c# - 将光标限制在我的播放器周围的半径范围内

Question

我目前正在开发一款多人射击游戏。基本上 atm 你扮演一个立方体，你的手(红色方 block )跟随光标在游戏中。

我想将光标移动限制在我的玩家 Sprite 周围的一个完美圆圈内。

详见附图。

https://imgur.com/TLliade

以下脚本附在“手”(红色方 block )上。

public class Handscript : MonoBehaviour
{

    void Update()
    {
        Cursor.visible = false;

        Vector3 a = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0));
        a.Set(a.x, a.y, transform.position.z);
        transform.position = Vector3.Lerp(transform.position, a, 1f);
    }
}

现在我想限制光标在我的半径内移动，这是一个附加到我的 Player 预制件的公共(public)变换，如下所示:

    //Hand radius
    public float radius;
    public Transform centerRadius;

我很难坚持，而且对整体编码还很陌生，我可以朝着正确的方向努力。

如果我不清楚，这里基本上会问同样的问题: https://answers.unity.com/questions/1439356/limit-mouse-movement-around-player.html

编辑:我最终的目标是让手部 Action 与传说中的“Madness Interactive”游戏相似，可在此处找到: https://www.newgrounds.com/portal/view/118826

EDIT2:可能无法将光标锁定在半径圆内。是否可以将游戏对象“手”锁定在此半径内？

EDIT3:这是我使用的代码，它就像一个魅力:

using System;
using UnityEngine;

public class Handscript : Photon.MonoBehaviour
{
    [SerializeField] private GameObject Player2;        //Drag your player game object here for its position
    [SerializeField] private float radius;              //Set radius here

    public new PhotonView photonView;                   //Never mind this if its not a photon project

    private void Start()
    {
        Cursor.visible = false;
    }

    void Update()
    {
            if (photonView.isMine)      //Never mind this if statement if it isnt a photon project
            {
                Vector3 cursorPos = Camera.main.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y, 0));
                Vector3 playerPos = Player2.transform.position;

                Vector3 playerToCursor = cursorPos - playerPos;
                Vector3 dir = playerToCursor.normalized;
                Vector3 cursorVector = dir * radius;

                if (playerToCursor.magnitude < cursorVector.magnitude) // detect if mouse is in inner radius
                    cursorVector = playerToCursor;

                transform.position = playerPos + cursorVector;

            }
    }




#if UNITY_EDITOR
    private void OnDrawGizmosSelected()
    {
        UnityEditor.Handles.DrawWireDisc(transform.parent.position, Vector3.back, radius); // draw radius
    }
#endif
}

Answer 1

1. 获取从玩家到光标的向量:

   Vector3 playerToCursor = cursorPos - playerPos;
   

2. 对其进行归一化以获得方向:

   Vector3 dir = playerToCursor.normalized;
   

3. 将方向乘以所需的半径:

   Vector3 cursorVector = dir * radius;
   

4. 将游标向量添加到玩家位置得到最终位置:

   Vector3 finalPos = playerPos + cursorVector;