/**
* Check whether this intersection should be added to, or updated in, the warning manager
*
* @param airspace Airspace corresponding to current intersection
*/
void Intersection(const AbstractAirspace& airspace) {
if (!airspace.IsActive())
return; // ignore inactive airspaces completely
if (!warning_manager.GetConfig().IsClassEnabled(airspace.GetType()) ||
ExcludeAltitude(airspace))
return;
AirspaceWarning *warning = warning_manager.GetWarningPtr(airspace);
if (warning == NULL || warning->IsStateAccepted(warning_state)) {
AirspaceInterceptSolution solution;
if (mode_inside) {
airspace.Intercept(state, perf, solution, state.location, state.location);
} else {
solution = Intercept(airspace, state, perf);
}
if (!solution.IsValid())
return;
if (solution.elapsed_time > max_time)
return;
if (warning == NULL)
warning = warning_manager.GetNewWarningPtr(airspace);
warning->UpdateSolution(warning_state, solution);
found = true;
}
}
void intersection(const AbstractAirspace &as) {
*fout << "# intersection point\n";
for (auto it = intersections.begin(); it != intersections.end(); ++it) {
const GeoPoint start = (it->first);
const GeoPoint end = (it->second);
*fout << start.longitude << " " << start.latitude << " " << "\n";
*fout << end.longitude << " " << end.latitude << " " << "\n\n";
}
AirspaceInterceptSolution solution = Intercept(as, m_state, m_perf);
if (solution.IsValid()) {
*iout << "# intercept " << solution.elapsed_time << " h " << solution.altitude << "\n";
*iout << solution.location.longitude << " " << solution.location.latitude << " " << "\n\n";
}
}
void closest(const AbstractAirspace &as) {
GeoPoint c = as.ClosestPoint(state.location, projection);
if (fout) {
*fout << "# closest point\n";
*fout << c.longitude << " " << c.latitude << " " << "\n";
*fout << state.location.longitude << " " << state.location.latitude << " " << "\n\n";
}
GeoVector vec(state.location, c);
vec.distance = fixed(20000); // set big distance (for testing)
const AirspaceInterceptSolution solution =
as.Intercept(state, vec.EndPoint(state.location), projection, m_perf);
if (solution.IsValid()) {
if (fout) {
*fout << "# intercept in " << solution.elapsed_time << " h " << solution.altitude << "\n";
}
}
}
AirspaceInterceptSolution
AbstractAirspace::Intercept(const AircraftState &state,
const AirspaceAircraftPerformance &perf,
const GeoPoint &loc_start,
const GeoPoint &loc_end) const
{
const bool only_vertical = (loc_start == loc_end) &&
(loc_start == state.location);
const auto distance_start = only_vertical
? double(0)
: state.location.Distance(loc_start);
const auto distance_end = loc_start == loc_end
? distance_start
: (only_vertical ? double(0) : state.location.Distance(loc_end));
AirspaceInterceptSolution solution =
AirspaceInterceptSolution::Invalid();
// need to scan at least three sides, top, far, bottom (if not terrain)
AirspaceInterceptSolution solution_candidate =
AirspaceInterceptSolution::Invalid();
if (!only_vertical) {
solution_candidate = InterceptVertical(state, perf, distance_start);
// search near wall
if (solution_candidate.IsEarlierThan(solution))
solution = solution_candidate;
if (distance_end != distance_start) {
// need to search far wall also
solution_candidate = InterceptVertical(state, perf, distance_end);
if (solution_candidate.IsEarlierThan(solution))
solution = solution_candidate;
}
}
solution_candidate = InterceptHorizontal(state, perf, distance_start,
distance_end, false);
// search top wall
if (solution_candidate.IsEarlierThan(solution))
solution = solution_candidate;
// search bottom wall
if (!altitude_base.IsTerrain()) {
solution_candidate = InterceptHorizontal(state, perf, distance_start,
distance_end, true);
if (solution_candidate.IsEarlierThan(solution))
solution = solution_candidate;
}
if (solution.IsValid()) {
if (solution.distance == distance_start)
solution.location = loc_start;
else if (solution.distance == distance_end)
solution.location = loc_end;
else if (distance_end > 0)
solution.location =
state.location.Interpolate(loc_end, solution.distance / distance_end);
else
solution.location = loc_start;
assert(solution.distance >= 0);
}
return solution;
}
bool IsEarlierThan(const AirspaceInterceptSolution &other) const {
return IsValid() && (!other.IsValid() ||
elapsed_time < other.elapsed_time);
}