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[Routing] Refactoring

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Signed-off-by: Anton Makouski <anton.makouski@gmail.com>
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Anton Makouski 2022-05-12 18:27:20 +03:00
parent c363cde673
commit 083a5f264e
1 changed files with 20 additions and 0 deletions
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20
routing/turns_generator.cpp
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@ -469,6 +469,26 @@ bool GetNextRoutePointIndex(IRoutingResult const & result, RoutePointIndex const
return true;
}
// Normally loadedSegments structure is:
// - Start point. Fake loop LoadedPathSegment with 1 segment of zero length.
// - Straight jump from start point to the beginning of real route. LoadedPathSegment with 1 segment.
// - Real route. N LoadedPathSegments, each with arbitrary amount of segments. N >= 1.
// - Straight jump from the end of real route to finish point. LoadedPathSegment with 1 segment.
// - Finish point. Fake loop LoadedPathSegment with 1 segment of zero length.
// So minimal amount of segments is 5.
// Resulting structure of turnsDir:
// No Turn for 0th segment (no ingoing). m_index == 0.
// No Turn for 1st segment (ingoing fake loop) - at start point. m_index == 1.
// No Turn for 2nd (ingoing == jump) - at beginning of real route. m_index == 2.
// Possible turn for next N-1 segments. m_index >= 3.
// No Turn for (2 + N + 1)th segment (outgoing jump) - at finish point. m_index = 3 + M.
// No Turn for (2 + N + 2)th segment (outgoing fake loop) - at finish point. m_index == 4 + M.
// Added ReachedYourDestination - at finish point. m_index == 4 + M.
// Where M - total amount of all segments from all LoadedPathSegments (size of |segments|).
// So minimum m_index of ReachedYourDestination is 5 (real route with single segment),
// and minimal |turnsDir| is - single ReachedYourDestination with m_index == 5.
RouterResultCode MakeTurnAnnotation(IRoutingResult const & result, NumMwmIds const & numMwmIds,
VehicleType const & vehicleType,
base::Cancellable const & cancellable,