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Cache some property values locally to reduce unnecessary property system

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calls.
This commit is contained in:
curt 2005-12-28 19:11:30 +00:00
parent ccddc99e73
commit ce08000a96
2 changed files with 79 additions and 81 deletions
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153
src/Instrumentation/navradio.cxx
View file

@ -77,7 +77,7 @@ FGNavRadio::FGNavRadio(SGPropertyNode *node) :
gs_deflection_node(NULL),
gs_rate_of_climb_node(NULL),
gs_dist_node(NULL),
id_node(NULL),
nav_id_node(NULL),
id_c1_node(NULL),
id_c2_node(NULL),
id_c3_node(NULL),
@ -86,10 +86,11 @@ FGNavRadio::FGNavRadio(SGPropertyNode *node) :
gps_cdi_deflection_node(NULL),
gps_to_flag_node(NULL),
gps_from_flag_node(NULL),
last_id(""),
last_nav_id(""),
last_nav_vor(false),
play_count(0),
last_time(0),
radial(0.0),
target_radial(0.0),
horiz_vel(0.0),
last_x(0.0),
@ -196,7 +197,7 @@ FGNavRadio::init ()
gs_deflection_node = node->getChild("gs-needle-deflection", 0, true);
gs_rate_of_climb_node = node->getChild("gs-rate-of-climb", 0, true);
gs_dist_node = node->getChild("gs-distance", 0, true);
id_node = node->getChild("nav-id", 0, true);
nav_id_node = node->getChild("nav-id", 0, true);
id_c1_node = node->getChild("nav-id_asc1", 0, true);
id_c2_node = node->getChild("nav-id_asc2", 0, true);
id_c3_node = node->getChild("nav-id_asc3", 0, true);
@ -302,9 +303,18 @@ double FGNavRadio::adjustILSRange( double stationElev, double aircraftElev,
void
FGNavRadio::update(double dt)
{
// cache values locally for speed
double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
bool power_btn = power_btn_node->getBoolValue();
bool nav_serviceable = nav_serviceable_node->getBoolValue();
bool cdi_serviceable = cdi_serviceable_node->getBoolValue();
bool tofrom_serviceable = tofrom_serviceable_node->getBoolValue();
bool inrange = inrange_node->getBoolValue();
bool has_gs = has_gs_node->getBoolValue();
bool is_loc = loc_node->getBoolValue();
double loc_dist = loc_dist_node->getDoubleValue();
// SGPropertyNode *node = fgGetNode(branch.c_str(), num, true );
@ -331,21 +341,21 @@ FGNavRadio::update(double dt)
////////////////////////////////////////////////////////////////////////
// cout << "is_valid = " << is_valid
// << " power_btn = " << power_btn_node->getBoolValue()
// << " power_btn = " << power_btn
// << " bus_power = " << bus_power_node->getDoubleValue()
// << " nav_serviceable = " << nav_serviceable->getBoolValue()
// << " nav_serviceable = " << nav_serviceable
// << endl;
if ( is_valid && power_btn_node->getBoolValue()
if ( is_valid && power_btn
&& (bus_power_node->getDoubleValue() > 1.0)
&& nav_serviceable_node->getBoolValue() )
&& nav_serviceable )
{
station = Point3D( nav_x, nav_y, nav_z );
loc_dist_node->setDoubleValue( aircraft.distance3D( station ) );
// cout << "station = " << station << " dist = "
// << loc_dist_node->getDoubleValue() << endl;
loc_dist = aircraft.distance3D( station );
loc_dist_node->setDoubleValue( loc_dist );
// cout << "station = " << station << " dist = " << loc_dist << endl;
if ( has_gs_node->getBoolValue() ) {
if ( has_gs ) {
// find closest distance to the gs base line
sgdVec3 p;
sgdSetVec3( p, aircraft.x(), aircraft.y(), aircraft.z() );
@ -392,7 +402,7 @@ FGNavRadio::update(double dt)
&hdg, &az2, &s );
// cout << "az1 = " << az1 << " magvar = " << nav_magvar << endl;
