Mathf.Clamp01

public static float Clamp01 (float value);

説明

0 と 1 の間に値を制限し、その値を返します。

using UnityEngine;

public class Example : MonoBehaviour
{
    // Set the position of the transform to be that of the time
    // but never less than 0 or more than 1

    void Update()
    {
        transform.position = new Vector3(Mathf.Clamp01(Time.time), 0, 0);
    }
}