Openable Treasure chests

[Maximilien]

Hello, I would like to add openable treasure chests in the RPG game. Could you please explain me how i could do ? I m not sure at all …
I guess I have to use the IAction and the Sheduler action , setup a new type of cursor, trigger the opening , play animation. I am currently using a collector script which moves my player to a pickup before looting it, I would like to use it to reach the chest and then open it.
In a first time i will use a random dropper on it , later it would ne nice to have inventory Ui for the chest.

Thanks for your help.

[Brian_Trotter]

That’s something that’s very possible to do. Check out my futorial here: Making Inventory Containers (Banks, NPC loots, Treasure Chests)

[Maximilien]

I made it.

I would like to share with others.

First i download the free polygon chest asset on asset store and imported it into my project.

Animated Fantasy Polygon Chest | 3D Fantasy | Unity Asset Store

Drag a Prefab of one chest on scene.

1. Create a box collider on it.

2. Add the Random Dropper Script from course.

3. Add Animator ( with Right controller ans avatar from the asset )

4. Add Base stat with progression SO.

5. In The CharacterClass.cs : add Treasure Chest in the enum.

6. In the Progression SO : add a Element Treasure Chest with only one stat (health) just to have a stat level on chest.

7. Create a new Drop Library ( i named Default Chest Loot Drops ) and fill the Library to have some loots.

8. Create a new C# Script ( i named ChestOpener )

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using RPG.Control;
using RPG.Inventories;
using RPG.Combat;
using UnityEngine.Events;

namespace RPG.Core
{
    public class ChestOpener : MonoBehaviour, IRaycastable
    {
        [SerializeField] RandomDropper loot = null;
        [SerializeField] UnityEvent OnOpenChest;

        public CursorType GetCursorType()
        {
            return CursorType.Opening;
        }

        public bool HandleRaycast(PlayerController callingController)
        {
            if (loot == null)
            {
                return false;
            }
            if (Input.GetMouseButtonDown(0))
            {
                callingController.GetComponent<Opener>().Open(this.gameObject);
            }
            return true;
        }

        //Animation Event
        void OpenChest()
        {
            OnOpenChest.Invoke();
        }
    }
}

8. Add it to the Treasure Chest In Scene
9. Drag the Chest from Scene ( Hierarchy ) on Loot Field ( RandomDropper )
10. Drag the Chest from Scene ( Hierarchy ) on the OnOpenChest event.
11. In The Event, Choose RandomDropper then RandomDrop.

The Animator :

12. Select the Fantasy_Polygon_Chest_Animation_Controller , create a new state.
13. Set this state as defaut state and leave it empty.
14. Create a new parameter and name it openChest.
15. Create a transition from the new defaut state to the Fantasy_Polygon_Chest_Animation State.
16. In this transition set a condition with the Trigger openChest

Animation :

17. Click on Fantasy_Polygon_Chest_Animation and in the Animation Windows , at 3 sec , add a Event named OpenChest

Player Script to open and walk to the chest before opening :

18. Create a new c# script and name it Opener

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using RPG.Core;
using RPG.Movement;
using RPG.Inventories;

namespace RPG.Combat
{
    public class Opener : MonoBehaviour, IAction
    {
        private GameObject target = null;
        [SerializeField] AudioSource OpenClickSound = null;
        [SerializeField] GameObject[] OpenFxOnPlayer = null;
        bool hasOpen = false;

        private void Update()
        {
            if (target == null)
            {
                hasOpen = false;
                return;
            }
            if (!GetIsInRange())
            {
                //Debug.Log("!GetIsInRange was called");
                MoveToPosition(target.transform.position);
            }
            else
            {
                //Debug.Log("GetIsInRange was called");
                GetComponent<Mover>().Cancel();
                if (!hasOpen)
                {
                    OpenBehaviour();
                }
            }
        }

        public void MoveToPosition(Vector3 movePosition)
        {
            //Debug.Log("MoveToPosition was called");
            GetComponent<Mover>().MoveTo(movePosition, 1f);
        }

        public void Open(GameObject targetToOpen)
        {
            //Debug.Log("Open was called");
            GetComponent<ActionScheduler>().StartAction(this);
            target = targetToOpen;
        }

        private bool GetIsInRange()
        {
            Debug.Log("GetIsInRange was called");
            return Vector3.Distance(transform.position, target.transform.position) < 3f;
        }

        private void OpenBehaviour()
        {
            hasOpen = true;
            if (OpenClickSound != null)
            {
                OpenClickSound.Play();
            }
            if (OpenFxOnPlayer != null)
            {
                foreach (GameObject fx in OpenFxOnPlayer)
                {
                    Instantiate(fx, transform.position, transform.rotation);
                }
            }
            //Debug.Log("OpenBehaviour was called");
            target.GetComponent<Animator>().SetTrigger("openChest");
        }
        #region IAction Interface

        public void Cancel()
        {
            Debug.Log("Cancel was called");
            StopAttack();
            target = null;
            GetComponent<Mover>().Cancel();
        }

        private void StopAttack()
        {
            Debug.Log("StopAttack was called");
            GetComponent<Animator>().ResetTrigger("attack");
            GetComponent<Animator>().SetTrigger("stopAttack");
        }

        #endregion
    }
}

19. Add that script on Player and add a sound and an effect if you want.
20. edit CursorType.cs and at the end add a new line in the enum named Opening.
21. On Player Controller , add a new element for Cursor mappings and select Opening and then drag the cursor you want for opening.

I think i dont forget anything. Let me know if i missed a step, Correct me if i did mistake.

Thanks so much for these courses !

Video of my Chest :

https://youtu.be/3sWSA_rNiAc

[Brian_Trotter]

Well done!