Telegram-канал r_unity3d - r/Unity3D: Unsorted - каталог телеграмм

r/Unity3D

18 January 2025 22:02

Respawn issue

Hi, I am a beginner trying to create code that will respawn the player at the last platform they were on. But for some reason when I go to a new platform, the prefab is being changed to null, because I get a message saying the prefab hasn't been assigned. My debug code tells me that the collisions are being detected with each platform.

All the platforms are sprites with RigidBody2Ds with BoxCollider2D components. They have no scripts attached to them.

Bug behavior recording

Inspector screenshot

Thank you in advance for any help or insight you can provide! Please let me know if I screwed up any etiquette -- this is my first post here.

Here is the script attached to my Player

using UnityEngine;

public class Player : MonoBehaviour
{
// Set the speed and jumping variables
public float speed = 5.0f;
public float jumpForce = 10.0f;
public float doubleJumpForce = 60.0f;
private int jumpcount = 0;

public GameObject playerPrefab; // Reference to the player prefab
public float respawnYOffset = 300f; // Vertical offset for respawning above the platform

private Rigidbody2D rb;

private GameObject lastPlatform;

void Start()
{
rb = GetComponent<Rigidbody2D>();
}

// Update is called once per frame
void Update()
{
// Check if the player has fallen off the screen
float bottomEdgeY = Camera.main.ViewportToWorldPoint(new Vector3(0.5f, 0f, Camera.main.nearClipPlane)).y;

if (transform.position.y < bottomEdgeY)
{
Debug.Log("Player fell off the screen!");
Debug.Log("Falling off. Last platform: " + (lastPlatform != null ? lastPlatform.name : "null"));
RespawnPlayer();
};

// Input movement
if (Input.GetKey(KeyCode.A))
{
transform.position += Vector3.left speed Time.deltaTime;
}
if (Input.GetKey(KeyCode.D))
{
transform.position += Vector3.right speed Time.deltaTime;
}
if (Input.GetKeyDown(KeyCode.Space) && jumpcount == 0)
{
rb.AddForce(Vector2.up jumpForce, ForceMode2D.Impulse);
jumpcount++;
}
else if (Input.GetKeyDown(KeyCode.Space) && jumpcount == 1)
{
rb.AddForce(Vector2.up doubleJumpForce, ForceMode2D.Impulse);
jumpcount = 0;
}
}

private void OnCollisionEnter2D(Collision2D collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
Debug.Log($"Collision ENTER detected with: {collision.gameObject.name}");
lastPlatform = collision.gameObject;
Debug.Log($"Last platform updated to: {lastPlatform.name}");
}
}
private void OnCollisionExit2D(Collision2D collision)
{
if (collision.gameObject.CompareTag("Ground"))
{
Debug.Log($"Collision EXIT detected with: {collision.gameObject.name}");
}
}

private void RespawnPlayer()
{
Debug.Log("playerPrefab: " + (playerPrefab != null ? "Assigned" : "Null"));
if (lastPlatform != null) // Ensure there's a valid platform to respawn on
{
// Calculate respawn position
Vector3 respawnPosition = lastPlatform.transform.position;
respawnPosition.y += respawnYOffset; // Add Y offset to spawn above the platform

// Destroy the current player GameObject (if necessary)
Destroy(gameObject);

// Instantiate a new player at the respawn position
Instantiate(playerPrefab, respawnPosition, Quaternion.identity);

Debug.Log("Player respawned at: " + respawnPosition);
}
else
{