/**
* Calculates the sun's azimuth at a given location and time
* @param Location azimuth at what location
* @param time azimuth at what time
* @param dec precalculated declination angle
* @return sun's azimuth
* @see http://www.providence.edu/mcs/rbg/java/sungraph.htm
*/
static Angle
CalculateAzimuth(const GeoPoint &Location, const BrokenTime &time,
const fixed time_zone, const Angle dec)
{
assert(time.Plausible());
fixed T = fixed(time.GetSecondOfDay()) / 3600 - fixed(12) + time_zone;
Angle t = Angle::Degrees(15) * T;
return -Angle::FromXY(Location.latitude.cos() * dec.sin() -
Location.latitude.sin() * dec.cos() * t.cos(),
dec.cos() * t.sin());
}
bool
IGCParseTime(const char *buffer, BrokenTime &time)
{
unsigned hour, minute, second;
if (sscanf(buffer, "%02u%02u%02u", &hour, &minute, &second) != 3)
return false;
time = BrokenTime(hour, minute, second);
return time.IsPlausible();
}
void
RASPSettingsPanel::UpdateTimeControl()
{
const DataFieldEnum &item = (const DataFieldEnum &)GetDataField(ITEM);
const int item_index = item.GetValue();
SetRowEnabled(TIME, item_index >= 0);
if (item_index >= 0) {
DataFieldEnum &time_df = (DataFieldEnum &)GetDataField(TIME);
time_df.ClearChoices();
time_df.addEnumText(_("Now"));
rasp->ForEachTime(item_index, [&time_df](BrokenTime t){
TCHAR timetext[10];
_stprintf(timetext, _T("%02u:%02u"), t.hour, t.minute);
time_df.addEnumText(timetext, t.GetMinuteOfDay());
});
if (time.IsPlausible())
time_df.Set(time.GetMinuteOfDay());
GetControl(TIME).RefreshDisplay();
}
}
static bool
ReadTime(NMEAInputLine &line, BrokenTime &time)
{
char buffer[10];
line.Read(buffer, sizeof(buffer));
char *p = buffer, *endptr;
time.hour = strtoul(p, &endptr, 10);
if (endptr == p || *endptr != ':')
return false;
p = endptr + 1;
time.minute = strtoul(p, &endptr, 10);
if (endptr == p || *endptr != ':')
return false;
p = endptr + 1;
time.second = strtoul(p, &endptr, 10);
if (endptr == p || *endptr != 0)
return false;
return time.IsPlausible();
}
bool
FlytecDevice::DownloadFlight(const RecordedFlightInfo &flight,
Path path, OperationEnvironment &env)
{
port.StopRxThread();
PeriodClock status_clock;
status_clock.Update();
// Request flight record
char buffer[256];
sprintf(buffer, "$PBRTR,%02d", flight.internal.flytec);
AppendNMEAChecksum(buffer);
strcat(buffer, "\r\n");
port.Write(buffer);
if (!ExpectXOff(port, env, 1000))
return false;
// Open file writer
FileHandle writer(path, _T("wb"));
if (!writer.IsOpen())
return false;
unsigned start_sec = flight.start_time.GetSecondOfDay();
unsigned end_sec = flight.end_time.GetSecondOfDay();
if (end_sec < start_sec)
end_sec += 24 * 60 * 60;
unsigned range = end_sec - start_sec;
env.SetProgressRange(range);
while (true) {
// Check if the user cancelled the operation
if (env.IsCancelled())
return false;
// Receive the next line
if (!ReceiveLine(port, buffer, ARRAY_SIZE(buffer), 1000))
return false;
// XON was received
if (StringIsEmpty(buffer))
break;
if (status_clock.CheckUpdate(250) &&
*buffer == 'B') {
// Parse the fix time
BrokenTime time;
if (IGCParseTime(buffer + 1, time)) {
unsigned time_sec = time.GetSecondOfDay();
if (time_sec < start_sec)
time_sec += 24 * 60 * 60;
if (time_sec > end_sec + 5 * 60)
time_sec = start_sec;
unsigned position = time_sec - start_sec;
if (position > range)
position = range;
env.SetProgressPosition(position);
}
}
// Write line to the file
writer.Write(buffer);
}
return true;
}
bool IsDefined() const {
return time.IsPlausible();
}
