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GPWS: change default source to match all FDMs

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Provide another built-in altitude source to hook a radio-altimeter instrument
This commit is contained in:
ThorstenB 2010-12-01 22:57:35 +01:00
parent 02efa3c8ea
commit 7a2e1be5bf
2 changed files with 16 additions and 9 deletions
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18
src/Instrumentation/mk_viii.cxx
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@ -187,6 +187,7 @@ MK_VIII::PropertiesHandler::init ()
mk_node(altitude) = fgGetNode("/position/altitude-ft", true);
mk_node(altitude_agl) = fgGetNode("/position/altitude-agl-ft", true);
mk_node(altitude_gear_agl) = fgGetNode("/position/gear-agl-ft", true);
mk_node(altitude_radar_agl) = fgGetNode("/instrumentation/radar-altimeter/radar-altitude-ft", true);
mk_node(orientation_roll) = fgGetNode("/orientation/roll-deg", true);
mk_node(asi_serviceable) = fgGetNode("/instrumentation/airspeed-indicator/serviceable", true);
mk_node(asi_speed) = fgGetNode("/instrumentation/airspeed-indicator/indicated-speed-kt", true);
@ -719,10 +720,7 @@ MK_VIII::ConfigurationModule::read_options_select_group_1 (int value)
bool
MK_VIII::ConfigurationModule::read_radio_altitude_input_select (int value)
{
if (value >= 0 && value <= 2)
mk->io_handler.conf.use_gear_altitude = true;
else
mk->io_handler.conf.use_gear_altitude = false;
mk->io_handler.conf.altitude_source = value;
return (value >= 0 && value <= 4) || (value >= 251 && value <= 255);
}
@ -1167,10 +1165,18 @@ MK_VIII::IOHandler::update_inputs ()
if (mk_ainput_feed(radio_altitude))
{
double agl;
if (conf.use_gear_altitude)
switch (conf.altitude_source)
{
case 3:
agl = mk_node(altitude_gear_agl)->getDoubleValue();
else
break;
case 4:
agl = mk_node(altitude_radar_agl)->getDoubleValue();
break;
default: // 0,1,2 (and any currently unsupported values)
agl = mk_node(altitude_agl)->getDoubleValue();
break;
}
// Some flight models may return negative values when on the
// ground or after a crash; do not allow them.
mk_ainput(radio_altitude).set(SG_MAX2(0.0, agl));

3
src/Instrumentation/mk_viii.hxx
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@ -201,6 +201,7 @@ class MK_VIII : public SGSubsystem
SGPropertyNode_ptr altitude;
SGPropertyNode_ptr altitude_agl;
SGPropertyNode_ptr altitude_gear_agl;
SGPropertyNode_ptr altitude_radar_agl;
SGPropertyNode_ptr orientation_roll;
SGPropertyNode_ptr asi_serviceable;
SGPropertyNode_ptr asi_speed;
@ -481,7 +482,7 @@ public:
bool alternate_steep_approach;
bool use_internal_gps;
bool localizer_enabled;
bool use_gear_altitude;
int altitude_source;
bool use_attitude_indicator;
} conf;