void
Trace::push_back(const AircraftState& state)
{
assert(cached_size == delta_list.size());
assert(cached_size == chronological_list.Count());
if (empty()) {
// first point determines origin for flat projection
task_projection.reset(state.location);
task_projection.update_fast();
} else if (state.time < fixed(back().GetTime())) {
// gone back in time
if (unsigned(state.time) + 180 < back().GetTime()) {
/* not fixable, clear the trace and restart from scratch */
clear();
return;
}
/* not much, try to fix it */
EraseLaterThan(unsigned(state.time) - 10);
} else if ((unsigned)state.time - back().GetTime() < 2)
// only add one item per two seconds
return;
TracePoint tp(state);
tp.project(task_projection);
EnforceTimeWindow(tp.GetTime());
if (size() >= max_size)
Thin();
assert(size() < max_size);
TraceDelta &td = Insert(tp);
td.InsertBefore(chronological_list);
++cached_size;
if (!chronological_list.IsFirst(td))
UpdateDelta(td.GetPrevious());
++append_serial;
}
void EraseLaterThan(fixed time) {
EraseLaterThan((unsigned)time);
}