ソースコード
using UnityEngine; [DisallowMultipleComponent] public sealed class Example : MonoBehaviour { [SerializeField] private float m_maxSpeed; private void FixedUpdate() { var rigidbody2D = GetComponent<Rigidbody2D>(); rigidbody2D.velocity = Vector3.ClampMagnitude ( vector: rigidbody2D.velocity, maxLength: m_maxSpeed ); } }