[Part 2] Map Generation

[sad agent]

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Hello, im on part 2 25:20 and i did everything at map controller script improvement, but there is no more map loading anymore now. I have just the first one to appear, then no others are spawning as im moving.

ChunkTrigger script:

using System.Collections;
using System.Collections.Generic;
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;
                  }
        
            }
        
    }
}

Map Controller script:

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) //vpravo
            {
                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) //vlavo
            {
                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) //hore
            {
                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) //dole
            {
                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) //vpravo hore
            {
                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) //vpravo dole
            {
                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) //vlavo hore
            {
                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) //vlavo dole
            {
                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);

    }

}

[sad agent]

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pls help

[Terence]

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Hi sad agent, did you miss out assigning any properties on the MapController? You will need to assign the appropriate Terrain Mask, and make sure that the Checker Radius is larger than 0.

[sad agent]

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I think they are filled up correcty, and other ideas?

View post on imgur.com

[Terence]

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Try putting a Debug.Log() statement on each of the collision checks on MapController. Here’s an example:

if(pm.moveDir.x > 0 && pm.moveDir.y == 0) //vpravo
{
    if(!Physics2D.OverlapCircle(currentChunk.transform.Find("Right").position, checkerRadius, terrainMask))
    {
        Debug.Log("MapController right collision");
        noTerrainPosition = currentChunk.transform.Find("Right").position;
        SpawnChunk();

    }
}

See if the messages print.

[sad agent]

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Where should this message print? Nothing happened when I added this.

[sad agent]

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If you mean this console, then there is nothing here

View post on imgur.com

[Terence]

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If nothing happens, it means that either of the 2 lines below are the issue:

if(pm.moveDir.x > 0 && pm.moveDir.y == 0) //vpravo
{
    if(!Physics2D.OverlapCircle(currentChunk.transform.Find("Right").position, checkerRadius, terrainMask))
    {
        Debug.Log("MapController right collision");
        noTerrainPosition = currentChunk.transform.Find("Right").position;
        SpawnChunk();

    }
}

I suspect it is the 2nd highlighted line. Check if your chunk Prefabs have children GameObjects named “Right”, “Left”, “Up”, “Down” etc. The generator finds these objects and uses them to determine when a new chunk should generate.

[sad agent]

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it stopped working when i changed cords for currentChunk.transform.Find("Right").position in if(!Physics2D.OverlapCircle(currentChunk.transform.Find("Right").position, checkerRadius, terrainMask))

[Terence]

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What do you mean? Where did you change the coords? In the inspector?

[sad agent]

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No you were supposed to put actual cords in the code before instead of currentChunk.transform.Find("Right").position etc

[sad agent]

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its like new vector3(20, 20, 0) etc

[Josh]

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I had the same issue, but I figured out what my problem was.

Check that your static coordinates (“Up”, “Right”, etc) are placed properly. In my case, my chunks are 84×84, and so I had them placed right at the edges (so “Right” was at (42, 0) and “Left” was at (-42, 0)) but I had to put them at the total length (“Right” = (84, 0), “Left” = (-84, 0)).

I hope this makes sense and is helpful!

[sad agent]

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I am pretty sure I got it correctly, all the gunks are 20×20 pixels, imporing photo of “Right” static point. https://imgur.com/a/Es2et1r

[Terence]

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If I’m not wrong, your “Right” has to be right at the edge of your chunk. It’s too far away.

[Author]

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