Working magnet and crane AI

Assets/Scripts/CranePickDrop.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class CranePickDrop : MonoBehaviour
+{
+    public SlidingCrane crane;
+    public Magnet magnet;
+    public Transform dropTarget;
+
+    public Rigidbody handlingBody;
+
+    public float magnetStrength;
+
+    public enum State
+    {
+        Idle,
+        Catching,
+        Tansporting,
+        Finished,
+    }
+
+    public State state;
+
+    public void OnTriggerEnterSignalReceived(EnterTriggerSender sender)
+    {
+        var otherRb = sender.triggeredCollider.attachedRigidbody;
+
+        if (otherRb && otherRb.isKinematic == false && state == State.Idle)
+        {
+            handlingBody = otherRb;
+            state = State.Catching;
+        }
+    }
+
+    public void OnTriggerExitSignalReceived(EnterTriggerSender sender)
+    {
+        var otherRb = sender.triggeredCollider;
+    }
+
+    void Start()
+    {
+        magnetStrength = magnet.strength;
+    }
+
+    void Update()
+    {
+        if (state == State.Catching)
+        {
+            Debug.Assert(handlingBody, this);
+
+            magnet.strength = magnetStrength;
+
+            crane.testTgt = handlingBody.transform;
+            if (Vector3.Distance(handlingBody.position, magnet.transform.position) < 1f)
+            {
+                crane.testTgt = dropTarget;
+                state = State.Tansporting;
+            }
+        }
+
+        else if (state == State.Tansporting)
+        {
+            if (magnet.IsCloseToPlanar(dropTarget))
+            {
+                magnet.strength = 0;
+                state = State.Idle;
+            }
+        }
+    }
+}