how do i fix error "the type or namespace 'IObjectTweener' could not be found"?

Questions & Answers
1

hello there,

I have been following a tutorial on how to make a chess game as I want to create a game like chess but add my own twist. When following a specific script I keep getting errors about “IObjectTweener”

Assets\Scripts\Piece.cs(5,26): error CS0246: The type or namespace name ‘IObjectTweener’ could not be found (are you missing a using directive or an assembly reference?)

Here is the script:

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

[RequireComponent(typeof(IObjectTweener))]
[RequireComponent(typeof(MaterialSetter))]
public abstract class Piece : MonoBehaviour
{
    private MaterialSetter materialSetter;

    public Board board { get; set; }

    public Vector2Int occupiedSquare { get; set; }

    public TeamColour team { get; set; }

    public bool hasMoved { get; private set; }

    public List<Vector2Int> availableMoves;

    private IObjectTweener tweener;

    public abstract List<Vector2Int> SelectAvailableSquares();

    private void Awake()
    {
        availableMoves = new List<Vector2Int>();
        tweener = GetComponent<Tweener>();
        materialSetter = GetComponent<MaterialSetter>();
        hasMoved = false;
    }

    public void SetMaterial(Material material)
    {
        materialSetter.SetSingleMaterial(material);
    }

    public bool IsFromSameTeam(Piece piece)
    {
        return team == piece.teamp;
    }

    public bool CanMoveTo(Vector2Int coords)
    {
        return availableMoves.Contains(coords);
    } 

    public virtual void MovePiece(Vector2Int coords)
    {

    }

    protected void TryToAddMove(Vector2Int coords)
    {
        availableMoves.Add(coords);
    }

    public void SetData(Vector2Int coords, TeamColour team, Board board)
    {
        this.team = team;
        occupiedSquare = coords;
        transform.position = board.CalculatePositionFromCoords(coords);
    }
}

the error occurs on line 5 and line 21:

[RequireComponent(typeof(IObjectTweener))]

private IObjectTweener tweener;

any help on this subject would be greatly appreciated, thank you!

2

unity doesn’t know what IObjectTweener is, you need to include the library it comes from, or maybe you need to add one as a component in the inspector because it’s a required component.