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Added some null pointer checks in FGAILocalTraffic to handle airports without tower

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This commit is contained in:
Csaba Halasz 2009-10-25 16:08:38 +01:00 committed by Tim Moore
parent ab149d0036
commit b8f5013751
1 changed files with 11 additions and 10 deletions
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19
src/ATCDCL/AILocalTraffic.cxx
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@ -841,7 +841,7 @@ void FGAILocalTraffic::FlyTrafficPattern(double dt) {
// TODO - At hot 'n high airports this may be 500ft AGL though - need to make this a variable.
if((_pos.getElevationM() - rwy.threshold_pos.getElevationM()) * SG_METER_TO_FEET > 700) {
double cc = 0.0;
if(tower->GetCrosswindConstraint(cc)) {
if(tower && tower->GetCrosswindConstraint(cc)) {
if(orthopos.y() > cc) {
//cout << "Turning to crosswind, distance from threshold = " << orthopos.y() << '\n';
leg = TURN1;
@ -884,7 +884,7 @@ void FGAILocalTraffic::FlyTrafficPattern(double dt) {
// turn 1000m out for now, taking other traffic into accout
if(fabs(orthopos.x()) > 900) {
double dd = 0.0;
if(tower->GetDownwindConstraint(dd)) {
if(tower && tower->GetDownwindConstraint(dd)) {
if(fabs(orthopos.x()) > fabs(dd)) {
//cout << "Turning to downwind, distance from centerline = " << fabs(orthopos.x()) << '\n';
leg = TURN2;
@ -930,7 +930,7 @@ void FGAILocalTraffic::FlyTrafficPattern(double dt) {
// For now we're assuming that we aim to follow the same glidepath regardless of wind.
double d1;
double d2;
CalculateSoD((tower->GetBaseConstraint(d1) ? d1 : -1000.0), (tower->GetDownwindConstraint(d2) ? d2 : 1000.0 * patternDirection), (patternDirection ? true : false));
CalculateSoD(((tower && tower->GetBaseConstraint(d1)) ? d1 : -1000.0), ((tower && tower->GetDownwindConstraint(d2)) ? d2 : 1000.0 * patternDirection), (patternDirection ? true : false));
if(SoD.leg == DOWNWIND) {
descending = (orthopos.y() < SoD.y ? true : false);
}
@ -950,7 +950,7 @@ void FGAILocalTraffic::FlyTrafficPattern(double dt) {
if(orthopos.y() < -1000.0 + turn_radius) {
//if(orthopos.y() < -980) {
double bb = 0.0;
if(tower->GetBaseConstraint(bb)) {
if(tower && tower->GetBaseConstraint(bb)) {
if(fabs(orthopos.y()) > fabs(bb)) {
//cout << "Turning to base, distance from threshold = " << fabs(orthopos.y()) << '\n';
leg = TURN3;
@ -982,7 +982,7 @@ void FGAILocalTraffic::FlyTrafficPattern(double dt) {
double d1;
// Make downwind leg position artifically large to avoid any chance of SoD being returned as
// on downwind when we are already on base.
CalculateSoD((tower->GetBaseConstraint(d1) ? d1 : -1000.0), (10000.0 * patternDirection), (patternDirection ? true : false));
CalculateSoD(((tower && tower->GetBaseConstraint(d1)) ? d1 : -1000.0), (10000.0 * patternDirection), (patternDirection ? true : false));
if(SoD.leg == BASE) {
descending = (fabs(orthopos.y()) < fabs(SoD.y) ? true : false);
}
@ -1207,10 +1207,11 @@ void FGAILocalTraffic::CalculateSoD(double base_leg_pos, double downwind_leg_pos
void FGAILocalTraffic::TransmitPatternPositionReport(void) {
// airport name + "traffic" + airplane callsign + pattern direction + pattern leg + rwy + ?
string trns = "";
string trns;
int code = 0;
const string& apt_name = tower ? tower->get_name() : airportID;
trns += tower->get_name();
trns += apt_name;
trns += " Traffic ";
trns += plane.callsign;
if(patternDirection == 1) {
@ -1249,10 +1250,10 @@ void FGAILocalTraffic::TransmitPatternPositionReport(void) {
}
trns += ConvertRwyNumToSpokenString(rwy.rwyID);
trns += " ";
trns += ' ';
// And add the airport name again
trns += tower->get_name();
trns += apt_name;
pending_transmission = trns;
ConditionalTransmit(60.0, code); // Assume a report of this leg will be invalid if we can't transmit within a minute.