koobas.hobune.stream
Destroy Tiles That Collide With Object
Hello! Sorry to ask a question that some others have asked but I have not seemed to be able to find a solution. Here's what I have so far:
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using UnityEngine;
using UnityEngine.Tilemaps;
public class DestroyTilesOnCollision : MonoBehaviour
{
public Tilemap tilemap;
public ContactPoint2D[] contacts;
void OnTriggerEnter2D(Collider2D collision)
{
if (collision.gameObject == tilemap)
{
collision.GetContacts(contacts);
UnityEngine.Vector3 hitPosition = UnityEngine.Vector3.zero;
foreach (ContactPoint2D hit in contacts)
{
hitPosition.x = hit.point.x - 0.01f;
hitPosition.y = hit.point.y - 0.01f;
tilemap.SetTile(tilemap.WorldToCell(hitPosition), null);
}
}
}
}
Some additional information:
The way I am using this is by instantiating a game object with a circle collider 2D on it, which would then destroy the tiles it comes in contact with. (Is trigger is not enabled on the circle collider 2D since I understand that collision.GetContacts does not get any collision points if is trigger is enabled.) Other answers I have found on this subject use .contacts, but as that does not work, I believe that it has been deprecated, though I am not sure, and I know it causes a lot of memory garbage too. The documentation on .contacts says to use .GetContacts to reduce this. I replaced .contacts with setting an array to collision.GetContacts then using a foreach loop to iterate through that and disable the tiles.
Why is this not working? Any help is appreciated. Thank you!
have you tried without the world to cell ? I achieved it without it a while ago by flooring the positions according to the tilemap position.
@Tehemus Thank you, but I cannot remove the world to cell without getting an error.
tilemap.SetTile(tilemap(hitPosition), null);
Gives me this error: Non-invokable member 'DestroyTilesOnCollision.collision' cannot be used like a method.
tilemap.SetTile(hitPosition, null);
Gives me this error: Argument 1: cannot convert from 'UnityEngine.Vector3' to 'UnityEngine.Vector3Int'.
@Tehemus Got tile destruction working with this script:
using System.Collections;
using System.Collections.Generic;
using System.Numerics;
using UnityEngine;
using UnityEngine.Tilemaps;
public class DestroyTilesOnCollision : MonoBehaviour
{
//public Tilemap tilemap;
public ContactPoint2D[] contacts = new ContactPoint2D[10];
public GameObject particles;
public AudioSource explodeAndHitNoise;
void OnCollisionStay2D(Collision2D collision)
{
Debug.Log("Hit!");
if (collision.gameObject.name == "Tilemap")
{
Debug.Log("Hit tilemap!");
int contactCount = collision.contactCount;
if (contactCount > contacts.Length)
contacts = new ContactPoint2D[contactCount];
collision.GetContacts(contacts);
UnityEngine.Vector3 hitPosition = UnityEngine.Vector3.zero;
for (int i = 0; i != contactCount; ++i)
{
hitPosition.x = contacts[i].point.x;
hitPosition.y = contacts[i].point.y;
collision.gameObject.GetComponent<Tilemap>().SetTile(collision.gameObject.GetComponent<Tilemap>().WorldToCell(hitPosition), null);
var newParticles = Instantiate(particles, hitPosition, UnityEngine.Quaternion.identity);
var newSoundEffect = Instantiate(explodeAndHitNoise, this.transform.position, this.transform.rotation);
StartCoroutine(DestroyParticles(newParticles));
}
}
}
public IEnumerator DestroyParticles(GameObject particles)
{
yield return new WaitForSeconds(3f);
Destroy(particles);
}
}
A redditor helped me get this working from the script in the initial question. Here's the reddit post: https://www.reddit.com/r/Unity2D/comments/gtqkuz/help_with_destroying_tiles_on_collision/ Thanks!
