refactor(editor): split the track mode into its gizmo, kept records, switch drive, switch slide and track bed files; path geometry shared in editorGeometry instead of four copies of the reversed path, track shape rules (stretching, rolls at joints, middle, switch axis, drive spot) in editor_track, fitting the track to the ground in ground_follow with the terrain query passed in, the record layer and the switch classification in the stores; long gizmo, record watch and switch slide functions broken up, out-parameters replaced by optional results

editor/editorGroundFollow.hpp

@@ -0,0 +1,47 @@
+/*
+This Source Code Form is subject to the
+terms of the Mozilla Public License, v.
+2.0. If a copy of the MPL was not
+distributed with this file, You can
+obtain one at
+http://mozilla.org/MPL/2.0/.
+*/
+
+#pragma once
+
+#include <functional>
+#include <vector>
+#include <glm/glm.hpp>
+
+#include "world/Segment.h"
+
+namespace ground_follow
+{
+
+using bed_query = std::function<std::vector<double>(std::vector<glm::dvec3> const &, std::vector<glm::dvec2> const &)>;
+
+struct ends
+{
+	double height0{0.0};
+	double grade0{0.0};
+	double height1{0.0};
+	double grade1{0.0};
+};
+
+struct knot_line
+{
+	std::vector<double> knots;
+	std::vector<double> heights;
+	std::vector<double> slopes;
+	double grade0{0.0};
+	double grade1{0.0};
+
+	void refresh();
+	void insert(double const Chainage, double const Height);
+	double at(double const Chainage, double &Grade) const;
+	bool room(double const Chainage, double const Spacing) const;
+};
+
+void follow(std::vector<segment_data> &Pieces, ends const &Ends, bed_query const &Bed);
+
+} // namespace ground_follow