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#include "routing/fake_ending.hpp"
#include "routing/index_graph.hpp"
#include "routing/world_graph.hpp"
#include "geometry/mercator.hpp"
#include "geometry/parametrized_segment.hpp"
#include "base/math.hpp"
#include <utility>
using namespace routing;
using namespace std;
namespace
{
Junction CalcProjectionToSegment(Junction const & begin, Junction const & end,
m2::PointD const & point)
{
m2::ParametrizedSegment<m2::PointD> segment(begin.GetPoint(), end.GetPoint());
auto const projectedPoint = segment.ClosestPointTo(point);
auto const distBeginToEnd = MercatorBounds::DistanceOnEarth(begin.GetPoint(), end.GetPoint());
double constexpr kEpsMeters = 2.0;
if (base::AlmostEqualAbs(distBeginToEnd, 0.0, kEpsMeters))
return Junction(projectedPoint, begin.GetAltitude());
auto const distBeginToProjection =
MercatorBounds::DistanceOnEarth(begin.GetPoint(), projectedPoint);
auto const altitude = begin.GetAltitude() + (end.GetAltitude() - begin.GetAltitude()) *
distBeginToProjection / distBeginToEnd;
return Junction(projectedPoint, altitude);
}
FakeEnding MakeFakeEndingImpl(Junction const & segmentBack, Junction const & segmentFront,
Segment const & segment, m2::PointD const & point, bool oneWay)
{
auto const & projectedJunction = CalcProjectionToSegment(segmentBack, segmentFront, point);
FakeEnding ending;
ending.m_originJunction = Junction(point, projectedJunction.GetAltitude());
ending.m_projections.emplace_back(segment, oneWay, segmentFront, segmentBack, projectedJunction);
return ending;
}
} // namespace
namespace routing
{
FakeEnding MakeFakeEnding(Segment const & segment, m2::PointD const & point, IndexGraph & graph)
{
auto const & road = graph.GetGeometry().GetRoad(segment.GetFeatureId());
bool const oneWay = road.IsOneWay();
auto const & frontJunction = road.GetJunction(segment.GetPointId(true /* front */));
auto const & backJunction = road.GetJunction(segment.GetPointId(false /* front */));
return MakeFakeEndingImpl(backJunction, frontJunction, segment, point, oneWay);
}
FakeEnding MakeFakeEnding(Segment const & segment, m2::PointD const & point, WorldGraph & graph)
{
bool const oneWay = graph.IsOneWay(segment.GetMwmId(), segment.GetFeatureId());
auto const & frontJunction = graph.GetJunction(segment, true /* front */);
auto const & backJunction = graph.GetJunction(segment, false /* front */);
return MakeFakeEndingImpl(backJunction, frontJunction, segment, point, oneWay);
}
} // namespace routing
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