Following

Make a group of agents follow another agent. They form up on the leader the same way a SetAgentsTarget to the leader's position would place them, and keep up with it as it moves.

Crowd->SetAgentsFollowTarget(Squad, LeaderIndex, ECrowdToolkitFormationAnchor::NearEdge);

• Anchor works like on SetAgentsTarget. Near Edge puts the front of the group against the leader, on the side the group comes from; Center puts the leader in the middle of the group.

• The group uses the current Formation → Shape, just like a normal move order.

• The group gathers toward the leader from wherever it is, so it trails a walking leader. With Near Edge it holds its ground while the leader walks into or through it, and gathers again once the leader is clear; with Center it keeps re-centring on the leader.

• Followers don't fire OnAgentsReachedGoal - there is no destination to reach.

Stopping

• ClearAgentsFollowTarget(Squad) - stop following; the agents settle where they are.
• Giving a follower a normal SetAgentsTarget also stops its follow.
• If the leader is removed, the followers stop where they are and OnAgentsLostFollowTarget fires with their indices.

GetAgentFollowTargets returns who each agent is following (-1 = nobody).

Chains

Follows can be chained: A follows B, B follows C. An order that would make a loop (C follows A) is refused and returns false.

Following an actor

Only agents can be followed. To follow a player character or any other actor, spawn one proxy agent, move it to the actor's location every tick with SetAgentPosition, and have the group follow the proxy.

The FollowExample map does exactly this with BP_FollowProxyExample: spawn one agent on BeginPlay, teleport it to the actor every Tick, and make every spawned agent follow it.