feat(editor): the work of the editor sessions not committed yet, as it stands: a curve traced on from the end of the diverging track of a switch goes on at its radius with no transition in, or from a straight right at the switch (alignment start_held, fit_going_on), the plan taking an end adjoining R 10 km or more for a straight; the switches and slips laid into curves, slid along them and laid alone on one straight (frame_path, switch slide); the route plan reading curves going on from the tracks adjoining, the kept designs taken or forgotten; the orthophoto and terrain model settings, downloads and layers, the tracks onto the terrain; the curvature of a path in the plan (bezier::plan_curvature); the Polish texts of all of it. Not built as committed

editor/editorSwitchCurve.hpp

@@ -51,9 +51,10 @@ struct switch_report
 
 // 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
 // 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:
-// of the diverging track of the basic switch it's bent from
+// 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
+// a straight frog, the switch bent up to it as the DB bends such switches
 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,
-                    double const Ratio);
+                    double const Ratio, double const Straight = 0.0);
 
 // 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
 // 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,