Vector3.RotateTowards

参数

返回

Vector3 RotateTowards 生成的位置。

描述

将向量 current 朝 target 旋转。

该函数类似于 MoveTowards，但向量被视为方向而不是位置。 current 向量将朝 target 方向旋转 maxRadiansDelta 的角度， 但其将准确地落在目标上而不会超过目标。 如果 current 和 target 的大小不同，则在旋转期间对结果大小进行线性插值。 如果为 maxRadiansDelta 使用负值，则向量将朝远离 target 的方向旋转， 直到它指向完全相反的方向，然后停止。


另请参阅：Quaternion.RotateTowards。

using UnityEngine;

// To use this script, attach it to the GameObject that you would like to rotate towards another game object.
// After attaching it, go to the inspector and drag the GameObject you would like to rotate towards into the target field.
// Move the target around in the scene view to see the GameObject continuously rotate towards it.
public class Example : MonoBehaviour
{
    // The target marker.
    public Transform target;

    // Angular speed in radians per sec.
    public float speed = 1.0f;

    void Update()
    {
        // Determine which direction to rotate towards
        Vector3 targetDirection = target.position - transform.position;

        // The step size is equal to speed times frame time.
        float singleStep = speed * Time.deltaTime;

        // Rotate the forward vector towards the target direction by one step
        Vector3 newDirection = Vector3.RotateTowards(transform.forward, targetDirection, singleStep, 0.0f);

        // Draw a ray pointing at our target in
        Debug.DrawRay(transform.position, newDirection, Color.red);

        // Calculate a rotation a step closer to the target and applies rotation to this object
        transform.rotation = Quaternion.LookRotation(newDirection);
    }
}