当 transform.parent 设置为 null 时游戏对象会放大

Question

我正在开发一个小游戏，将物体放入船中，然后按一下键就可以造船 "sail"。

为了移动站在船上的所有对象，我将每个对象的父对象设置为船中的空引导对象，然后更改船的位置。（我也试过将对象作为父对象放入船对象本身）

以下是应用于船对象的脚本。

在 BoatScript 中设置的变量 class:

public class BoatScript : MonoBehaviour {
    public List<string> boatList;
    public KeyCode interact;
    public GameObject tempObject;
    public string whichSide;
    public string direction;
    public bool canSail;
}

启动和更新方法：

void Start () {

    canSail = false;
    whichSide = "start";
    direction = "toFinish";
    speed = 0f;
}

void Update () {

    if (canSail == true)
    {
        SetSail();
    }

    if (boatList.Contains("FARMER") && whichSide == "start" && Input.GetKeyDown(interact))
    {
        speed = 0.5f;
        CharacterCheck();
    }
    else if (boatList.Contains("FARMER") && whichSide == "finish" && Input.GetKeyDown(interact))
    {
        speed = -0.05f;
        CharacterCheck();
    }   

}

这是我的 OnTrigger 方法：

void OnTriggerEnter(Collider other)
{
    Debug.Log(other.gameObject.name + " collided with " + gameObject.name);
    promptText.text = "";

    if(CheckValidObject(other.gameObject.name) == true) { 

        boatList.Add(other.gameObject.name);
        logBox.text = logBox.text + "\nThe " + other.gameObject.name + " is in the boat";
    }

    if (other.gameObject.name == "FARMER")
    {
        promptText2.text = "Press E to set sail";
    }

}

void OnTriggerExit(Collider other)
{
    boatList.Remove(other.gameObject.name);
    logBox.text = logBox.text + "\nThe " + other.gameObject.name + " has left the boat";
    promptText.text = "";

    if (other.gameObject.name == "FARMER")
    {
        promptText2.text = "";
    }

}

启航：

void SetSail()
{
    promptText.text = "";
    promptText2.text = "";

    addParents();

    if (whichSide == "sailing" && direction == "toFinish")
    {
        speed = 0.05f;
        gameObject.transform.Translate(speed, 0, 0);
    }
    else if (whichSide == "sailing" && direction == "toStart")
    {
        speed = -0.05f;
        gameObject.transform.Translate(speed, 0, 0);
    }
    else if (whichSide == "start" || whichSide == "finish")
    {
        gameObject.transform.Translate(speed, 0, 0);
        removeParents();
    }
}


void addParents()
{
    foreach(string o in boatList)
    {
        GameObject obj = GameObject.Find(o);
        obj.GetComponent<Rigidbody>().useGravity = false;
        obj.GetComponent<Rigidbody>().isKinematic = true;
        if (obj.name == "FARMER") { obj.transform.parent = playerGuide.transform; }
        else {obj.transform.parent = itemGuide.transform; }

    }    

}

void removeParents()
{
    foreach (string o in boatList)
    {
        GameObject obj = GameObject.Find(o);
        obj.GetComponent<Rigidbody>().useGravity = true;
        if(obj.name != "FARMER") {obj.GetComponent<Rigidbody>().isKinematic = false; }        
        obj.transform.parent = null;
    }
}

问题：一旦船到达并撞到另一侧的对撞机，船就会按预期停止，但刚从父级移除的物体开始像这样连续放大：

例如 1 https://i.gyazo.com/d35ae729757b8e71c25fd1b4a3857dae.mp4

例如 2 https://i.gyazo.com/80637919bfd114a42d187300b7faef25.mp4

我不太确定是什么原因造成的。非常感谢任何帮助，谢谢。

Answer 1

你确定它是按比例放大而不是沿 Z 轴向上移动吗？从我看来，它正朝着相机前进，但没有按比例放大。您应该调试更新方法中的位置和比例以查看那里到底发生了什么。

下方评论："Well then you will have to debug it more carefully, i would first try, setting canSail to false as soon as it reaches the end. Perhaps the method addParent which is always being executed is wrong, what does the object itemGuide does? edit: i just seen the second video, from my perspective that seems gravity, what you meant with problems with scaling up is because its moving out from the boat?"

解决方案：

void SetSail()
{
    promptText.text = "";
    promptText2.text = "";

    addParents();

    if (whichSide == "sailing" && direction == "toFinish")
    {
        speed = 0.05f;
        gameObject.transform.Translate(speed, 0, 0);
    }
    else if (whichSide == "sailing" && direction == "toStart")
    {
        speed = -0.05f;
        gameObject.transform.Translate(speed, 0, 0);
    }
    else if (whichSide == "start" || whichSide == "finish")
    {
        gameObject.transform.Translate(speed, 0, 0);
        canSail = false; //Adding this line solves the issues, must have been affecting transform properties to child objects.
        removeParents();
    }
}

Answer 2

不要通过 transform.parent 设置父级，而是使用 transform.SetParent(targetTransform, false);。第二个 bool 参数确定游戏对象的变换是否会保持其位置、方向和比例。通过将其设置为 false，变换将保持其当前值，而将其设置为 true 将修改位置、方向和比例以保持世界位置。您可以查看此以获取更多信息 transform.SetParent

当 transform.parent 设置为 null 时游戏对象会放大

Game objects scaling up when transform.parent set to null

c#

parent-child

unity3d