public static Vector3 Slerp (Vector3 a, Vector3 b, float t);



ab 之间按大小 t 进行插值。 球形插值与线性插值(也称为“lerp”)的区别在于, 向量被视为方向而不是空间中的点。返回的向量的方向通过角度进行插值, 其 magnitudefromto 的大小之间进行插值。

参数 t 限制在范围 [0, 1] 内。

// Animates the position in an arc between sunrise and sunset.

using UnityEngine; using System.Collections;

public class ExampleClass : MonoBehaviour { public Transform sunrise; public Transform sunset;

// Time to move from sunrise to sunset position, in seconds. public float journeyTime = 1.0f;

// The time at which the animation started. private float startTime;

void Start() { // Note the time at the start of the animation. startTime = Time.time; }

void Update() { // The center of the arc Vector3 center = (sunrise.position + sunset.position) * 0.5F;

// move the center a bit downwards to make the arc vertical center -= new Vector3(0, 1, 0);

// Interpolate over the arc relative to center Vector3 riseRelCenter = sunrise.position - center; Vector3 setRelCenter = sunset.position - center;

// The fraction of the animation that has happened so far is // equal to the elapsed time divided by the desired time for // the total journey. float fracComplete = (Time.time - startTime) / journeyTime;

transform.position = Vector3.Slerp(riseRelCenter, setRelCenter, fracComplete); transform.position += center; } }