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Place a Warden and its patrol

A Warden is one actor, BP_Warden, plus the points it walks between. By the end of this page you have a Warden in your level walking its own route, stopping at each point to look around.

  • The enemy: Content/MPFriendslop/Blueprints/AI/Warden/BP_Warden
  • The patrol point: Content/MPFriendslop/Blueprints/AI/Warden/BP_WardenPatrolPoint

In L_Procedural, you place nothing: the generator spawns the Warden and collects its points, one BP_WardenPatrolPoint in every Normal and Passage room. Follow this page to place a Warden by hand in a map of your own.

Before you start

The Warden walks on the nav mesh. Your level needs a NavMeshBoundsVolume that covers the whole route, floor included. Press P in the viewport to see the walkable area in green.

The steps

  1. Drag BP_Warden into the level where it should start.
  2. Drag in a BP_WardenPatrolPoint for each stop of the route. Put each one on the floor, inside the green area.
  3. Rotate each point so its arrow faces what the Warden should watch. While it waits at a point, the Warden looks from side to side, about 45 degrees each way around that arrow.
  4. Select the Warden. Under Settings|Patrol, add one entry per point to Patrol Points and pick each point with the eyedropper, in walking order.
  5. Check that Enemy Data under Settings|Enemy is set. BP_Warden ships with DA_Enemy_Warden.

The Warden walks the points in order and goes back to the first after the last. Any TargetPoint works in the array: BP_WardenPatrolPoint is a TargetPoint with no logic of its own.

With Patrol Points empty, the Warden stands where you placed it until it sees or hears something.

The fields

Field Where What it does Default
Patrol Points placed BP_Warden, Settings\|Patrol The route, in walking order empty
Enemy Data BP_Warden, Settings\|Enemy The Data Asset with all the tuning DA_Enemy_Warden
Patrol Speed DA_Enemy_Warden Walking speed on the route, in cm/s 90
Patrol Wait Seconds DA_Enemy_Warden Pause at each point 2.5
Arrival Radius BP_WardenController Class Defaults, Settings\|Patrol Distance, in cm and measured flat, at which a point counts as reached 130

DA_Enemy_Warden is shared by every Warden. To give one Warden a slower or longer patrol, duplicate it, change the copy and set it in Enemy Data on that placed Warden. The other fields of the Data Asset are on the next page.

Next: Doors the Warden can open, for the doors on its patrol.

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