Unity 5:如何使一个对象移动到另一个对象

Question

我想知道如何将一个对象平滑地移动到另一个对象，就像我把它扔到另一对象一样。

假设我有对象A和对象B。

我想，如果我点击对象B，那么对象A将顺利转到对象B。

我做到了：

using UnityEngine;
using System.Collections;
public class GreenEnvelope : MonoBehaviour
{
void Start()
{
    if(Input.GetMouseButton(0))
    {
        Update();
    }
}
void Update()
{
    GreenMail();
}
private void GreenMail()
{
    //the speed, in units per second, we want to move towards the target
    float speed = 40;
    float rotateSpeed = 100f;
    //move towards the center of the world (or where ever you like)
    Vector3 targetPosition = new Vector3(-23.77f, -9.719998f, 0);
    Vector3 currentPosition = this.transform.position;
    //first, check to see if we're close enough to the target
        if (Vector3.Distance(currentPosition, targetPosition) > .1f)
        {
            Vector3 directionOfTravel = targetPosition - currentPosition;
            //now normalize the direction, since we only want the direction information
            directionOfTravel.Normalize();
            //scale the movement on each axis by the directionOfTravel vector components
            this.transform.Translate(
                (directionOfTravel.x * speed * Time.deltaTime),
                (directionOfTravel.y * speed * Time.deltaTime),
                (directionOfTravel.z * speed * Time.deltaTime),
                Space.World);
            transform.Rotate(Vector3.up, rotateSpeed * Time.deltaTime);
         }
     }
}

但我必须不断点击对象才能移动。。。我必须一直点击它每帧。。。那不是我想要的。我只想点击一次"对象B"，我的"对象A"就会顺利进入"对象B"

Answer 1

1-Update方法是在每帧中运行的方法。所以你需要在更新方法中检测鼠标点击，然后调用另一个方法，比如

void Start()
{
}
void Update()
{
    if(Input.GetMouseButton(0))
    {
        // Do what ever you want
    }
}

2-此移动必须在Update方法中才能顺利进行。为此，您可以使用布尔标志。像这样：

using UnityEngine;
using System.Collections;
public class GreenEnvelope : MonoBehaviour
{
    bool isMove = false;
    float speed = 40;
    Vector3 targetPosition;
    Vector3 currentPosition;
    Vector3 directionOfTravel ;
    void Start()
    {
    }
    void Update()
    {
        if(Input.GetMouseButton(0))
        {
            isMove = true;
        }
        if (isMove == true)
        {
            GreenMail();
        }
    }
    private void GreenMail()
    {
        targetPosition = objB.transform.position; // Get position of object B
        currentPosition = this.transform.position; // Get position of object A
        directionOfTravel = targetPosition - currentPosition;
        if (Vector3.Distance(currentPosition, targetPosition) > .1f)
        {
            this.transform.Translate(
                (directionOfTravel.x * speed * Time.deltaTime),
                (directionOfTravel.y * speed * Time.deltaTime),
                (directionOfTravel.z * speed * Time.deltaTime),
                Space.World);
         }
         else
         {
             isMove = false;
         }
    }
}