在 Unity3D 中控制游戏对象时传送

Question

I am a freshman design student and they've asked us to create a game on unity3D without much training on it so needless to say I don't know much except for the super basic stuff. I don't know anything about c# and I've been having an issue making a gameobject teleport. I've spent 6 hours searching for a solution online and the only conclusion I got to was that my object is probably having issues teleporting because of the way I am controlling it - something to do with the controller remembering the last position before the teleport and returning to it. I have no idea how to fix it though. So this is what my scene looks like: I have a sphere as my character, I move it to this other object that has a collider as trigger which then teleports my sphere to a different point (black object) on the terrain. As soon as my object reaches there, it starts sliding back to the point where the teleport happened. I even tried edit > project settings > physics > auto sync transforms as many suggested that and it worked for them.

This is the code by which I control my player:

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class MyPlayer : MonoBehaviour
{
    public float speed = 1;
    public float spacing = 1;
    private Vector3 pos;


    // Use this for initialization
    void Awake()
    {
        pos = transform.position;
    }

    // Update is called once per frame
    void Update()
    {
        if (Input.GetKeyDown(KeyCode.W))
            pos.x += spacing;
        if (Input.GetKeyDown(KeyCode.S))
            pos.x -= spacing;
        if (Input.GetKeyDown(KeyCode.D))
            pos.z -= spacing;
        if (Input.GetKeyDown(KeyCode.A))
            pos.z += spacing;


        transform.position = Vector3.MoveTowards(transform.position, pos, speed * Time.deltaTime);

    }
}

and I also have a camera that follows the sphere using this code

using UnityEngine;
using System.Collections;

public class CompleteCameraController : MonoBehaviour {

    public GameObject player;       //Public variable to store a reference to the player game object


    private Vector3 offset;         //Private variable to store the offset distance between the player and camera

    // Use this for initialization
    void Start () 
    {
        //Calculate and store the offset value by getting the distance between the player's position and camera's position.
        offset = transform.position - player.transform.position;
    }
    
    // LateUpdate is called after Update each frame
    void LateUpdate () 
    {
        // Set the position of the camera's transform to be the same as the player's, but offset by the calculated offset distance.
        transform.position = player.transform.position + offset;
    }
}

and I have another code on the camera that makes me be able to look around using my mouse

 using UnityEngine;
 using System.Collections;
 public class FlyCamera : MonoBehaviour
 {
     /*
     Writen by Windexglow 11-13-10.  Use it, edit it, steal it I don't care.  
     Converted to C# 27-02-13 - no credit wanted.
     Simple flycam I made, since I couldn't find any others made public.  
     Made simple to use (drag and drop, done) for regular keyboard layout  
     wasd : basic movement
     shift : Makes camera accelerate
     space : Moves camera on X and Z axis only.  So camera doesn't gain any height*/
     float mainSpeed = 700.0f; //regular speed
     float shiftAdd = 950.0f; //multiplied by how long shift is held.  Basically running
     float maxShift = 2000.0f; //Maximum speed when holdin gshift
     float camSens = 0.25f; //How sensitive it with mouse
     private Vector3 lastMouse = new Vector3(255, 255, 255); //kind of in the middle of the screen, rather than at the top (play)
     private float totalRun = 1.0f;
     void Update()
     {
         lastMouse = Input.mousePosition - lastMouse;
         lastMouse = new Vector3(-lastMouse.y * camSens, lastMouse.x * camSens, 0);
         lastMouse = new Vector3(transform.eulerAngles.x + lastMouse.x, transform.eulerAngles.y + lastMouse.y, 0);
         transform.eulerAngles = lastMouse;
         lastMouse = Input.mousePosition;
         //Mouse  camera angle done.  
         //Keyboard commands
         float f = 0.0f;
         Vector3 p = GetBaseInput();
         if (Input.GetKey(KeyCode.LeftShift))
         {
             totalRun += Time.deltaTime;
             p = p * totalRun * shiftAdd;
             p.x = Mathf.Clamp(p.x, -maxShift, maxShift);
             p.y = Mathf.Clamp(p.y, -maxShift, maxShift);
             p.z = Mathf.Clamp(p.z, -maxShift, maxShift);
         }
         else
         {
             totalRun = Mathf.Clamp(totalRun * 0.5f, 1f, 1000f);
             p = p * mainSpeed;
         }
         p = p * Time.deltaTime;
         Vector3 newPosition = transform.position;
         if (Input.GetKey(KeyCode.Space))
         { //If player wants to move on X and Z axis only
             transform.Translate(p);
             newPosition.x = transform.position.x;
             newPosition.z = transform.position.z;
             transform.position = newPosition;
         }
         else
         {
             transform.Translate(p);
         }
     }
     private Vector3 GetBaseInput()
     { //returns the basic values, if it's 0 than it's not active.
         Vector3 p_Velocity = new Vector3();
         if (Input.GetKey(KeyCode.W))
         {
             p_Velocity += new Vector3(0, 0, 1);
         }
         if (Input.GetKey(KeyCode.S))
         {
             p_Velocity += new Vector3(0, 0, -1);
         }
         if (Input.GetKey(KeyCode.A))
         {
             p_Velocity += new Vector3(-1, 0, 0);
         }
         if (Input.GetKey(KeyCode.D))
         {
             p_Velocity += new Vector3(1, 0, 0);
         }
         return p_Velocity;
     }
 }

Please let me know if there's a specific part of my code that I need to edit to resolve this or alternatively if you have a different code that won't give me this issue, that would make my life so much easier. If I need to edit something or you're sharing a code, please respond with the complete (corrected) code because otherwise I will just be even more confused.

I know this is a super long post and I am sorry but I am really desperate. It's been really hard studying online and basically having to teach myself all of this. This is for a final project so I will really appreciate any help you can throw my way. Thank you for reading and thanks for any help in advance.

EDIT: The teleport code is executing fine because I do teleport to the chosen location, I just end up sliding back to the point which I teleported from.

This is the teleporting code I am using.

using UnityEngine;
using System.Collections;

public class Teleport : MonoBehaviour
{
    public GameObject ui;
    public GameObject objToTP;
    public Transform tpLoc;
    void Start()
    {
        ui.SetActive(false);
    }

    void OnTriggerStay(Collider other)
    {
        ui.SetActive(true);
        if ((other.gameObject.tag == "Player") && Input.GetKeyDown(KeyCode.E))
        {
            objToTP.transform.position = tpLoc.transform.position;
        }
    }
    void OnTriggerExit()
    {
        ui.SetActive(false);
    }
}

Answer 1

Ok, so the main reason why your character is drifting back to original position is that the pos variable in the MyPlayer script stays the same after teleporting.

Remedy for that will be changing pos variable from Teleport script after objToTP.transform.position = tpLoc.transform.position; . Something like objToTP.gameobject.GetComponent<MyPlayer>().pos = tpLoc.transform.position ;

But make sure that objToTP has component MyPlayer and pos in MyPlayer is public.

Once again: it's a simple way to resolve your problem. In a real project you should create more flexible architecture, but that's a different story.

Answer 2

I believe that you sliding back because you moving player with transform.position = Vector3.MoveTowards in Update().
And you moving it to coordinates that was got from your input