MegaBagar/FreeCam/Assets/Scripts/BlockSpawner.cs

using System.Collections.Generic;
using UnityEngine;
using UnityEngine.InputSystem;

public class BlockSpawner : MonoBehaviour
{
    public Inventory inventory;

    public float spawnDistance = 3f;
    
    #pragma warning disable 0649
    [SerializeField] private UI_Inventory uiInventory;
    #pragma warning restore 0649
    private GameObject _blockInstance;

    private bool _isPreview;

    public void Awake()
    {
        _isPreview = false;

        inventory = new Inventory();
        uiInventory.SetInventory(inventory);
    }

    public void OnPlaceBlock ()
    {
        if (!_isPreview) return;
        // todo remove in inventory
        _blockInstance.transform.SetParent(null);
        _blockInstance = null;
        DisablePreviewMode();
    }

    public void OnTogglePreviewMode(InputValue value)
    {
        float valueAsFloat = value.Get<float>();

        if (valueAsFloat == 1f) EnablePreviewMode();
        else DisablePreviewMode();
    }

    public void OnScroll(InputValue value)
    {
        DisablePreviewMode();

        float valueAsFloat = value.Get<float>();
        if (valueAsFloat > 0) inventory.SelectPreviousItem();
        if (valueAsFloat < 0) inventory.SelectNextItem();
    }

    public void EnablePreviewMode()
    {
        Item selectedItem = inventory.GetSelectedItem();

        if (selectedItem == null) return;

        Vector3 spawnPos = Vector3.forward * spawnDistance;
        _blockInstance = Instantiate(selectedItem.Prefab, spawnPos, Quaternion.identity);
        _blockInstance.transform.SetParent(this.transform, false);
        _isPreview = true;
    }

    public void DisablePreviewMode()
    {
        if (_blockInstance != null) Destroy(_blockInstance);
        _isPreview = false;
    }
}