Transport Fever is clone of Simutrans. Far-far away from Locomotion/TTD/IG2...
Pressing the control key will build only straight line and diagonals.
Not straight build question.
(see attachment plus screenshot)
I want two separate lines (1)
But unable to build, while move forward so it would be second line (red colour) - it connects to first line (orange colour).
And it is unable to build diagonal rails from beginning, first it should come 1 square straight.
(http://funkyimg.com/i/2jwX9.png)
Simutrans is field-oriented. There are no 2 tracks on a field.
Unlike OpenTTD which allows two separate diagonal rails to occupy opposite corners of a tile, Simutrans only knows 1 rail per tile. As a result diagonals need to be made of a step 2 wide which is separate for each track. The result is that diagonal track is not very space efficient, especially when dealing with a lot of separate tracks.
It does solve the upgrade problem that OpenTTD had though. Each track can be upgraded separately as opposed to both tracks in a tile having to be upgraded.