Bridged stretches less than 5 m apart are merged into one bridge on its piers, and those shorter than 3 m, a ditch or a
culvert under the embankment, are no bridge. A bridge end within 1 m of a joint of the route or a break of the line moves to
it, so the cut leaves no sliver of a path by the abutment. Against the OpenStreetMap railway bridges the marked share stays
the same (lk91 60 of 66, TG 90 of 104); the places with nothing under them in the map fall from 6 to 4 on lk91 and from 18
to 12 on TG, and the bridge paths shorter than 1 m from 9 to 0 and from 11 to 1.
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.
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.
The name of a node or "(no name)" was written out in twenty places and
four local functions, a lower-case copy of a text in four files, the
test for a number, the file name of a template made comparable and the
heading of a direction in three and two, the green main button of a
panel in five and the key=value parameters of a self-test command in
five. Each of them is one helper now: name_of, tall_button_height and
main_button with the panel helpers, numeric with format, normalized
with the include helpers, heading_of with the plan geometry and
selftest_values with the tools; lower gives way to ToLower.
Found with an address and undefined behaviour sanitizer build, random
monkey sessions on the test sceneries and broken inputs:
- A deleted model left its pointer in the pick list of the renderer, the
bound node of the panels, the bindings of the infrastructure and the
selection: the next pick or panel frame read freed memory. The renderer
forgets it, and one erase_model does the cleaning for all the places
which deleted a model by hand.
- The plan band of a route read the vertex before the first one in the
frame a drag was let go.
- A scenery which can't be opened goes back to the launcher with the
reason in the log, a track of an unknown type or a tributary loads as
a normal track or a river with a message, and a spline with no finite
length or step gets a sane number of segments.
- Typed numbers which aren't (NaN, inf, ends 0 m or 1000 km apart, a
vector of 1e30, a diverging track part of 5 km, a curve threshold of 0,
a zero history size, radius norms below zero) are refused or clamped,
where they made the geometry run away or divide by zero.
- Folders which can't be read and file names which aren't valid in the
locale no longer throw out of the scans of sceneries, textures, sweeps,
roads and signal plates; the scans skip them.
- The launcher: Ctrl+Del with no trainset selected, a dropped vehicle
whose skin is gone and a text with a percent sign.
- A terrain mesh made for another resolution of its chunk isn't put into
the chunk, and a slot is reused only for a mesh of the same size.
- Vehicles on a track changed by the editor are moved over a copy of the
list they leave.
- The table of the keyboard shortcuts gives its stretched column a
weight, else ImGui divides 0 by 0 in the first frame of the window.
- The plot draws the ground of the terrain model (NMT) as measured, before any earthworks. The squares under the route are fetched in the background. The tooltip gives the grade line's distance from the model.
- Applying a profile lays the formation of the changed tracks anew, or reshapes the route's earthworks when there are any, so the heightmap terrain follows the new grade line. The terrain step is joined to the track step: one undo takes both back.
- In 3D and in the top view, the camera shows the part of the route the plot shows once the plot stops moving. It keeps clear of the floating plot window. A toggle turns this off.
- nmt_shape_tracks can shape only the given tracks, removing the modifiers of their paths that are gone.
Labels:
- every button, field, tooltip and message of the editor reread for a beginner: short nouns for the fields with the
sentence in the tooltip, the less used options under More settings, one glossary (field of work, template, track,
grade), sides told from directions, degrees and per mille as signs, messages built from one format string
- plural forms through STR_P; the last entry of a po file is read too, and the Polish plural rule is in the header
- lang/editor_pl.po: the code pass entries merged, 391 entries no code uses and 3 duplicates dropped
- roads: the notes and errors naming a road translated; the build options and the layout fold the texture length,
kerb sizes, traffic share, roundabout part, height over the ground and junction speed limit under More settings, the
lanes start folded
Grade lines fitted to the terrain model (NMT), a line or the whole scenery at once:
- fit_ground: a robust fit on nodes 5 m apart; the ground parting from the line (a bridge, a viaduct, a wall) is gone
past rather than followed, the bends keep off the switches as far as their curves reach, a run of bends the same way
is one point of intersection, a curve with no room is as sharp as the room lets it be
- the ends of the line and the other paths of its switches leading into lines fitted already bound the line by what
the tracks between can climb; ends meeting in the plan, laid apart in height by hand, are joined before the run
- apply_profile: the paths are split where split_path takes the parameter (a straight was cut in the wrong place, into
pieces of a few centimetres the game takes for zero length), no piece shorter than the margin; the paths off the
ends of the route are brought to its height
- Bytom: 1600 lines, grade breaks at the joints 89 -> 20; Tarnowskie Gory: 848 lines, 223 -> 3; no step over 2 cm
- Terrain work mode shows a browser of the textures folder in place of the
node bank; textures/materials can be dragged onto the palette entries
(replacing the material), the material field and the water material field
- Ctrl+Z/Ctrl+Y for heightmap terrain changes: a brush stroke or an
operation is one step of the editor history
- Ground conversion reads only the files of the terrain directives
(.txtf with origin/rotate, or .btf without text), paints the chunks with
the materials of the triangles, drops only the shapes of those files
- Fix: ground grids converted out-of-range floats to int, so whole-scene
queries returned the triangles of a single cell (shifted chunks)
- Fix: terrain layers copied from textures already uploaded without their
data stayed grey
- Fix: ImGui ID conflict between terrain tool radios and section headers
- Fix: layers of terrain .txtf files named with the scenery/ prefix and
could not be saved
- Editor selftest commands for the terrain
