[Guide] Notable Map Generation Errors

[Alp Apustaja]

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Based on the reference information, there are a few potential issues:

1. Ensure the player object’s tag is set to “Player”
2. Make sure each Terrain Chunk has:
   • A Trigger BoxCollider2D
   • A Rigidbody2D component (can be kinematic)
   • Child objects named “Right”, “Left”, “Up”, “Down”, “Right Up”, “Right Down”, “Left Up”, “Left Down”
3. In the MapController, verify that:
   • The terrainChunks list is populated
   • The player reference is set
   • The checkerRadius is set to a small value (like 0.2)
   • The terrainMask is set to the Terrain layer

Could you confirm that you’ve set up all these components exactly as described in the reference information?

• Terence

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[Hiếu Hoàng]

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I followed all the instructions in the video and checked again but still got errors

[Alp Apustaja]

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Could you provide more specific details about the errors you’re experiencing? What exact error messages are you seeing, or what specific behavior is not working as expected? The more details you can share, the better I can help diagnose the issue.

• Terence

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[Hiếu Hoàng]

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I have a problem, can you help me?

View post on imgur.com

[Alp Apustaja]

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It looks like you’re trying to share an image link for context, but I can’t view external links directly. If you could describe the issue or any error messages you’re encountering, that would be really helpful!

Additionally, please make sure to check the following:

• Are the currentChunk and targetMap references set correctly?
• Is the Rigidbody2D on the player and the chunks configured properly?
• Are you seeing any debug logs in the console when you enter the trigger area?

Let me know, and I’ll do my best to assist you!

[khang khang]

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SerializedObjectNotCreatableException: Object at index 0 is null
UnityEditor.Editor.CreateSerializedObject () (at <e1073c193ef84b1a9ad1995ac137921f>:0)
UnityEditor.Editor.GetSerializedObjectInternal () (at <e1073c193ef84b1a9ad1995ac137921f>:0)
UnityEditor.Editor.get_serializedObject () (at <e1073c193ef84b1a9ad1995ac137921f>:0)
UnityEditor.GameObjectInspector.OnEnable () (at <e1073c193ef84b1a9ad1995ac137921f>:0)

>< after i test Chunk trigger my unity crash then this erorr appear form nowhere lol, any1 have any idea what this error was?

[Alp Apustaja]

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The SerializedObjectNotCreatableException error you’re encountering typically means that there’s an issue with one of the objects or components in your Unity project. Here are some steps you could take to troubleshoot and possibly resolve the issue:

1. Check for Null References: Make sure that all references in your scripts (like currentChunk, targetMap, player, etc.) are properly assigned in the Unity Inspector. If any of these references are null, it could cause the error.

2. Inspect the GameObjects: Check the GameObjects in your scene. Sometimes, if an object is missing a required component or script, Unity may throw this error. Ensure that all required components (like Collider2D, Rigidbody2D, etc.) are present.

3. Clear the Console: Sometimes, clearing the console and restarting Unity can help reset any temporary states that might be causing the issue.

4. Reimport All Assets: Go to Assets -> Reimport All. This can fix issues related to corrupted asset files.

5. Check Custom Editor Scripts: If you have any custom editor scripts, make sure they are not causing the issue. Sometimes, errors in these scripts can lead to problems in the editor.

6. Review Recent Changes: If the issue began after a specific change, consider reverting that change to see if it resolves the issue.

7. Update Unity: Ensure that you are using a stable version of Unity. Sometimes, bugs in Unity itself can cause issues like this, so using the latest stable version may help.

8. Check Project Settings: If you recently changed any project settings or updated packages, consider resetting them to see if that resolves the issue.

9. Create a New Scene: If the problem persists, try creating a new scene and see if the error occurs there. This can help determine if it’s a problem with your current scene.

If you’ve tried these steps and are still encountering the error, providing more details about what you were doing when the crash occurred might help pinpoint the issue further.

