Making the AI chase the player

There is a component named PawnSensing that can be used to add vision and hearing to the enemy. We will use this component and expand our Behavior Tree to make the enemy pose some threat to the player.

Giving the enemy sight with PawnSensing

To grant the enemy the ability to detect the player, we need to add the PawnSensing component to BP_EnemyController and store the PlayerCharacter reference in BB_EnemyBlackboard when the enemy sees the player.

These are the steps to use the PawnSensing component:

1. Open the BP_EnemyController Blueprint.
2. Create a variable in the My Blueprint panel. In the Details panel, name the variable PlayerKeyName and change Variable Type to Name. Compile the Blueprint and set Default Value to PlayerCharacter.
3. In the Components panel, click the Add button and search for pawn. Select the Pawn Sensing component:

Figure 9.44 – Adding the Pawn Sensing component

4. In the...