動く足場の挙動をするスクリプト

MoveFloorX.cs

using UnityEngine;

public class MoveFloorX : MonoBehaviour
{
    private Vector3 initialPosition;

    void Start()
    {
        initialPosition = transform.position;
    }

    void Update()
    {
        transform.position = new Vector3(Mathf.Sin(Time.time) * 20.0f + initialPosition.x, initialPosition.y, initialPosition.z);
    }
}

MoveFloorY.cs

using UnityEngine;

public class MoveFloorY : MonoBehaviour
{
    private Vector3 initialPosition;

    void Start()
    {
        initialPosition = transform.position;
    }

    void Update()
    {
        transform.position = new Vector3(initialPosition.x, Mathf.Sin(Time.time) * 20.0f + initialPosition.y, initialPosition.z);
    }
}

MoveFloorZ.cs

using UnityEngine;

public class MoveFloorZ : MonoBehaviour
{
    private Vector3 initialPosition;

    void Start()
    {
        initialPosition = transform.position;
    }

    void Update()
    {
        transform.position = new Vector3(initialPosition.x, initialPosition.y, Mathf.Sin(Time.time) * 20.0f + initialPosition.z);
    }
}

補足

MoveFloorX.csはX軸方向の動き。

MoveFloorY.csはY軸方向の動き。

MoveFloorZ.csはZ軸方向の動き。