[Ash Dreemurr]

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I’m having the issue where none of the chunks spawn at all. I was recently having the issue where chunks would only load on top of other chunks, when they should be spawning on the edges, but after the supposed bug fixing in part 2 it no longer spawns any chunks.

heres my code

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

public class MapController : MonoBehaviour
{
    public List<GameObject> terrainChunks;
    public GameObject player;
    public float checkerRadius;
    Vector3 noTerrainPosition;
    public LayerMask terrainMask;
    public GameObject currentChunk;
    PlayerMovement pm;

    void Start()
    {
        pm = FindObjectOfType<PlayerMovement>();
    }

    void Update()
    {
        ChunkChecker();
    }

    void ChunkChecker()
    {
        if (!currentChunk)
        {
            return;
        }

        if(pm.moveDir.x > 0 && pm.moveDir.y == 0)   //right
        {
            if(Physics2D.OverlapCircle(currentChunk.transform.Find("Right").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Right").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x < 0 && pm.moveDir.y == 0)   //left
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Left").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Left").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x == 0 && pm.moveDir.y > 0)   //up
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Up").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Up").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x == 0 && pm.moveDir.y < 0)   //down
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Down").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Down").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x > 0 && pm.moveDir.y > 0)   //right up
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Right Up").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Right Up").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x > 0 && pm.moveDir.y < 0)   //right down
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Right Down").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Right Down").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x < 0 && pm.moveDir.y > 0)   //left up
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Left Up").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Left Up").position;
                SpawnChunk();
            }
        }
        else if (pm.moveDir.x < 0 && pm.moveDir.y < 0)   //left down
        {
            if (Physics2D.OverlapCircle(currentChunk.transform.Find("Left Down").position, checkerRadius, terrainMask))
            {
                noTerrainPosition = currentChunk.transform.Find("Left Down").position;
                SpawnChunk();
            }
        }
    }

    void SpawnChunk()
    {
        int rand = Random.Range(0, terrainChunks.Count);
        Instantiate(terrainChunks[rand], noTerrainPosition, Quaternion.identity);
    }
}

using System.Collections;
using System.Collections.Generic;
using Unity.VisualScripting;
using UnityEngine;

public class ChunkTrigger : MonoBehaviour
{
    MapController mc;
    public GameObject targetMap;

    void Start()
    {
        mc = FindObjectOfType<MapController>();
    }
    private void OnTriggerStay2D(Collider2D col)
    {
        if (col.CompareTag("Player"))
        {
            mc.currentChunk = targetMap;
        }
    }

    private void OnTriggerExit2D(Collider2D col)
    {
        if(col.CompareTag("Player"))
        {
            if(mc.currentChunk == targetMap)
            {
                mc.currentChunk = null;
            }
        }
    }
}

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

public class PropRandomizer : MonoBehaviour
{
    public List<GameObject> propSpawnPoints;
    public List<GameObject> propPrefabs;

    void Start()
    {
        SpawnProps();
    }

    void Update()
    {

    }

    void SpawnProps()
    {
        foreach (GameObject sp in propSpawnPoints)
        {
            int rand = Random.Range(0, propPrefabs.Count);
            GameObject prop = Instantiate(propPrefabs[rand], sp.transform.position, Quaternion.identity);
            prop.transform.parent = sp.transform;
        }
    }
}

[Ash Dreemurr]

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Sigh….nevermind. Just realized the issue. I forgot the “!” in front of all of the “Physics2D.OverlapCircle” if statements. No idea how hard I’m facepalming right now. Leave it to one singular exclamation point to ruin everything…

• Terence

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[Terence]

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Sigh….nevermind. Just realized the issue. I forgot the “!” in front of all of the “Physics2D.OverlapCircle” if statements. No idea how hard I’m facepalming right now. Leave it to one singular exclamation point to ruin everything…

It happens to all of us :)

On a separate note, you may want to check this one out — we recently made an improved MapController script: https://blog.terresquall.com/community/topic/part-2-5-map-generation-on-roids-greatly-improved/

Video for this is coming soon as well.

[Alp Apustaja]

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Based on the reference information and the code provided, there are a few potential issues:

1. The if (!currentChunk) check in ChunkChecker() will prevent chunk spawning if no current chunk is set.

2. The Physics2D.OverlapCircle() check is looking for an existing chunk, but you want to spawn a chunk where there isn’t one.

3. The condition should be negated to check for the absence of a chunk.

Here’s a corrected version of the ChunkChecker() method:

void ChunkChecker()
{
    if (!currentChunk)
    {
        return;
    }

    if(pm.moveDir.x > 0 && pm.moveDir.y == 0)   //right
    {
        if(!Physics2D.OverlapCircle(currentChunk.transform.Find("Right").position, checkerRadius, terrainMask))
        {
            noTerrainPosition = currentChunk.transform.Find("Right").position;
            SpawnChunk();
        }
    }
    // Similar changes for other directions...
}

The key change is using !Physics2D.OverlapCircle() to check for the absence of a chunk at the specified position.

Would you like me to elaborate on any of these points?

[Author]

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