Route Types

The type of A3D_FindRoute and the other route natives is an A3D_ROUTE, which tells which paths a route uses and how it weighs them.

Type	Value	Paths	One way streets	Best route
A3D_ROUTE_FASTEST	0	Every road	Kept	The least time
A3D_ROUTE_SHORTEST	1	Every road	Kept	The least distance
A3D_ROUTE_ANY_WAY	2	Every road	Driven both ways	The least time
A3D_ROUTE_TRAFFIC	3	The roads the traffic of the game drives	Kept	The least time
A3D_ROUTE_BOAT	4	The lanes for boats	Sailed both ways	The least time
A3D_ROUTE_WALK	5	The paths of pedestrians, and the roads where there are none	Walked both ways	The least time

Speeds

The time of a route, which A3D_GetRouteTime gives and the routes that weigh time compare, comes from these speeds:

Path	Speed
Highway	36 metres a second, 130 km/h
Road the traffic drives	22 metres a second, 79 km/h
Road the traffic leaves alone	14 metres a second, 50 km/h
Lane for boats	15 metres a second, 54 km/h
On foot	5 metres a second, 18 km/h

A walk along a road weighs a quarter more than along a path for pedestrians, and along a highway two and a half times more, so walks keep to the paths where they can. The time still counts them at 5 metres a second.

Turns

The routes for vehicles also pay for their turns at junctions: two seconds to the right, five to the left and thirty to turn back. A3D_ROUTE_SHORTEST pays only for turning back, as 100 metres. Boats and walks turn at no cost. See Turns.

Choosing a type

• A3D_ROUTE_FASTEST is what a player driving expects from a GPS.
• A3D_ROUTE_SHORTEST suits a runner or a fare by distance, and takes small roads to save metres.
• A3D_ROUTE_ANY_WAY suits the police, the ambulance and the fire brigade.
• A3D_ROUTE_TRAFFIC suits vehicles driven by scripts, which should stay on the main roads.
• A3D_ROUTE_BOAT keeps to the water, between the lanes the boats of the game sail.
• A3D_ROUTE_WALK leads a player on foot, and with the navigation mesh from and to any point.