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62 lines
2.6 KiB
C++
62 lines
2.6 KiB
C++
/*
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This Source Code Form is subject to the
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terms of the Mozilla Public License, v.
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2.0. If a copy of the MPL was not
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distributed with this file, You can
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obtain one at
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http://mozilla.org/MPL/2.0/.
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*/
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#pragma once
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#include <string>
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#include <vector>
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// a switch laid into a curve or into a transition curve, as the standard of PKP PLK ST-T1-A6 sees it: the curvatures of its tracks
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// (9.7 pkt 12, 11.4, table 11.9) and the cant along it, which is to stay the same over it or be ramped from its ends (9.6 pkt
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// 16-17, 11.4 pkt 7, table 9.6)
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namespace switch_curve
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{
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// a point of a track in the plan: how far along it, which way it heads (radians, growing as it turns to the left), its cant (mm)
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struct track_point
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{
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double station{0.0};
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double heading{0.0};
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double cant{0.0};
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};
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// the curvature of the track at the station, from its headings a metre either side of it, 1/m positive to the left
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double curvature_at(std::vector<track_point> const &Track, double const Station);
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// the stations where the cant of the track starts or stops changing: the ends of its cant ramps
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std::vector<double> ramp_ends(std::vector<track_point> const &Track);
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struct switch_report
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{
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// at the start and at the end of the switch, 1/m, positive turning the way the line does
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double main_start{0.0};
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double main_end{0.0};
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double branch_start{0.0};
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double branch_end{0.0};
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// of the main track, mm
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double cant_start{0.0};
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double cant_end{0.0};
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bool curved{false}; // the main track bent
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bool transition{false}; // its curvature changing along the switch
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std::vector<std::string> notes;
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std::vector<std::string> warnings;
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};
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// Main, Branch: the tracks of the switch from its start, the stations from 0 there; Line: the track it's laid into, From and To the
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// stations of the start and the end of the switch along it, From after To where it goes back along the line. Radius and Ratio:
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// of the diverging track of the basic switch it's bent from
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switch_report check(std::vector<track_point> const &Main, std::vector<track_point> const &Branch, std::vector<track_point> const &Line, double const From, double const To, double const Radius,
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double const Ratio);
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// the start of a switch Length long, going Direction along the line, drawn to where its start or its end meets an end of a cant ramp,
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// or to where it keeps the 6 m off it, when the station pressed is within Reach of that; What receives which of them, empty for none
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double snapped_start(std::vector<double> const &Ramps, double const Pressed, double const Length, int const Direction, double const Reach, std::string *What = nullptr);
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} // namespace switch_curve
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