Version: 2021.3


public static Vector2 MoveTowards (Vector2 current, Vector2 target, float maxDistanceDelta);


将点 current 移向 /target/。

这本质上与 Vector2.Lerp 相同,但是该函数确保距离不超过 maxDistanceDeltamaxDistanceDelta 为负值时会将矢量推离 /target/。

using UnityEngine;

// 2D MoveTowards example // Move the sprite to where the mouse is clicked // // Set speed to -1.0f and the sprite will move // away from the mouse click position forever

public class ExampleClass : MonoBehaviour { private float speed = 10.0f; private Vector2 target; private Vector2 position; private Camera cam;

void Start() { target = new Vector2(0.0f, 0.0f); position = gameObject.transform.position;

cam = Camera.main; }

void Update() { float step = speed * Time.deltaTime;

// move sprite towards the target location transform.position = Vector2.MoveTowards(transform.position, target, step); }

void OnGUI() { Event currentEvent = Event.current; Vector2 mousePos = new Vector2(); Vector2 point = new Vector2();

// compute where the mouse is in world space mousePos.x = currentEvent.mousePosition.x; mousePos.y = cam.pixelHeight - currentEvent.mousePosition.y; point = cam.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, 0.0f));

if (Input.GetMouseButtonDown(0)) { // set the target to the mouse click location target = point; } } }