Unity2Dで放物線の様に物体の角度を傾ける C#

Rotate Rigidbody 2D towards velocity - Unity Answers

ここにあるがUnityScriptな上、変数やパフォーマンス的に書き直し。

|cs| using UnityEngine; using System.Collections;

[RequireComponent(typeof(Rigidbody2D))] public class CannonProjectile : MonoBehaviour { public float rotateSpeed = 18.0f; private Transform myTransform; private Rigidbody2D myRigidbody2D;

// Use this for initialization
void Start ()
{
    myTransform = transform;
    myRigidbody2D = this.rigidbody2D;
}

// Update is called once per frame
void Update ()
{
    Vector2 dir = myRigidbody2D.velocity;
    float angle = Mathf.Atan2 (dir.y, dir.x) * Mathf.Rad2Deg;
    Quaternion quaternion = Quaternion.AngleAxis (angle, Vector3.forward);
    myTransform.rotation = Quaternion.RotateTowards (myTransform.rotation, quaternion, rotateSpeed * Time.deltaTime); 
}

} ||<

これでOK。

Unityではじめる2Dゲーム作り徹底ガイド スマートフォンでも遊べる本格ゲーム開発に挑戦