The switch, with the switches joined to it, keeps its shape and one grade over its whole length: it is moved,
turned and tilted to the end of the track, and the tracks at its other ends follow it.
Canting a track at its joint with a switch cants the whole switch, its diverging path goes onto the new cone,
and the tracks joined at the other ends of the switch follow it and take the cant at their joints.
The diverging path p3-p4 takes its heights, grades at the ends and cant from the main path p1-p2 (the cone of
its cant) after every gizmo change: grade and cant rings, moving an end and editing a control vector. The tracks
joined to it follow its ends and grades. The grade ring measures along the main path and the gizmo stands in its
middle; the start vector of the diverging path slides along the main one and turns with it.
The rotate gizmo stands along the track. The cross ring changes the grade about the middle or the selected
end, the joined tracks take the grade at the joints; the ring along the track changes the cant of the track
or of the selected end, the joined tracks take it at the joints and ramp it. On a control vector the cross
ring tilts it up or down. Ctrl steps by 5 degrees, 1 per mille, 5 mm.
A regular track draws and saves only its first path; the pieces of a lengthened curve past the first
are now tracks of their own, made and dropped while dragging, taken back by one undo.
W turns the track (about its middle or the selected end) and a selection of tracks, the joined tracks follow.
E lengthens the track at its free end: a straight stays straight, an arc keeps its radius, cant and grade.
The gizmo on a control point moves, turns or lengthens the vector; the control point of the track joined
there turns with it, at a switch the vector only slides along the switch. Straight neighbours dragged along
keep their tangents and become straight again when nothing bent them.
- with nothing under the cursor the height is the mean of the ground found on the nearest ring around the point, 10 to 400 m out, plus the depth of the ballast, instead of 0; the ray of the cursor meets that height
- the ground under the cursor is looked for up to the height of the camera, not only 50 m over the last point
- with no position of the mouse the ray gave NaN and the ground under it was looked up in a grid cell out of range; the lay and drag tools keep the last cursor then, the ground is not asked about points which are not numbers
- the height along the new track is a smooth curve through points on the ground under the foot of the ballast, added where the track would hang or sink more than 0.1 m, at least 10 m apart; the paths are cut there, each joint keeps one grade on both sides
- the clicked ends and the free ends joined keep their height and grade as before; no grade limits
- self-test layclicks: how far the foot of the ballast goes over and under the ground along the paths laid
- each click of the lay tool and the end of a drag out of a free end take the height of the ground under the lower foot of the ballast plus its depth, the rails never under the ground at the axis
- heights between the clicks follow a curve which keeps the grade of the track laid from at the joint and leaves with the grade of the chord, onto a free end with the grade of that track; no grade limits
- the cursor follows the ground along its ray instead of the level of the last point
- self-test layclicks: heights of the ground and the track, grades and grade breaks at the joints
- laying, dragging out of a free end and the curve of a switch go on with the shape chosen; a straight is the straight layout on Shift+wheel, at a diverging end of a switch it also stops the crossover
- hints without Shift: straight
- the second click of the lay tool lays a straight from the first point and goes on from its end, each next click lays the shape chosen (arc then straight, straight then arc, arc through the cursor, straight) with the radius on Ctrl+wheel, as from a free end; no polyline of vertices cut into pieces of the longest path any more
- a track started on the ground and ended at a free end is the shape pulled out of that end towards the start point, one path per up to 90 degrees of arc
- hints and readout the same for both; self-test command layclicks
- the join of two free ends (a drag from one onto the other, or a click of the lay tool on it) tries in turn: a straight when the joints check can't see the kinks (half its angle), one circular arc through both ends (a piece cut out of a curve comes back as it was, its cant kept), a curve with straights where the tangents meet, a reverse curve, and only then a free Bezier curve; a curve turning more than it needs to, sharper than 10 m or longer than three chords is never taken
- the transition curves eased out of a curved neighbour only when there's room for them between the ends, never crossing each other into a loop
- cant and transition curves recommended for the radius the curve really gets, at the speed of the joined track or of the tool and never above what the radius allows; the circular arc keeps at least max(20 m, 0.4 V) between the transitions, the cant lowered to what the shortened transitions can ramp, transitions under 1 m left out
- shapes from a free end: arc then straight, straight then arc, arc through the cursor, straight; Ctrl+wheel steps the radius, Shift+wheel the shape (at a free end: the other joins), the plain wheel still zooms; a click of the lay tool from a free end lays the shape and goes on from its end
- self-test commands join, layto and joints; Polish translation
