unity_インタラクトした際にプレイヤーが転倒する

unity初心者の備忘録。
インタラクト時にプレイヤーオブジェクトが転倒する問題の対処法。

1.プレイヤーオブジェクトのRigidbodyのConstraints（制限・制約の意）を確認する
2.【回転を固定】のXYZ軸にチェックを入れる
※【位置を固定】にチェックを入れると、階段を下りるなどの挙動の際に思った通りに動かない可能性あり。

以下、Dialoguesystemのコード全文（made Gemini）

using System.Collections;
using UnityEngine;
using UnityEngine.UI;
using TMPro;
using UnityEngine.Rendering.PostProcessing;

public class DialogueSystem : MonoBehaviour
{
public enum CharacterSpeaking
{
Player,
NPC
}

[System.Serializable]
public class DialogueLine
{
    [TextArea(3, 5)]
    public string line;
    public Sprite[] characterSprites;
    public CharacterSpeaking speakingAs;
}

public DialogueLine[] dialogueLines;
public DialogueLine[] itemDialogueLines;

public GameObject dialoguePanel;
public TMP_Text dialogueText;
public Image playerImage;
public Image npcImage;

public GameObject playerCharacter;
[SerializeField]
private PlayerMovement playerMovement;
[SerializeField]
private CameraController cameraController;
private Rigidbody playerRigidbody;

[SerializeField]
private PostProcessVolume postProcessVolume;

public KeyCode nextLineKey = KeyCode.Space;
public float typingSpeed = 0.05f;

private int currentLineIndex = 0;
private bool dialogueIsActive = false;
private Coroutine typingCoroutine;

void Start()
{
    if (playerCharacter != null)
    {
        playerMovement = playerCharacter.GetComponent<PlayerMovement>();
        playerRigidbody = playerCharacter.GetComponent<Rigidbody>();
        cameraController = FindObjectOfType<CameraController>();
    }

    if (postProcessVolume == null)
    {
        postProcessVolume = FindObjectOfType<PostProcessVolume>();
    }
    
    if (postProcessVolume != null)
    {
        postProcessVolume.weight = 0f;
    }
}

public bool IsDialogueActive()
{
    return dialogueIsActive;
}

public void OnInteract()
{
    StartDialogue();
}

public void StartDialogue()
{
    dialogueIsActive = true;
    currentLineIndex = 0;
    dialoguePanel.SetActive(true);

    if (playerRigidbody != null)
    {
        playerRigidbody.isKinematic = true;
    }

    if (playerMovement != null)
    {
        playerMovement.SetCanMove(false);
    }
    if (cameraController != null)
    {
        cameraController.SetCanLook(false);
    }
    
    if (postProcessVolume != null)
    {
        postProcessVolume.weight = 1f;
    }

    typingCoroutine = StartCoroutine(TypeLine(dialogueLines[currentLineIndex]));
}

IEnumerator TypeLine(DialogueLine line)
{
    playerImage.gameObject.SetActive(false);
    npcImage.gameObject.SetActive(false);

    if (line.speakingAs == CharacterSpeaking.Player)
    {
        if (playerImage != null && line.characterSprites.Length > 0)
        {
            playerImage.sprite = line.characterSprites[0];
            playerImage.gameObject.SetActive(true);
        }
    }
    else
    {
        if (npcImage != null && line.characterSprites.Length > 0)
        {
            npcImage.sprite = line.characterSprites[0];
            npcImage.gameObject.SetActive(true);
        }
    }

    dialogueText.text = "";
    foreach (char c in line.line.ToCharArray())
    {
        dialogueText.text += c;
        yield return new WaitForSeconds(typingSpeed);
    }
}

private void EndDialogue()
{
    dialogueIsActive = false;
    dialoguePanel.SetActive(false);
    playerImage.gameObject.SetActive(false);
    npcImage.gameObject.SetActive(false);
    
    if (playerRigidbody != null)
    {
        playerRigidbody.velocity = Vector3.zero;
        playerRigidbody.angularVelocity = Vector3.zero;

        playerCharacter.transform.rotation = Quaternion.Euler(0, playerCharacter.transform.rotation.eulerAngles.y, 0);

        playerRigidbody.isKinematic = false;
    }

    if (playerMovement != null)
    {
        playerMovement.SetCanMove(true);
    }
    if (cameraController != null)
    {
        cameraController.SetCanLook(true);
    }

    if (postProcessVolume != null)
    {
        postProcessVolume.weight = 0f;
    }
}

private void Update()
{
    if (dialogueIsActive && Input.GetKeyDown(nextLineKey))
    {
        if (typingCoroutine != null)
        {
            StopCoroutine(typingCoroutine);
            dialogueText.text = dialogueLines[currentLineIndex].line;
            typingCoroutine = null;
            return;
        }

        currentLineIndex++;
        if (currentLineIndex < dialogueLines.Length)
        {
            typingCoroutine = StartCoroutine(TypeLine(dialogueLines[currentLineIndex]));
        }
        else
        {
            EndDialogue();
        }
    }
}

}