mirror of
https://github.com/MaSzyna-EU07/maszyna.git
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c15e200e37
The editor branch was written against headers and the PCH, both of which this
branch has done away with, so its own files were ported rather than merged: the
five headers it added are now interface units and their .cpp files module
implementation units.
- editor/{puwg1992,polandmap,turnouts,orthophoto} become eu07.editor.* modules,
application/planpanel becomes eu07.application.planpanel. The plan tool keeps
to its own module rather than joining the eu07.simcore partitions: it stands on
the editor's libraries and eu07.application.uilayer, not on the simulation core,
so :editoruilayer can export import it without a cycle.
- glm arrives by import eu07.glm, never by include, as the rest of the tree does.
maj0sted is header-only and glm-free, so its headers stay includes in the global
module fragment - every unit that names those types includes them itself, since
a global fragment is not visible across units.
- the one textual conflict was :editoruilayer's include block against this
branch's imports; resolved this branch's way plus the planpanel import.
Builds with clang 22 (-DWITH_BETTER_RENDERER=OFF) and starts into the editor on
empty ground with -editor alone.
77 lines
2.5 KiB
C++
77 lines
2.5 KiB
C++
module;
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#include <cmath>
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module eu07.editor.puwg1992;
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import eu07.glm;
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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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// PUWG 1992: a single transverse Mercator zone over the whole country, on the GRS80 ellipsoid
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double const kSemiMajor = 6378137.0;
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double const kFlattening = 1.0 / 298.257222101;
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double const kCentralMeridian = 19.0; // degrees east
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double const kScaleFactor = 0.9993;
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double const kFalseEasting = 500000.0;
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double const kFalseNorthing = -5300000.0;
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} // namespace
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glm::dvec2 puwg1992(double const Latitude, double const Longitude)
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{
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auto const e2 = 2.0 * kFlattening - kFlattening * kFlattening;
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auto const ep2 = e2 / (1.0 - e2);
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auto const lat = glm::radians(Latitude);
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auto const dlon = glm::radians(Longitude - kCentralMeridian);
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auto const sinlat = std::sin(lat);
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auto const coslat = std::cos(lat);
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auto const tanlat = std::tan(lat);
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// radius of curvature in the prime vertical, and the series terms of the standard
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// transverse Mercator expansion (Snyder); good to millimetres over a zone this size
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auto const n = kSemiMajor / std::sqrt(1.0 - e2 * sinlat * sinlat);
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auto const t = tanlat * tanlat;
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auto const c = ep2 * coslat * coslat;
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auto const a = dlon * coslat;
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// meridional arc from the equator
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auto const m =
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kSemiMajor * ((1.0 - e2 / 4.0 - 3.0 * e2 * e2 / 64.0 - 5.0 * e2 * e2 * e2 / 256.0) * lat -
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(3.0 * e2 / 8.0 + 3.0 * e2 * e2 / 32.0 + 45.0 * e2 * e2 * e2 / 1024.0) * std::sin(2.0 * lat) +
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(15.0 * e2 * e2 / 256.0 + 45.0 * e2 * e2 * e2 / 1024.0) * std::sin(4.0 * lat) -
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(35.0 * e2 * e2 * e2 / 3072.0) * std::sin(6.0 * lat));
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auto const a2 = a * a;
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auto const a3 = a2 * a;
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auto const a4 = a3 * a;
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auto const a5 = a4 * a;
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auto const a6 = a5 * a;
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auto const easting = kFalseEasting + kScaleFactor * n *
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(a + (1.0 - t + c) * a3 / 6.0 +
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(5.0 - 18.0 * t + t * t + 72.0 * c - 58.0 * ep2) * a5 / 120.0);
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auto const northing = kFalseNorthing + kScaleFactor *
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(m + n * tanlat *
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(a2 / 2.0 + (5.0 - t + 9.0 * c + 4.0 * c * c) * a4 / 24.0 +
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(61.0 - 58.0 * t + t * t + 600.0 * c - 330.0 * ep2) * a6 / 720.0));
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return {easting, northing};
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}
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} // namespace editor
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