heading_node->setDoubleValue( hdg );
double radial = az2 - twist;
radial = az2 - twist;
double recip = radial + 180.0;
if ( recip >= 360.0 ) { recip -= 360.0; }
radial_node->setDoubleValue( radial );
@ -400,44 +410,39 @@ FGNavRadio::update(double dt)
// cout << " heading = " << heading_node->getDoubleValue()
// << " dist = " << nav_dist << endl;
if ( loc_node->getBoolValue() ) {
if ( is_loc ) {
double offset = radial - target_radial;
while ( offset < -180.0 ) { offset += 360.0; }
while ( offset > 180.0 ) { offset -= 360.0; }
// cout << "ils offset = " << offset << endl;
effective_range
= adjustILSRange( nav_elev, elev, offset,
loc_dist_node->getDoubleValue()
* SG_METER_TO_NM );
loc_dist * SG_METER_TO_NM );
} else {
effective_range = adjustNavRange( nav_elev, elev, range );
}
// cout << "nav range = " << effective_range
// << " (" << range << ")" << endl;
if ( loc_dist_node->getDoubleValue()
< effective_range * SG_NM_TO_METER )
{
inrange_node->setBoolValue( true );
} else if ( loc_dist_node->getDoubleValue()
< 2 * effective_range * SG_NM_TO_METER )
{
inrange_node->setBoolValue( sg_random() <
( 2 * effective_range * SG_NM_TO_METER
- loc_dist_node->getDoubleValue() ) /
(effective_range * SG_NM_TO_METER) );
if ( loc_dist < effective_range * SG_NM_TO_METER ) {
inrange = true;
} else if ( loc_dist < 2 * effective_range * SG_NM_TO_METER ) {
inrange = sg_random() < ( 2 * effective_range * SG_NM_TO_METER
- loc_dist )
/ (effective_range * SG_NM_TO_METER);
} else {
inrange_node->setBoolValue( false );
inrange = false;
}
inrange_node->setBoolValue( inrange );
if ( !loc_node->getBoolValue() ) {
if ( !is_loc ) {
target_radial = sel_radial_node->getDoubleValue();
}
// Calculate some values for the nav/ils hold autopilot
double cur_radial = recip;
if ( loc_node->getBoolValue() ) {
if ( is_loc ) {
// ILS localizers radials are already "true" in our
// database
} else {
@ -452,7 +457,7 @@ FGNavRadio::update(double dt)
// determine the target radial in "true" heading
double trtrue = 0.0;
if ( loc_node->getBoolValue() ) {
if ( is_loc ) {
// ILS localizers radials are already "true" in our
// database
trtrue = target_radial;
@ -465,6 +470,9 @@ FGNavRadio::update(double dt)
while ( trtrue > 360.0 ) { trtrue -= 360.0; }
target_radial_true_node->setDoubleValue( trtrue );
// FIXME: this smells odd, there must be a better (or more
// linear) solution
//
// determine the heading adjustment needed.
// over 8km scale by 3.0
// (3 is chosen because max deflection is 10
@ -473,7 +481,7 @@ FGNavRadio::update(double dt)
// because the overstated error helps drive it to the radial in a
// moderate cross wind.
double adjustment = 0.0;
if (loc_dist_node->getDoubleValue() > 8000) {
if ( loc_dist > 8000 ) {
adjustment = cdi_deflection_node->getDoubleValue() * 3.0;
} else {
adjustment = cdi_deflection_node->getDoubleValue() * 10.0;
@ -526,14 +534,11 @@ FGNavRadio::update(double dt)
// compute to/from flag status
double value = false;
double offset = fabs(radial_node->getDoubleValue() - target_radial);
double offset = fabs(radial - target_radial);
if ( nav_slaved_to_gps_node->getBoolValue() ) {
value = gps_to_flag_node->getBoolValue();
} else if ( inrange_node->getBoolValue()
&& nav_serviceable_node->getBoolValue()
&& tofrom_serviceable_node->getBoolValue() )
{
if ( loc_node->getBoolValue() ) {
} else if ( inrange && nav_serviceable && tofrom_serviceable ) {
if ( is_loc ) {
value = true;
} else {
value = !(offset <= 90.0 || offset >= 270.0);
