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Assets/Plugins/Character Controller Pro/Demo/Scripts/AI/AIFollowBehaviour.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+using UnityEngine.AI;
+using Lightbug.CharacterControllerPro.Implementation;
+using Lightbug.Utilities;
+using Lightbug.CharacterControllerPro.Core;
+
+namespace Lightbug.CharacterControllerPro.Demo
+{
+
+    [AddComponentMenu("Character Controller Pro/Demo/Character/AI/Follow Behaviour")]
+    public class AIFollowBehaviour : CharacterAIBehaviour
+    {
+
+        [Tooltip("The target transform used by the follow behaviour.")]
+        [SerializeField]
+        Transform followTarget = null;
+
+        [Tooltip("Desired distance to the target. if the distance to the target is less than this value the character will not move.")]
+        [SerializeField]
+        float reachDistance = 3f;
+
+        [Tooltip("The wait time between actions updates.")]
+        [Min(0f)]
+        [SerializeField]
+        float refreshTime = 0.65f;
+
+        float timer = 0f;
+
+        NavMeshPath navMeshPath = null;
+
+        protected CharacterStateController stateController = null;
+
+        protected override void Awake()
+        {
+            base.Awake();
+
+            stateController = this.GetComponentInBranch<CharacterActor, CharacterStateController>();
+            stateController.MovementReferenceMode = MovementReferenceParameters.MovementReferenceMode.World;
+        }
+
+        void OnEnable()
+        {
+            navMeshPath = new NavMeshPath();
+            ;
+        }
+
+        public override void EnterBehaviour(float dt)
+        {
+            timer = refreshTime;
+        }
+
+        public override void UpdateBehaviour(float dt)
+        {
+            if (timer >= refreshTime)
+            {
+                timer = 0f;
+                UpdateFollowTargetBehaviour(dt);
+            }
+            else
+            {
+                timer += dt;
+            }
+
+        }
+
+        // Follow Behaviour --------------------------------------------------------------------------------------------------
+
+        /// <summary>
+        /// Sets the target to follow (only for the follow behaviour).
+        /// </summary>
+        public void SetFollowTarget(Transform followTarget, bool forceUpdate = true)
+        {
+            this.followTarget = followTarget;
+
+            if (forceUpdate)
+                timer = refreshTime + Mathf.Epsilon;
+        }
+
+        void UpdateFollowTargetBehaviour(float dt)
+        {
+            if (followTarget == null)
+                return;
+
+            characterActions.Reset();
+
+            NavMesh.CalculatePath(transform.position, followTarget.position, NavMesh.AllAreas, navMeshPath);
+
+            if (navMeshPath.corners.Length < 2)
+                return;
+
+            Vector3 path = navMeshPath.corners[1] - navMeshPath.corners[0];
+
+            bool isDirectPath = navMeshPath.corners.Length == 2;
+            if (isDirectPath && path.magnitude <= reachDistance)
+                return;
+
+
+            if (navMeshPath.corners.Length > 1)
+                SetMovementAction(path);
+
+        }
+
+
+
+    }
+
+}