Previous | Contents | Index | Next
XTrackCAD Cornu can have "track pins" added that constrain the track to pass through those points in addition to meeting the end-conditions. This allows the track to be skewed or slewed around obstacles, or to suit some other constraint.
The pins can be added when Cornus are created Section 2.1.2.6 or during Section 2.2.8 after clicking on the track. They can be selected and then Left-Drag
dragged to alter the curve shape or deleted with Delete
.
When a Cornu Track with pins is saved, it is split into two Cornu joined at the pin. If a Cornu that is joined to another Cornu is Modified with Section 2.2.8, the joints are rendered as Pins and the Modify is done for one continuous Cornu.
As you move over tracks a blue roundel will indicate the end that will be chosen with Left-Click.
Left-Click
the open endpoint of one of the two tracks being joined. A red dot within a red circle will appear at the end of the join.
Left-Drag
the endpoint to where you want it and release the button. The point will only move along the piece of track with the open endpoint (if this track type can be split) as far as the opposite end, or as an extension of that track at the selected end with the same curvature (if this track can be extended). Note that you will be able to fine-tune the end positions later.
Left-Click
the endpoint of the other track being joined. Another red dot within a circle will appear at that end of the join.
Left-Drag
the endpoint to where you want it and release the button. The second endpoint can only be moved along the second track as far as the other end (if it can be split) or as an extension beyond the end of this track (if it can be extended). The initial curve will be drawn - it will be red if the minimum radius is smaller than the minimum radius option.
Left-Click
and move it with Left-Drag
. If you drag the end point off the original track it will extend.
Left-Click
ing on it and move it with Left-Drag
. Delete
will remove the last selected Pin.
Left-Click
ing on an area of the track with no Pin or end.