (sol.julian_centuries_to_epoch(rc), start)
+ return (None, end)
+
+def get_morning(elev, start):
+ return get_elev(elev, start, True)
+
+def get_evening(elev, start):
+ return get_elev(elev, start, False)
+
+def get_day(delev, start):
+ return get_deriv(delev, start, True)
+
+def get_night(delev, start):
+ return get_deriv(delev, start, False)
+
+now = sol.epoch_to_julian_centuries(time.time())
+class State:
+ def __init__(self, val, fun):
+ self.start = now
+ self.val = val
+ self.fun = fun
+ def next(self):
+ (rc, self.start) = self.fun(self.val, self.start)
+ return (rc, self.start)
+
+morning = [State(v, get_morning) for v in morning]
+evening = [State(v, get_evening) for v in evening]
+dderiv = [State(v, get_day) for v in dderiv]
+nderiv = [State(v, get_night) for v in nderiv]
+states = morning + evening + dderiv + nderiv
+
+
+# So we can stop of the pipe breaks (useful with -s -)
+def print(msg):
+ msg = (str(msg) + '\n').encode('utf-8')
+ ptr, n = 0, len(msg)
+ while ptr < n:
+ ptr += os.write(1, msg[ptr:])
+
+def parse_time(t, localtime, tzname):
+ tm = time.localtime(t) if localtime else time.gmtime(t)
+ if localtime and tm.tm_isdst < 0:
+ tm = time.gmtime(t)
+ localtime = False
+ if not localtime:
+ tz = 'UTC' if tzname else 'Z'
+ else:
+ tz = time.strftime('%Z' if tzname else '%z', tm)
+ return (tm.tm_year, tm.tm_mon, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec, tz)
+
+jc_stop_time = sol.epoch_to_julian_centuries(stop_time) if stop_time is not None else None
+months = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec')
+try:
+ while len(states) > 0:
+ n = len(states)
+ i = 0
+ while i < n:
+ (t, s) = states[i].next()
+ if t is not None and (stop_time is None or t < stop_time):
+ t = int(t / res + 0.5) * res
+ if unix:
+ print(int(t))
+ else:
+ t = parse_time(t, local, human)
+ if human:
+ (y, m, d, H, M, S, z) = t
+ t = (y, m, months[m - 1], d, H, M, S, z)
+ print('%i-(%02i)%s-%02i %02i:%02i:%02i %s' % t)
+ else:
+ print('%i-%02i-%02iT%02i:%02i:%02i%s' % t)
+ if jc_stop_time is not None and s >= jc_stop_time:
+ del states[i]
+ n -= 1
+ else:
+ i += 1
+except KeyboardInterrupt as e:
+ sys.exit(0)
+except BrokenPipeError as e:
+ sys.exit(0)