67 lines
1.9 KiB
C++
67 lines
1.9 KiB
C++
|
#ifndef OSRM_EXTRACTOR_GUIDANCE_INTERSECTION_HPP_
|
||
|
|
#define OSRM_EXTRACTOR_GUIDANCE_INTERSECTION_HPP_
|
||
|
|
|
||
|
|
#include <string>
|
||
|
|
#include <vector>
|
||
|
|
|
||
|
|
#include "extractor/guidance/turn_instruction.hpp"
|
||
|
|
#include "util/typedefs.hpp" // EdgeID
|
||
|
|
|
||
|
|
namespace osrm
|
||
|
|
{
|
||
|
|
namespace extractor
|
||
|
|
{
|
||
|
|
namespace guidance
|
||
|
|
{
|
||
|
|
|
||
|
|
// Every Turn Operation describes a way of switching onto a segment, indicated by an EdgeID. The
|
||
|
|
// associated turn is described by an angle and an instruction that is used to announce it.
|
||
|
|
// The Turn Operation indicates what is exposed to the outside of the turn analysis.
|
||
|
|
struct TurnOperation final
|
||
|
|
{
|
||
|
|
EdgeID eid;
|
||
|
|
double angle;
|
||
|
|
TurnInstruction instruction;
|
||
|
|
};
|
||
|
|
|
||
|
|
// A Connected Road is the internal representation of a potential turn. Internally, we require
|
||
|
|
// full list of all connected roads to determine the outcome.
|
||
|
|
// The reasoning behind is that even invalid turns can influence the perceived angles, or even
|
||
|
|
// instructions themselves. An pososible example can be described like this:
|
||
|
|
//
|
||
|
|
// aaa(2)aa
|
||
|
|
// a - bbbbb
|
||
|
|
// aaa(1)aa
|
||
|
|
//
|
||
|
|
// will not be perceived as a turn from (1) -> b, and as a U-turn from (1) -> (2).
|
||
|
|
// In addition, they can influence whether a turn is obvious or not. b->(2) would also be no
|
||
|
|
// turn-operation,
|
||
|
|
// but rather a name change.
|
||
|
|
//
|
||
|
|
// If this were a normal intersection with
|
||
|
|
//
|
||
|
|
// cccccccc
|
||
|
|
// o bbbbb
|
||
|
|
// aaaaaaaa
|
||
|
|
//
|
||
|
|
// We would perceive a->c as a sharp turn, a->b as a slight turn, and b->c as a slight turn.
|
||
|
|
struct ConnectedRoad final
|
||
|
|
{
|
||
|
|
ConnectedRoad(const TurnOperation turn, const bool entry_allowed = false);
|
||
|
|
|
||
|
|
// a turn may be relevant to good instructions, even if we cannot enter the road
|
||
|
|
bool entry_allowed;
|
||
|
|
TurnOperation turn;
|
||
|
|
};
|
||
|
|
|
||
|
|
// small helper function to print the content of a connected road
|
||
|
|
std::string toString(const ConnectedRoad &road);
|
||
|
|
|
||
|
|
typedef std::vector<ConnectedRoad> Intersection;
|
||
|
|
|
||
|
|
} // namespace guidance
|
||
|
|
} // namespace extractor
|
||
|
|
} // namespace osrm
|
||
|
|
|
||
|
|
#endif /*OSRM_EXTRACTOR_GUIDANCE_INTERSECTION_HPP_*/
|