The terrain follows the edits of the tracks with a formation only: a track with none is not shaped on its own any more, nor after the chunks made around it, and the formations are laid after a load only when the tracks are put onto the terrain or the terrain under them.
The formation of a track as it is already was taken out of the terrain when the track was shaped again, as after a change of its properties alone: the formations the tracks still have are no longer counted as gone. Selftest trackterrain pull|restore <tracks>.
The terrain under the tracks and the end of Tracks onto the terrain took every chunk along the tracks away and made it again from the model, the changes made by hand with them (79 chunks on test2). The heights while laying are kept under a key of their own, so the fitted ones chosen when they were the default are left behind; fitted stays a choice.
Fitting the grade line took 3 ms for 250 m of track, 30 ms for 1 km, 65 ms for 2 km and 200 ms for 4 km, and the preview of the lay tool and of the drag from a free end fitted it every frame, twice for the drag; on the terrain model the preview of some 800 m took 10 to 17 ms a frame, the cursor standing or not. Now the frame waits under 1.5 ms for 4 km. The formations of the tracks led into the terrain went through every chunk under them 0.3 s after each click, some 50 ms, while the cursor went on to the next point; they wait for the laying to end. The tracks laid and the terrain are the same as before.
Selftests: perf logs the longest frame and those over 33 ms, fittime the time of the fit by length, terrainhash a hash of the chunks in memory.
A deleted track whose read events or track circuit no other track took says so by the cursor, naming the signals and the circuits, and the editor keeps them for the track laid in its place, within a metre of its axis. The read of each signal goes to the piece by the signal, on the list its facing there gives, so a track laid the other way round keeps the trains reading it; the other events go to the piece at its middle, the circuit to a track lying there for the most part, a new track taking it instead of the one of the track it was made from. It happens in the step which lays the track, so Ctrl+Z takes it back and laying it again gets them again; a track which took a circuit over and is removed by another step leaves it to that step, and the events of a signal taken away stay off the tracks.
The SRK panel of a station lists what it and its lines need: signals no track reads, lines broken off where the tracks go on beyond a gap, tracks of a line of the automatic block in no block section, block sections whose tracks are gone. A row shows the place; Repair has the track by each signal read it again, as moving it does, and sets the line signals again where tracks are in no block section. A warning after an operation shows by the cursor in amber, a refusal in red as before. srkcheck counts these too, srkfix repairs, join takes the height of the ends for sceneries far above zero.
A curve laid anew, its radius changed or made compound, or a straight moved: the paths of the chain are cut again where their joints stood, set square onto the new line, each keeping its stretch of the ground, so their events, their track circuits and the cuts of the block sections stay where they were instead of being handed on along the line; the parts between the switches alike, the old even sharing kept where the joints don't follow one another along the new line.
The objects by a track taken for a change go with it by themselves: the signals and the warning discs it or its run reads, the SHP resonators by their events, and the controls of the block sections, the hectometre posts, the W17 markers and the other signs by the track nearest to them, within 12 m. They move square to the new axis keeping their offset and their turn, an object moved by hand meanwhile staying where it was put. Such a binding isn't kept in the scenery nor shown among the bound objects of the infra tool, which can still bind the object for good, and the undo and the redo take the objects back and forth with the tracks. The status of the Plan tells how many objects moved with the tracks. A path taking an object over the other way round keeps it on its side, turned as it was.
The track mode Kilometrage (X, under More) puts a point of the km where a track is clicked: the line, the km and, at a jump,
the km on from it. The axis of a line follows the main paths of the switches through the tracks of its points; on a
double-track line it runs between the tracks, and where they part on formations of their own and come together again it
runs along the longer one, the shorter one going by its own length with its last hectometre before they meet taking up
the difference (PKP GK-1 6.1.12). The km between the points are stretched to the length of the scenery evenly; the panel
lists the points with the stretch, the 3D view shows the axis, a tick at each hectometre, the points with their km and
the km of the lines by the mouse. Read the km from the posts turns the hectometre posts along the line into the points
of its km, a jump where two runs of numbers meet, and warns of a jump on a curve or at a station (Id-1 § 19). Each change
is a step of undo.
The station keeps its km and the direction of its numbering in its record. The block signals are named after their km, odd on track 1 and even on track 2, the sections after the signals at their ends, and each signal gets the control of its section.
Where the terrain model falls away under a fitted line by the abutments, the paths are cut off at the ends of the stretch as the line is applied and set to the bridge, in the same step of the history: they sound as on a bridge, get no formation and the terrain under them stays as the model has it, also after the scenery is saved and opened again. Tunnels and tracks set to the bridge already are left as they are. The status says how many paths went on a bridge.
