Initial Unity prototype

Assets/Scripts/CartGrabAndPush.cs

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+using UnityEngine;
+
+public class CartGrabAndHold : MonoBehaviour
+{
+    public float holdDistance = 1.5f;     // Distance in front of player
+    public float moveSpeed = 5f;          // How fast the cart follows
+    public float floatHeight = 0.5f;      // Height above the ground to simulate wheels
+
+    private bool isHolding = false;       // Whether the cart is currently held
+    private Transform player;             // The transform of the player
+    private Rigidbody rb;                 // Cart's rigidbody
+
+    void Start()
+    {
+        rb = GetComponent<Rigidbody>();
+    }
+
+    // Called by PlayerGrabber when grabbing
+    public void GrabCart(Transform playerTransform)
+    {
+        isHolding = true;
+        player = playerTransform;
+        rb.isKinematic = true;  // Disable physics for smooth movement
+    }
+
+    // Called by PlayerGrabber when releasing
+    public void ReleaseCart()
+    {
+        isHolding = false;
+        rb.isKinematic = false; // Re-enable physics
+        player = null;
+    }
+
+    // Used by PlayerGrabber to keep cart following the player
+    public void HoldCart()
+    {
+        if (!isHolding || player == null) return;
+
+        // Target position is in front of the player on X/Z, floating above ground
+        Vector3 targetPosition = player.position + player.forward * holdDistance;
+        targetPosition.y = floatHeight;
+
+        // Smoothly move cart toward target
+        transform.position = Vector3.Lerp(transform.position, targetPosition, Time.deltaTime * moveSpeed);
+
+        // Face the same direction as the player
+        transform.rotation = Quaternion.LookRotation(player.forward);
+    }
+
+    public bool IsHolding()
+    {
+        return isHolding;
+    }
+}

Assets/Scripts/CartGrabAndPush.cs.meta

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Assets/Scripts/CartPickup.cs

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+using UnityEngine;
+
+public class CartPickup : MonoBehaviour
+{
+    public float pickupRange = 3f;
+    public Transform holdPoint; // An empty GameObject in front of player
+    private GameObject heldObject;
+    private bool isHolding = false;
+
+    void Update()
+    {
+        if (Input.GetKeyDown(KeyCode.E))
+        {
+            if (isHolding)
+            {
+                DropObject();
+            }
+            else
+            {
+                Ray ray = new Ray(Camera.main.transform.position, Camera.main.transform.forward);
+                if (Physics.Raycast(ray, out RaycastHit hit, pickupRange))
+                {
+                    if (hit.collider.CompareTag("Cart"))
+                    {
+                        PickupObject(hit.collider.gameObject);
+                    }
+                }
+            }
+        }
+
+        // Optional: Keep the cart tightly in position
+        if (isHolding && heldObject != null)
+        {
+            heldObject.transform.position = holdPoint.position;
+            heldObject.transform.rotation = holdPoint.rotation;
+        }
+    }
+
+    void PickupObject(GameObject obj)
+    {
+        heldObject = obj;
+        isHolding = true;
+        obj.GetComponent<Rigidbody>().isKinematic = true;
+        obj.transform.SetParent(holdPoint);
+        obj.transform.localPosition = Vector3.zero;
+    }
+
+    void DropObject()
+    {
+        if (heldObject != null)
+        {
+            heldObject.transform.SetParent(null);
+            heldObject.GetComponent<Rigidbody>().isKinematic = false;
+            heldObject = null;
+        }
+        isHolding = false;
+    }
+}

Assets/Scripts/CartPickup.cs.meta

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Assets/Scripts/CartReturnZone.cs

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+using UnityEngine;
+using TMPro; // Import for TextMeshPro
+
+public class CartReturnZone : MonoBehaviour
+{
+    public TMP_Text scoreText; // Reference to the TMP text
+    public AudioSource returnSound; // Sound to play when cart is returned
+    private int score = 0;
+
+    private void OnTriggerEnter(Collider other)
+    {
+        if (other.CompareTag("Cart"))
+        {
+            score++;
+            scoreText.text = "Score: " + score; // Update the TMP UI
+
+            returnSound.Play(); // Play sound when cart is returned
+
+            // Optional: Destroy the cart or move it away
+            Destroy(other.gameObject);
+        }
+    }
+}

Assets/Scripts/CartReturnZone.cs.meta

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Assets/Scripts/PlayerGrabber.cs

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+using UnityEngine;
+
+public class PlayerGrabber : MonoBehaviour
+{
+    public float grabDistance = 2f;
+    private CartGrabAndHold heldCart;
+
+    void Update()
+    {
+        if (Input.GetKeyDown(KeyCode.E))
+        {
+            if (heldCart == null)
+            {
+                TryGrabCart();
+            }
+            else
+            {
+                heldCart.ReleaseCart();
+                heldCart = null;
+            }
+        }
+
+        if (heldCart != null)
+        {
+            heldCart.HoldCart();  // Let it keep following while held
+        }
+    }
+
+    void TryGrabCart()
+    {
+        Ray ray = new Ray(transform.position, transform.forward);
+        RaycastHit hit;
+
+        if (Physics.Raycast(ray, out hit, grabDistance))
+        {
+            CartGrabAndHold cart = hit.collider.GetComponent<CartGrabAndHold>();
+            if (cart != null)
+            {
+                heldCart = cart;
+                cart.GrabCart(transform);
+            }
+        }
+    }
+}

Assets/Scripts/PlayerGrabber.cs.meta

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