inline double
OrderedTask::ScanDistanceMin(const GeoPoint &location, bool full)
{
if (!full && location.IsValid() && last_min_location.IsValid() &&
DistanceIsSignificant(location, last_min_location)) {
const TaskWaypoint *active = GetActiveTaskPoint();
if (active != nullptr) {
const GeoPoint &target = active->GetWaypoint().location;
const unsigned last_distance =
(unsigned)last_min_location.Distance(target);
const unsigned cur_distance =
(unsigned)location.Distance(target);
/* do the full scan only if the distance to the active task
point has changed by more than 5%, otherwise we don't expect
any relevant changes */
if (last_distance < 2000 || cur_distance < 2000 ||
last_distance * 20 >= cur_distance * 21 ||
cur_distance * 20 >= last_distance * 21)
full = true;
}
}
if (full) {
RunDijsktraMin(location);
last_min_location = location;
}
return task_points.front()->ScanDistanceMin();
}
void
OrderedTask::ScanDistanceMinMax(const GeoPoint &location, bool force,
fixed *dmin, fixed *dmax)
{
if (!taskpoint_start)
return;
if (force)
*dmax = ScanDistanceMax();
bool force_min = force || DistanceIsSignificant(location, last_min_location);
*dmin = ScanDistanceMin(location, force_min);
}
