- A path of no length gave a joint with a vector across of NaN to the path
joined to it, on any scenery, with unevenness or not. It now has no
vector across, and so makes no joint.
- Axles no longer stray along the track. It moved vehicles against each
other, changing the distance their couplers go by.
- The bend under an axle goes straight on past the ends of a path: the
polynomial ran off on a short curved one, with a kick in the cab shake.
- A track left out of its rail run, where tracks are joined one way only,
no longer walks the whole run again on every call.
- The clatter of an axle goes by the outer axle on its side of the vehicle,
and not always by the same one, as the two can be on different tracks.
- A vertex works out the amounts once, and the foot of the ballast not at all.
Its numbers go by position, and the positions differ between a plain track
and a switch. A switch made in the style of a plain track wrote them in the
layout of the plain one, so they were read back as other values: the up and
down part as the value of the path p3-p4, and so on.
The values are now one struct with pure functions to read, write and resolve
them, which replaces eight fields and which the unit tests can reach.
Usage, before endtrack, in mm, 0-100, separated by semicolons with no
spaces:
a plain track: uneven value;up;side;cross;dip
a switch: uneven p1-p2;p3-p4;up p1-p2;side p1-p2;up p3-p4;side p3-p4
uneven 18 the value alone
uneven 18;;;25;6 with its own cross level and dip at the joints
uneven 0;;30 sideways alone
uneven 14;35 a switch, 14 on the straight path, 35 on the diverging
What's left out takes the first number, the dip goes by the up and down
one, and a path p3-p4 with no numbers of its own takes those of p1-p2.
This replaces unevenup, unevenside, unevencross and jointdip. The fields
in the editor stay, track panel, section Ride and sound.
At the end they share, the paths of a switch keep to the lower value, and
each comes to its own value along the way. Joined switches take the lowest
of the same path, a path joined to another path the lower of the two, and
a plain track comes to the value of the path it meets. See
track_uneven_doc.md.
Ends less than 20 cm apart meet in the middle with a common vector
across, which closes the cracks from coordinates that don't match in the
data, on tracks with no unevenness as well. At such a joint a switch takes
the cant of the plain track, and alike ones meet halfway: the slips on
Baltyk had steps of 0.2 degrees. The physics goes by the same cant.
Usage, optional attributes of a track entry, before endtrack:
uneven <mm> peak deviation of a rail on a 10 m chord, 0-100; normal and switch
unevenup <mm> up and down alone, instead of uneven; normal and switch
unevenside <mm> sideways alone, instead of uneven; normal and switch
unevencross <mm> cross level alone, instead of uneven; normal only
jointdip <mm> depth of the dip at rail joints, every sound distance; normal only,
default 0.4 of the up and down component
Values of uneven follow PLK Id-14 appendix 1: 6 mm is the limit at 160 km/h, 10 at 120,
18 at 80, 35 at 40; half of it for a track in a good state. Example:
uneven 18
unevencross 25
jointdip 6
endtrack
The same fields are in the editor, track panel, section Ride and sound. See
track_uneven_doc.md.
The unevenness is a displacement field over the plan of the scenery, with no random
numbers: one place strays the same every time, and joined tracks, the paths of a switch,
sleepermodel and axles at one place move together. Tracks meet at a joint at the lower of
their values. Joined switches take the lowest of theirs, the tracks joined to them come to
it, and a track with none of a component keeps the switch to its design in it. The clatter
comes from the dipping joints. Curve radius and grade for the physics stay as designed.
Tracks with it get geometry every 2 m on straights: 4x the vertices on Baltyk with all
tracks flagged, 0.2 ms more per frame on td.scn.
