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101 lines
5.0 KiB
C++
101 lines
5.0 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 <array>
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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; Straight: how far both tracks keep straight at the end of the switch, over
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// a straight frog, the switch bent up to it as the DB bends such switches
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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, double const Straight = 0.0);
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// a slip switch bent into a curve, as ST-T1-A6 sees it: in a side track only (11.4 pkt 4b), the curvature of each track through it of
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// one sign all along it (9.7 pkt 12), its slip curves no sharper than a side track may be (table 9.2), the cant as over a switch bent,
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// none recommended in a side track (9.3 pkt 5)
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struct slip_report
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{
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// of the two tracks through the slip in its middle, 1/m, positive turning the way the line does
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double first{0.0};
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double second{0.0};
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// of the slip curves at their sharpest, 1/m
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std::vector<double> curves;
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// of the line, 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 tracks through it bent
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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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// Tracks: the two tracks through the slip, Curves: its slip curves, each from its start, the stations from 0 there; Line as for a switch,
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// From and To the stations of the ends of the first track through the slip along it
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slip_report check_slip(std::vector<std::vector<track_point>> const &Tracks, std::vector<std::vector<track_point>> const &Curves, std::vector<track_point> const &Line, double const From, double const To);
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// a line laid on from the end of the diverging track of a switch, as ST-T1-A6 sees the sudden changes of the cant deficiency right behind
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// the switch (9.11): Curvature the switch ends with (1/m, positive to the left as the line runs on), Straight metres before its end
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// over a straight frog, then the pieces of the line, each its length and its curvature at its start and at its end. The first two
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// sudden changes nearer than the intermediate element of table 9.16 taken together, else each one alone, against table 9.15 for track
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// connections at the Speed (km/h); Gauge between the axes of the rails, mm
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struct exit_report
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{
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double apart{-1.0}; // m, from the end of the curve of the switch to the next sudden change, -1 none
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double change{0.0}; // mm, the largest sudden change of the cant deficiency judged
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double allowed{0.0}; // mm, table 9.15
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double element{0.0}; // m, the intermediate element of table 9.16
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std::vector<std::string> warnings;
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};
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exit_report check_exit(double const Curvature, double const Straight, std::vector<std::array<double, 3>> const &Line, double const Speed, double const Gauge = 1500.0);
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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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