void
OLCTriangle::AddFinishEdges(const ScanTaskPoint origin)
{
assert(IsFinal(origin.GetStageNumber() + 1));
if (predict) {
// dummy just to close the triangle
Link(ScanTaskPoint(origin.GetStageNumber() + 1, n_points - 1), origin, 0);
} else {
const ScanTaskPoint start = FindStart(origin);
const TracePoint &start_point = GetPoint(start);
const TracePoint &origin_point = GetPoint(origin);
const unsigned max_range =
trace_master.ProjectRange(origin_point.GetLocation(), max_distance);
/* check all remaining points, see which ones match the
conditions */
const ScanTaskPoint begin(origin.GetStageNumber() + 1, 0);
const ScanTaskPoint end(origin.GetStageNumber() + 1,
origin.GetPointIndex());
for (ScanTaskPoint i = begin; i != end; i.IncrementPointIndex())
if (CalcEdgeDistance(start, i) <= max_range &&
start_point.GetLocation().Distance(GetPoint(i).GetLocation()) < max_distance)
Link(i, origin, CalcEdgeDistance(origin, i));
}
}
bool
OLCDijkstra::solve()
{
if (m_dijkstra.empty()) {
set_weightings();
n_points = olc.get_trace_points(m_full_trace).size();
}
if (n_points < num_stages)
return false;
if (m_dijkstra.empty()) {
m_dijkstra.reset(ScanTaskPoint(0, 0));
add_start_edges();
if (m_dijkstra.empty())
// no processing to perform!
// @todo
// problem with this is it will immediately ask
// OnlineContest for new data, which will be expensive
// instead, new data should arrive only when preconditions
// are satisfied (significant difference and valid)
return true;
}
return solve_inner();
}
void
OLCTriangle::AddEdges(const ScanTaskPoint origin)
{
assert(origin.GetPointIndex() < n_points);
switch (origin.GetStageNumber()) {
case 0:
// add points up to finish
for (ScanTaskPoint destination(origin.GetStageNumber() + 1, 0),
end(origin.GetStageNumber() + 1, origin.GetPointIndex());
destination != end; destination.IncrementPointIndex()) {
const unsigned d = CalcEdgeDistance(origin, destination);
if (!is_fai || 4 * d >= best_d)
/* no reason to add candidate if worse than 25% rule for FAI
tasks */
Link(destination, origin, GetStageWeight(origin.GetStageNumber()) * d);
}
break;
case 1: {
ScanTaskPoint previous = dijkstra.GetPredecessor(origin);
// give first leg points to penultimate node
TriangleSecondLeg sl(is_fai, GetPoint(previous), GetPoint(origin));
for (ScanTaskPoint destination(origin.GetStageNumber() + 1,
origin.GetPointIndex() + 1),
end(origin.GetStageNumber() + 1, n_points - 1);
destination != end; destination.IncrementPointIndex()) {
TriangleSecondLeg::Result result = sl.Calculate(GetPoint(destination),
best_d);
const unsigned d = result.leg_distance;
if (d > 0) {
best_d = result.total_distance;
Link(destination, origin, GetStageWeight(origin.GetStageNumber()) * d);
// we have an improved solution
is_complete = true;
// need to scan again whether path is closed
is_closed = false;
first_tp = origin.GetPointIndex();
}
}
}
break;
case 2:
// dummy just to close the triangle
Link(ScanTaskPoint(origin.GetStageNumber() + 1, n_points - 1), origin, 0);
break;
default:
assert(false);
}
}
bool
TaskDijkstraMax::DistanceMax()
{
if (!RefreshTask())
return false;
dijkstra.Reserve(256);
dijkstra.Clear();
LinkStart(ScanTaskPoint(0, 0));
return Run();
}
bool
ContestDijkstra::Solve(bool exhaustive)
{
if (dijkstra.empty()) {
set_weightings();
dijkstra.reserve(CONTEST_QUEUE_SIZE);
}
assert(num_stages <= MAX_STAGES);
if (dijkstra.empty()) {
update_trace();
if (n_points < num_stages)
return true;
// don't re-start search unless we have had new data appear
if (!trace_dirty) {
return true;
}
} else if (exhaustive) {
update_trace();
if (n_points < num_stages)
return true;
} else if (n_points < num_stages) {
update_trace();
return true;
}
if (trace_dirty) {
trace_dirty = false;
dijkstra.restart(ScanTaskPoint(0, 0));
start_search();
add_start_edges();
if (dijkstra.empty()) {
return true;
}
}
#ifdef INSTRUMENT_TASK
count_olc_solve++;
count_olc_size = max(count_olc_size, dijkstra.queue_size());
#endif
if (distance_general(exhaustive ? 0 - 1 : 25)) {
SaveSolution();
update_trace();
return true;
}
return !dijkstra.empty();
}
bool
TaskDijkstraMin::DistanceMin(const SearchPoint ¤tLocation)
{
if (!RefreshTask())
return false;
dijkstra.Reserve(256);
dijkstra.Clear();
if (active_stage > 0) {
AddStartEdges(currentLocation);
} else {
LinkStart(ScanTaskPoint(0, 0));
}
return Run();
}
OLCDijkstra::OLCDijkstra(OnlineContest& _olc, const unsigned n_legs,
const unsigned finish_alt_diff,
const bool full_trace):
NavDijkstra<TracePoint>(n_legs + 1),
m_dijkstra(ScanTaskPoint(0, 0), false),
olc(_olc),
m_finish_alt_diff(finish_alt_diff),
solution_found(false),
best_distance(fixed_zero),
best_speed(fixed_zero),
best_time(fixed_zero),
m_full_trace(full_trace)
{
m_weightings.reserve(n_legs);
best_solution.reserve(num_stages);
reset();
}
/**
* Returns the solution point for the specified task point. Call
* this after run() has returned true.
*/
const SearchPoint &GetSolution(unsigned stage) const {
assert(stage < num_stages);
return GetPoint(ScanTaskPoint(stage, solution[stage]));
}