A switch may lie on a concave vertical curve, and on a convex one no sharper than 2000 m (Dz.U. 2026 poz. 1225 § 58 ust. 16): the fit bends over the switches and their shared timbers where the ground does, a curve on a switch is a warning, and only a sharper convex one an error. A sharp crest of a hump keeps its curve off the switch zones. The zone of a crossing reaches only as far as the path crossed has rails, so the middle of a double slip keeps to itself.
A line runs through a switch along its main path, and through the quarters of a double slip straight on, so the long lines go through the slips and the connections between them are fitted after. Rails of the lines fitted already nearer than a sleeper is long are taken at their height, as both lie on the same timbers. A short line between two lines whose end grades can't be joined within the norms keeps only the heights of its ends, and the grade breaks at the joints. The norms speed of a line is the one most of its length is laid for, so a few tracks set much faster don't stiffen the curves of all of it.
The fault finder leaves out the places over the terrain model on a bridge or a viaduct, the ground falling away under them by the abutments. A formation modifier may be open at its start or end.
Laid to the norms, the readout says the design speed of the transition curves and of the cant: that of the track the laying goes on from or joins, or the one set for the laying. A new option takes the set speed also on from a track with its own, the new tracks get it; Ctrl+Shift+wheel steps it while laying and turns the option on. The panel shows the speed the laying under way is designed for.
A track laid on from a free end in the PKP PLK laying, by a drag out of the end, by clicks from it or laid back onto it, starts from the curvature and the cant the end has. An arc turning the same way as the end is a compound curve: a transition of the norms ramps the curvature and the cant from the one arc into the other. From a straight the arc gets its entry transition, the arc then straight its exit one. Where the way is too short the transitions are cut and the cant lowered to what they ramp, and the readout says so; with no room at all the track is laid as before and the note says why. The curves traced on the orthophoto and the recommended values of a compound curve get the transitions between their arcs too. The free laying stays as it was.
The free laying isn't the default any more. The first time a session opens the laying or the plan, a window asks how the
new tracks are laid, with the two cards of the panels (the norms marked as chosen); a click on one of them takes it and
closes the window, which comes before the offer of the terrain model of a new scenery. "Remember the choice, don't ask
again" keeps it in eu07_editor.ini (track_norms ask, free or plk), and a choice kept follows a later click on the cards of
the panels; the settings of the editor (General) choose between asking and either way. The self-test scripts start with the
free laying, as they were written for it.
M in any tab of the track mode turns the tape on: a click puts its start, the next one its end, at a free end, on the axis
of the track under the cursor or else on the ground. The readout at the cursor gives the distance in plan and in space,
the difference of height and the grade between them and the azimuth, while the second point follows the cursor and once
it's put; a further click starts a new measure, M or Esc puts the tape away. Self-test command tape.
In the top view at a metre a pixel or closer, each curved track of 5 m or more gets "R 600 L 120" by its middle and each
switch its name and its type from the kept switch record ("Rz 60E1-300-1:9 P") by its start, on a dark plate as on a plan.
A label which would cover another one is left out, the switches going first and then the sharper curves. View > Track labels
in the top view switches them off.
View > Track colours draws the rail tracks over the view in bands of the radius of their paths, of their speed or of the grade
along them, from above over the whole view and in the 3D view within 1.5 km of the camera, with the legend of the bands in
the bottom right corner. Plain keeps the lines of the top view as they were. Self-test command trackcolours.
Each end of a rail track joined to nothing, where a train would run off, gets a red dot next to the white dots of the joints,
in the 3D view near the camera and from above over the whole view. The ends are looked for again after an edit or once the
camera leaves the place they were found for, not every frame.
The points of a grade line read from the tracks keep the radius measured there; once a point between them was taken out, the
breaks of its neighbours changed while their radii stayed, so a break without a curve read as 0.4 per mille became one of
9 per mille with no curve, and the tracks took it as a kink. The neighbours of the point taken out follow the limits now,
with the button, Del and the self-test alike (profile_remove_point).
Applying a line with a break without a curve gave the path which ends at the break the grade of the element after it, so
its Hermite heights bowed 0.12 m off the line over 100 m before the break; each path takes the grade on its own side now.
Self-test commands vprofilerun, vprofiledel and vprofileput.
In place of a line bent every ten metres to keep within 0.1 m of every bump,
the grades and the vertical curves are fitted to the ground the way the
profile fits them. Where the formation is made in the terrain model the line
keeps to the radius of the norms and cuts and fills; over the ground left as
it is it bends as sharply as it has to. The joints keep the height and the
grade of the track joined, no grade is capped and no piece is under 5 m.
