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fix the issues with the predicted path to planned path matching

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This commit is contained in:
Sven Czarnian
2021-12-15 16:53:55 +01:00
parent 88c40575ff
commit dbb3d6d557
2 changed files with 37 additions and 14 deletions
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2
include/aman/types/Inbound.h
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@@ -45,7 +45,7 @@ namespace aman {
Velocity groundSpeed(const Length& altitude, const Velocity& ias, const Angle& heading);
void createWindTables(const google::protobuf::RepeatedPtrField<aman::WindData>& wind);
static int matchToPredictedPath(const EuroScopePlugIn::CFlightPlanPositionPredictions& predictions, const GeoCoordinate& position,
Length& trackmiles);
const Velocity& groundspeed, Length& trackmiles);
void predictETA(const EuroScopePlugIn::CRadarTarget& target, const EuroScopePlugIn::CFlightPlanPositionPredictions& predictions);
public:

49
src/types/Inbound.cpp
View File

@@ -229,30 +229,46 @@ static __inline Angle __normalize(const Angle& angle) {
}
int Inbound::matchToPredictedPath(const EuroScopePlugIn::CFlightPlanPositionPredictions& predictions, const GeoCoordinate& position,
Length& trackmiles) {
const Velocity& groundspeed, Length& trackmiles) {
trackmiles = 0_m;
if (0 == predictions.GetPointsNumber())
if (1 >= predictions.GetPointsNumber())
return 0;
GeoCoordinate lastPosition(__convert(predictions.GetPosition(0)));
std::vector<Length> distances;
distances.reserve(static_cast<std::size_t>(predictions.GetPointsNumber()) - 1);
/* calculate the "potential field" for the distances*/
for (int i = 1; i < predictions.GetPointsNumber(); ++i) {
GeoCoordinate coordinate(__convert(predictions.GetPosition(i)));
const auto prev = lastPosition.bearingTo(position);
const auto next = coordinate.bearingTo(position);
const auto delta = __normalize(prev - next);
if (90_deg <= delta.abs() || 2.0_nm >= lastPosition.distanceTo(position)) {
trackmiles += lastPosition.distanceTo(position);
return i - 1;
const GeoCoordinate coordinate(__convert(predictions.GetPosition(i)));
distances.push_back(coordinate.distanceTo(position));
}
/* get the index of the minimal value*/
std::size_t idx = std::min_element(distances.cbegin(), distances.cend()) - distances.cbegin();
/* calculate the theoretical maximum distance (assuming one minute steps) and validate the distance */
const auto& maxDistance = groundspeed * 1_min;
if (gsl::at(distances, idx) > maxDistance)
return 0;
if (idx + 1 < static_cast<std::size_t>(predictions.GetPointsNumber()) && 0 != idx) {
const auto bearingCurrent = position.bearingTo(GeoCoordinate(__convert(predictions.GetPosition(idx))));
const auto bearingNext = position.bearingTo(GeoCoordinate(__convert(predictions.GetPosition(idx + 1))));
/* current and next in front of position -> use the previous element */
if (90_deg > __normalize(bearingNext - bearingCurrent).abs())
idx -= 1;
}
GeoCoordinate lastPosition(__convert(predictions.GetPosition(0)));
for (std::size_t i = 1; i <= static_cast<int>(idx + 1); ++i) {
const GeoCoordinate coordinate(__convert(predictions.GetPosition(i)));
trackmiles += lastPosition.distanceTo(coordinate);
lastPosition = coordinate;
}
return predictions.GetPointsNumber();
return static_cast<int>(idx);
}
void Inbound::predictETA(const EuroScopePlugIn::CRadarTarget& target, const EuroScopePlugIn::CFlightPlanPositionPredictions& predictions) {
@@ -261,9 +277,16 @@ void Inbound::predictETA(const EuroScopePlugIn::CRadarTarget& target, const Euro
return;
}
/* get the ground speed */
Velocity groundspeed;
if (0 == target.GetGS())
groundspeed = static_cast<double>(target.GetPosition().GetReportedGS()) * knot;
else
groundspeed = static_cast<double>(target.GetGS()) * knot;
const auto& destination = gsl::at(this->m_arrivalRoute, this->m_nextStarWaypoint);
Length distanceToNextWaypoint = 0_m;
Inbound::matchToPredictedPath(predictions, destination.position(), distanceToNextWaypoint);
Inbound::matchToPredictedPath(predictions, destination.position(), groundspeed, distanceToNextWaypoint);
this->m_trackmiles = distanceToNextWaypoint;
/* predict the flight and the descend */