@ -544,11 +549,8 @@ FGNavRadio::update(double dt)
value = false;
if ( nav_slaved_to_gps_node->getBoolValue() ) {
value = gps_from_flag_node->getBoolValue();
} else if ( inrange_node->getBoolValue()
&& nav_serviceable_node->getBoolValue()
&& tofrom_serviceable_node->getBoolValue() )
{
if ( loc_node->getBoolValue() ) {
} else if ( inrange && nav_serviceable && tofrom_serviceable ) {
if ( is_loc ) {
value = false;
} else {
value = !(offset > 90.0 && offset < 270.0);
@ -564,14 +566,10 @@ FGNavRadio::update(double dt)
// We want +- 5 dots deflection for the gps, so clamp to -12.5/12.5
if ( r < -12.5 ) { r = -12.5; }
if ( r > 12.5 ) { r = 12.5; }
} else if ( inrange_node->getBoolValue()
&& nav_serviceable_node->getBoolValue()
&& cdi_serviceable_node->getBoolValue() )
{
r = radial_node->getDoubleValue() - target_radial;
} else if ( inrange && nav_serviceable && cdi_serviceable ) {
r = radial - target_radial;
// cout << "Target radial = " << target_radial
// << " Actual radial = " << radial_node->getDoubleValue()
// << endl;
// << " Actual radial = " << radial << endl;
while ( r > 180.0 ) { r -= 360.0;}
while ( r < -180.0 ) { r += 360.0;}
@ -581,7 +579,7 @@ FGNavRadio::update(double dt)
// According to Robin Peel, the ILS is 4x more sensitive than a vor
r = -r; // reverse, since radial is outbound
if ( loc_node->getBoolValue() ) { r *= 4.0; }
if ( is_loc ) { r *= 4.0; }
if ( r < -10.0 ) { r = -10.0; }
if ( r > 10.0 ) { r = 10.0; }
} else {
@ -591,13 +589,10 @@ FGNavRadio::update(double dt)
// compute the amount of cross track distance error in meters
double m = 0.0;
if ( inrange_node->getBoolValue()
&& nav_serviceable_node->getBoolValue()
&& cdi_serviceable_node->getBoolValue() )
{
r = radial_node->getDoubleValue() - target_radial;
if ( inrange && nav_serviceable && cdi_serviceable ) {
r = radial - target_radial;
// cout << "Target radial = " << target_radial
// << " Actual radial = " << radial_node->getDoubleValue()
// << " Actual radial = " << radial
// << " r = " << r << endl;
while ( r > 180.0 ) { r -= 360.0;}
@ -608,7 +603,7 @@ FGNavRadio::update(double dt)
r = -r; // reverse, since radial is outbound
m = loc_dist_node->getDoubleValue() * sin(r * SGD_DEGREES_TO_RADIANS);
m = loc_dist * sin(r * SGD_DEGREES_TO_RADIANS);
} else {
m = 0.0;
@ -620,9 +615,8 @@ FGNavRadio::update(double dt)
r = 0.0;
if ( nav_slaved_to_gps_node->getBoolValue() ) {
// FIXME, what should be set here?
} else if ( inrange_node->getBoolValue() && has_gs_node->getBoolValue()
&& nav_serviceable_node->getBoolValue()
&& gs_serviceable_node->getBoolValue() )
} else if ( inrange && nav_serviceable
&& has_gs && gs_serviceable_node->getBoolValue() )
{
double x = gs_dist_node->getDoubleValue();
double y = (fgGetDouble("/position/altitude-ft") - nav_elev)
@ -634,13 +628,10 @@ FGNavRadio::update(double dt)
gs_deflection_node->setDoubleValue( r );
// audio effects
if ( is_valid
&& inrange_node->getBoolValue()
&& nav_serviceable_node->getBoolValue() )
{
if ( is_valid && inrange && nav_serviceable ) {
// play station ident via audio system if on + ident,
// otherwise turn it off
if ( power_btn_node->getBoolValue()
if ( power_btn
&& (bus_power_node->getDoubleValue() > 1.0)
&& ident_btn_node->getBoolValue()
&& audio_btn_node->getBoolValue() )
@ -704,6 +695,7 @@ void FGNavRadio::search()
// reset search time
_time_before_search_sec = 1.0;
// cache values locally for speed
double lon = lon_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
