Vector3.Angle

Parameters

Description

Возвращает угол в градусах между векторами from и to.

The angle returned is always the non reflex angle between the two vectors - ie the smaller of the two possible angles between them and never greater than 180 degrees.

using UnityEngine;

public class AngleExample : MonoBehaviour
{
    public Transform     target;

    // prints "close" if the z-axis of this transform looks
    // almost towards the target

    void Update()
    {
        Vector3 targetDir = target.position - transform.position;
        float angle = Vector3.Angle(targetDir, transform.forward);

        if (angle < 5.0f)
            print("close");
    }
}