Option 1:

Define road/tramtype using different "allocate label" properties.

0x07: Allocate road label

0x08: Allocate tram label

 

RoadTypeReserveInfo:

 case 0x07: GetRoadTypeByLabel(rtl, ROADTYPE_ROAD, false);

            rt = AllocateRoadType(rtl, ROADTYPE_ROAD);

 case 0x08: GetRoadTypeByLabel(rtl, ROADTYPE_TRAM, false);

            rt = AllocateRoadType(rtl, ROADTYPE_TRAM);

 

 

Option 2:

Flag in property 0x10.

 

RoadTypeReserveInfo:

Labels are not immediately allocated, but only collected per GRF:

RoadTypeReserveInfo also collects the road/tram flag.

 

After the reservation pass, stuff are really allocated.

 

Problem: This breaks GRF loading stages, and essentially adds a second reservation stage. GRFs cannot properly test for already defined labels.

 

 

Option 3:

Separate GRF features, both with property 8

 

Advantage: (GRF feature, ID) is a key to the type, as it is to all other thing like industries.

 

 

=> Option 3 > Option 1 > Option 2