Roadtypes + Tramtypes

 

I don’t want to spec the UI for this, but I’d envisage:

splitting the buttons on main toolbar, so trams have their own button

xor just put an explicit divider in the list of roadtypes / tramtypes (simpler)

 

One roadtype per tile.  

roadtypes use the road vehicle movement code.  

road vehicles can use drive-in stops (if not articulated)

road vehicles can reverse on any tile

roadtypes can optionally draw catenary

roads can be one way

 

One tramtype per tile

tramtypes use the tram movement code

trams can only use drivethrought stops

trams can only reverse where a loop is provided

tramtypes can optionally draw catenary

tram tracks cannot be one way

 

Vars on the tile (don’t check neighbouring tiles, there should be no need)

roadtype (or none)

tramtype (or none)

 

Callbacks and/or matching props:

allow building [roadtype | tramtype] on this tile, returns [allow | disallow]

draw catenary

allow towns to extend along tiles of this type

 

Tramtype will always be drawn above the roadtype.  

Where both types draw catenary, OpenTTD will draw all the catenary.  If authors don’t like this, they should detect other types by label and special case catenary accordingly.

 

Power is determined by the mapping of type label + vehicle (there is no special bit for ‘tile is powered’).