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2376e4867b
The library was a heap of half-built services - fitting, parallelism, niwelety, an SVG writer - that never met each other. In their place is one authored Document and one solver that lays it whole: tracks as element chains, turnouts placed on them, and a Solution that is rebuilt from scratch every time and never fed back into the document. What cannot be laid comes back as a diagnostic with the number in it rather than as silence or a fitted-away error. Turnouts are dimensioned the way the drawings dimension them. The blade follows Koc's rys. 5.9 - the curve is theoretically tangent to the opornica at PR, the blade starts at a with a planed nose of d, and A is where the rail stands u thick - and a + d derived that way lands on his tablica 5.1. Bending follows 5.3.6: it rotates the triangle OBC about the centre of the turnout, so the tangent t and the crossing angle stand and both radii follow from them. That is Koc's (5.7) and (5.8) without coding either, and it puts a symmetrically bent Rz 49E1-190-1:9 on the catalogue's Rlus 49E1-380,292-1:9. A rozjazd standing on a curve is bent onto it; one on a track drawn straight can carry a bend of its own. The szyny laczace take up the difference, because the switch and the frog are only bent, not re-cut. The plan panel draws all of it: the catalogue drawing of a type with its construction points, the theoretical arc dashed where no rail runs, and the blade nose as the straight it is cut as. Dragging a straight now stops where it would pull the track out from under a turnout. File format goes to m0s 6. Versions 3 to 5 still open.
32 lines
1.2 KiB
C++
32 lines
1.2 KiB
C++
#pragma once
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#include <optional>
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#include <string>
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#include "maj0sted/editor/model.hpp"
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namespace maj0sted::io {
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/// The `.m0s` format, version 3.
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///
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/// Line-oriented text, one concept per token, every reference by id, and an
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/// explicit version on the first line. Earlier versions are not read: they
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/// described different models — anchored straights with mode-tagged fits between
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/// them (1), then elements whose lengths were solved against construction lines
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/// (2) — and translating either would have meant keeping those concepts alive in
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/// the reader after they were removed from everything else.
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///
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/// Doubles go through std::to_chars/from_chars, so a round trip is exact and
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/// does not depend on the locale.
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[[nodiscard]] std::string serialize(const editor::Document& document);
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/// Returns nothing when @p text is not a version 3 document or is malformed.
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[[nodiscard]] std::optional<editor::Document> deserialize(const std::string& text);
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[[nodiscard]] std::string default_project_path();
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bool save(const editor::Document& document, const std::string& path = default_project_path());
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[[nodiscard]] std::optional<editor::Document> load(
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const std::string& path = default_project_path());
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} // namespace maj0sted::io
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