Ai goal follow

Template:Hl2 point It makes the target NPCs follow another object or the player at a configurable distance. NPCs may react in some way if they can't path to their leader.

Note:NPCs do not intelligently follow their leader. They will simply walk or run depending on distance directly towards it. If the followers happen to block a path, they will not move out of the way and the leading NPC will eventually give up trying to path. (Depends on Formation.)

In code, it is represented by theCAI_FollowGoalclass, defined in theai_behavior_follow.cppfile.

ConVars/Commands

Cvar/Command	Parameters or default value	Descriptor	Effect
ai_debug_follow	0	0 disables, 1 enables	Tells when an NPC is having trouble following their leader. Requires developer 1. Does not function. [confirm]
ai_follow_use_points	1	0 disables, 1 enables	Todo: Effect description.
ai_follow_use_points_when_moving	1	0 disables, 1 enables	Todo: Effect description.

Keyvalues

Actor(s) to affect (actor) ([todo internal name (i)]) <target_name_or_class>

The name or class of the NPCs that will be following.

Target Entity (goal) ([todo internal name (i)]) <string>

The name of the entity that the NPCs should follow. If this value is blank, NPCs will follow the player, if they are friendly towards them.

Search Type (SearchType) ([todo internal name (i)]) <choices>

How to search for the entities using the name specified in the Actor(s) to affect keyvalue.

• 0: Entity Name (targetname)
• 1: Classname

Start Active (StartActive) ([todo internal name (i)]) <boolean>

Should this entity be active when the map begins?

Maximum State (MaximumState) ([todo internal name (i)]) <choices>

The maximum state for NPCs to continue following.

• 0: Idle (stop following when NPC senses danger)
• 1: Alert (stop following when combat arises)
• 2: Combat (never stop following)

Formation (Formation) ([todo internal name (i)]) <choices>

How close to the target the NPCs should follow.

• 0: Close circle
• 1: Medium Circle
• 2: Wide circle
• 3: Sidekick
• 4: Vortigaunt

Todo: What exactly do 3 and 4 do?

Inputs

OutsideTransition  (in all games since ) !FGD

Usually this is automatically done by a trigger_transition when the map changes, but it can be done manually as well. It sends the entity into a "dormant" state where it is disabled even though the entity still thinks it is active. This is done in the case that the player decides to go back to a previous map, where the entity will then become non-dormant again.

Activate

Begin the follow behavior.

Deactivate

Cease the following behavior.