double lat = lat_node->getDoubleValue() * SGD_DEGREES_TO_RADIANS;
double elev = alt_node->getDoubleValue() * SG_FEET_TO_METER;
@ -725,11 +717,14 @@ void FGNavRadio::search()
gs = globals->get_gslist()->findByFreq(freq, lon, lat, elev);
}
string nav_id = "";
if ( loc != NULL ) {
id_node->setStringValue( loc->get_ident() );
// cout << "localizer = " << id_node->getStringValue() << endl;
nav_id = loc->get_ident();
nav_id_node->setStringValue( nav_id.c_str() );
// cout << "localizer = " << nav_id_node->getStringValue() << endl;
is_valid = true;
if ( last_id != id_node->getStringValue() || last_nav_vor ) {
if ( last_nav_id != nav_id || last_nav_vor ) {
trans_ident = loc->get_trans_ident();
target_radial = loc->get_multiuse();
while ( target_radial < 0.0 ) { target_radial += 360.0; }
@ -739,12 +734,12 @@ void FGNavRadio::search()
nav_x = loc->get_x();
nav_y = loc->get_y();
nav_z = loc->get_z();
last_id = id_node->getStringValue();
last_nav_id = nav_id;
last_nav_vor = false;
loc_node->setBoolValue( true );
has_dme = (dme != NULL);
has_gs_node->setBoolValue( gs != NULL );
if ( has_gs_node->getBoolValue() ) {
if ( gs != NULL ) {
has_gs_node->setBoolValue( true );
gs_lon = gs->get_lon();
gs_lat = gs->get_lat();
nav_elev = gs->get_elev_ft();
@ -777,6 +772,7 @@ void FGNavRadio::search()
// cout << gs_base_vec[0] << "," << gs_base_vec[1] << ","
// << gs_base_vec[2] << endl;
} else {
has_gs_node->setBoolValue( false );
nav_elev = loc->get_elev_ft();
}
twist = 0;
@ -812,11 +808,12 @@ void FGNavRadio::search()
// cout << " id = " << loc->get_locident() << endl;
}
} else if ( nav != NULL ) {
id_node->setStringValue( nav->get_ident() );
// cout << "nav = " << id_node->getStringValue() << endl;
nav_id = nav->get_ident();
nav_id_node->setStringValue( nav_id.c_str() );
// cout << "nav = " << nav_id << endl;
is_valid = true;
if ( last_id != id_node->getStringValue() || !last_nav_vor ) {
last_id = id_node->getStringValue();
if ( last_nav_id != nav_id || !last_nav_vor ) {
last_nav_id = nav_id;
last_nav_vor = true;
trans_ident = nav->get_trans_ident();
loc_node->setBoolValue( false );
@ -866,10 +863,10 @@ void FGNavRadio::search()
}
} else {
is_valid = false;
id_node->setStringValue( "" );
nav_id_node->setStringValue( "" );
target_radial = 0;
trans_ident = "";
last_id = "";
last_nav_id = "";
if ( ! globals->get_soundmgr()->remove( nav_fx_name ) ) {
SG_LOG(SG_COCKPIT, SG_WARN, "Failed to remove nav-vor-ident sound");
}
@ -878,7 +875,7 @@ void FGNavRadio::search()
}
char tmpid[5];
strncpy( tmpid, id_node->getStringValue(), 5 );
strncpy( tmpid, nav_id.c_str(), 5 );
id_c1_node->setIntValue( (int)tmpid[0] );
id_c2_node->setIntValue( (int)tmpid[1] );
id_c3_node->setIntValue( (int)tmpid[2] );

5
src/Instrumentation/navradio.hxx
View file

@ -86,7 +86,7 @@ class FGNavRadio : public SGSubsystem
SGPropertyNode *gs_deflection_node;
SGPropertyNode *gs_rate_of_climb_node;
SGPropertyNode *gs_dist_node;
SGPropertyNode *id_node;
SGPropertyNode *nav_id_node;
SGPropertyNode *id_c1_node;
SGPropertyNode *id_c2_node;
SGPropertyNode *id_c3_node;
@ -100,7 +100,7 @@ class FGNavRadio : public SGSubsystem
// internal (private) values
string last_id;
string last_nav_id;
bool last_nav_vor;
int play_count;
time_t last_time;
@ -112,6 +112,7 @@ class FGNavRadio : public SGSubsystem
string trans_ident;
bool is_valid;
bool has_dme;
double radial;
double target_radial;
double loc_lon;
double loc_lat;