optimizeWaypoints property
By default, the Directions service calculates a route through the provided waypoints in their given order.
If set to true will allow the Directions service to optimize
the provided route by rearranging the waypoints in a more
efficient order. (This optimization is an application of the
traveling salesperson problem.) Travel time is the primary
factor which is optimized, but other factors such as distance,
number of turns and many more may be taken into account when
deciding which route is the most efficient. All waypoints must
be stopovers for the Directions service to optimize their route.
If you instruct the Directions service to optimize the order of
its waypoints, their order will be returned in the waypoint_order
field within the DirectionsRoute object. The waypointOrder
field returns values which are zero-based.
Implementation
final bool? optimizeWaypoints;