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AI traffic performance boost for busy airports

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Stop ground elevation (scenery) checks for stationary AI aircraft.
This commit is contained in:
ThorstenB 2011-01-10 20:53:46 +01:00
parent 5deec69e00
commit 6ff61836fe
2 changed files with 19 additions and 2 deletions
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18
src/AIModel/AIAircraft.cxx
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@ -84,6 +84,7 @@ FGAIAircraft::FGAIAircraft(FGAISchedule *ref) : FGAIBase(otAircraft) {
holdPos = false;
needsTaxiClearance = false;
_needsGroundElevation = true;
_performance = 0; //TODO initialize to JET_TRANSPORT from PerformanceDB
dt = 0;
@ -179,6 +180,8 @@ void FGAIAircraft::checkVisibility()
void FGAIAircraft::AccelTo(double speed) {
tgt_speed = speed;
if (!isStationary())
_needsGroundElevation = true;
}
@ -334,7 +337,7 @@ void FGAIAircraft::ProcessFlightPlan( double dt, time_t now ) {
use_perf_vs = true;
}
}
tgt_speed = prev->speed;
AccelTo(prev->speed);
hdg_lock = alt_lock = true;
no_roll = prev->on_ground;
}
@ -403,6 +406,8 @@ bool FGAIAircraft::loadNextLeg(double distance) {
void FGAIAircraft::getGroundElev(double dt) {
dt_elev_count += dt;
if (!needGroundElevation())
return;
// Update minimally every three secs, but add some randomness
// to prevent all AI objects doing this in synchrony
if (dt_elev_count < (3.0) + (rand() % 10))
@ -424,14 +429,22 @@ void FGAIAircraft::getGroundElev(double dt) {
{
double alt;
if (getGroundElevationM(SGGeod::fromGeodM(pos, 20000), alt, 0))
{
tgt_altitude_ft = alt * SG_METER_TO_FEET;
if (isStationary())
{
// aircraft is stationary and we obtained altitude for this spot - we're done.
_needsGroundElevation = false;
}
}
}
}
}
void FGAIAircraft::doGroundAltitude() {
if (fabs(altitude_ft - (tgt_altitude_ft+groundOffset)) > 1000.0)
if ((fabs(altitude_ft - (tgt_altitude_ft+groundOffset)) > 1000.0)||
(fabs(speed)<0.0001))
altitude_ft = (tgt_altitude_ft + groundOffset);
else
altitude_ft += 0.1 * ((tgt_altitude_ft+groundOffset) - altitude_ft);
@ -601,6 +614,7 @@ void FGAIAircraft::handleFirstWaypoint() {
Transform(); // make sure aip is initialized.
getGroundElev(60.1); // make sure it's executed first time around, so force a large dt value
doGroundAltitude();
_needsGroundElevation = true; // check ground elevation again (maybe scenery wasn't available yet)
}
// Make sure to announce the aircraft's position
announcePositionToController();

3
src/AIModel/AIAircraft.hxx
View file

@ -141,6 +141,8 @@ private:
void updateActualState();
void handleATCRequests();
void checkVisibility();
inline bool isStationary() { return ((fabs(speed)<=0.0001)&&(fabs(tgt_speed)<=0.0001));}
inline bool needGroundElevation() { if (!isStationary()) _needsGroundElevation=true;return _needsGroundElevation;}
double sign(double x);
@ -160,6 +162,7 @@ private:
bool reachedWaypoint;
bool needsTaxiClearance;
bool _needsGroundElevation;
time_t timeElapsed;
PerformanceData* _performance; // the performance data for this aircraft