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321c9dd7ab
The track layout library came in as a subproject of its own -- its own CMakeLists, its own install and export rules, its own include tree -- which only made the build harder to follow now that everything else is a module. It is part of the editor, so it lives where the editor lives. - editor/plan_*.cppm / plan_*.cpp: the fifteen interface units and twelve implementation units, flat in editor/ beside editorTerrain and orthophoto, with the plan_ prefix keeping them clear of what was already there (editor/turnouts is the preset catalogue, so the geometry is plan_turnout_geometry). - modules are named eu07.editor.plan_*, like every other module in the tree. - namespaces move under the editor's own: editor::plan, editor::plan::geometry, ::io, ::render. The library's old name is gone from the sources and the docs. - every moved file carries the MPL header the rest of the tree carries; it had none. version.hpp went with the subproject: macros only, and unused. - the umbrella header is dropped -- nothing imported it. - the unit tests survive the fold: editor/tests, behind EU07_EDITOR_PLAN_TESTS (off by default), compiles the interfaces a second time into a small library of its own, because a test can only import modules from a target it links and linking the game would drag the whole simulator in. The code under test needs nothing but a compiler. 7/7 pass. - a switch may now be written with two dashes as well: --editor beside -editor. Builds with clang 22 (-DWITH_BETTER_RENDERER=OFF); -editor and --editor both come up in the editor on empty ground.
86 lines
3.8 KiB
C++
86 lines
3.8 KiB
C++
module;
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#include <cmath>
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#include <string>
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#include <vector>
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module eu07.editor.turnouts;
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import eu07.editor.plan_turnout_geometry;
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/*
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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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namespace editor
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{
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namespace
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{
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// the blade ends where the gap to the stock rail takes the przekladka in its heel.
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// this is what fixes the length of a curved blade, so it is said once here.
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// TODO: dlugosci iglic z tablic Id-1, gdy beda pod reka
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double const heel_offset{0.136}; // metres
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// 49E1 railhead. the blade is planed from its tip until it is this wide
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double const railtop_width{0.070};
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// a turnout with an iglica lukowa styczna do opornicy o scietym ostrzu (Koc, rys. 5.9).
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// the curve is theoretically tangent to the opornica at PR, but the blade cannot begin
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// there - it begins where there is metal enough, at the ostrze, and its planed nose (d)
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// runs on to the point where the rail is u thick. what lies between PR and the ostrze is
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// the odcinek przediglicowy: the curve is already there, the vehicle is still on the
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// through track. Koc's tablica 5.1 gives a, d and u per type, and they obey
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// a + d = the run to a gap of u, taken on the blade's curve R + s/2
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// so a is derived from u and d here rather than copied. The drawing dimensions it on the
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// rail and a piece length is on the axis, so what goes in is the run scaled by R/(R+s/2);
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// against the table itself that is a tenth of a millimetre at 1200-1:18,5, six at 190-1:9.
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//
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// b is the rear tangent from the drawing: a rozjazd podstawowy (krzyzownica lukowa) has
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// b = R*tg(alfa/2) and no straight at all, while a straight crossing carries the arc out
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// on a prosta krzyzownicowa of b - R*tg(alfa/2). Passing 0 asks for the podstawowy.
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turnout_preset curved_tangent(std::string name, double crossing_n, double radius, double tip_thickness, double nose, double back_tangent = 0.0)
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{
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auto const alfa{std::atan(1.0 / crossing_n)};
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auto const tangent{radius * std::tan(0.5 * alfa)};
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auto const b{back_tangent > 0.0 ? back_tangent : tangent};
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auto const lead{editor::plan::blade_run_to_offset(radius, 0.0, tip_thickness) - nose};
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auto const blade{editor::plan::blade_run_to_offset(radius, 0.0, heel_offset) - lead};
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turnout_preset preset{std::move(name), crossing_n, tangent + b, tip_thickness, nose, railtop_width, {}};
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preset.pieces.push_back({0, lead, radius, radius, 0.0});
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preset.pieces.push_back({1, blade, radius, radius, 0.0});
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preset.pieces.push_back({2, radius * alfa - lead - blade, radius, radius, 0.0});
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if (b - tangent > 1e-6)
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{
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preset.pieces.push_back({3, b - tangent, 0.0, 0.0, 0.0});
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}
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return preset;
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}
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} // namespace
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std::vector<turnout_preset> const &turnout_presets()
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{
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// the standard PKP rozjazdy zwyczajne. u and d come from Koc, tablica 5.1 (iglice
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// styczne do opornicy o scietym ostrzu); the rear tangents from the catalogue drawings:
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// rys. 5.13 gives Rz 49E1-190-1:9 as 27138 = 10523 + 16615 (krzyzownica prosta) and
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// rys. 5.15 gives Rz 49E1-300-1:9 as 33230 = 16615 + 16615 (lukowa, rozjazd podstawowy).
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// krzyzownice proste sa w 49E1-190-1:9 i 49E1-500-1:14, lukowe w 300-1:9, 500-1:12 i
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// 1200-1:18,5. TODO: 1:7,5 R190 i 1:14 R500 czekaja na wlasne u/d i styczne z Id-1
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static std::vector<turnout_preset> const presets{
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curved_tangent("Rz 1:7,5 R190", 7.5, 190.0, 0.0049, 0.1250),
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curved_tangent("Rz 1:9 R190", 9.0, 190.0, 0.0049, 0.1250, 16.615),
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curved_tangent("Rz 1:9 R300", 9.0, 300.0, 0.0044, 0.1250),
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curved_tangent("Rz 1:12 R500", 12.0, 500.0, 0.0053, 0.1250),
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curved_tangent("Rz 1:14 R500", 14.0, 500.0, 0.0053, 0.1250, 24.544),
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curved_tangent("Rz 1:14 R760", 14.0, 760.0, 0.0050, 0.1250),
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curved_tangent("Rz 1:18,5 R1200", 18.5, 1200.0, 0.0050, 0.1304)};
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return presets;
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}
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} // namespace editor
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