using UnityEngine;
public class Player_X : MonoBehaviour
{
[SerializeField] private Vector2 m_RayDirection = Vector2.down;
[SerializeField] private float m_RayRange = 4;
int enemyLayer;
void Start()
{
enemyLayer = LayerMask.GetMask("Enemy");
}
RaycastHit2D hit;
void Update()
{
//Move the Player back and forth across the screen, for demo
transform.position = new Vector3(Mathf.PingPong(Time.time, 4f) - 2.0f, 0, 0);
hit = Physics2D.Raycast(transform.position, m_RayDirection, m_RayRange, enemyLayer);
if (hit)
{
//Draw a debug ray to see what's happening
Debug.DrawRay(transform.position, m_RayDirection * m_RayRange, Color.green,.5f);
Debug.Log("Hit " + hit.collider.name);
//You could do other stuff here, like instantiate particles or play sounds...
//Destroy the enemy GO:
Destroy(hit.collider.gameObject);
}
}
}
Acme Nerd Games
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Here is a demo that accomplishes what you are asking.
First, the set up -- the scene consists of a player sprite and 3 enemy sprites.
The enemy sprites are assigned to the Enemy Layer. Each has a Collider2D component.
The Player sprite is similar, but it also has a custom component attached and of course is not assigned to the Enemy layer.
On to the script. First we declare a couple of handy variables with sensible default values that we can adjust later in the inspector:
[SerializeField] private Vector2 m_RayDirection = Vector2.down;
[SerializeField] private float m_RayRange = 4;
On Start, we let LayerMask do the bit-twiddling to calculate the correct mask value:
int enemyLayer;
void Start()
{
enemyLayer = LayerMask.GetMask("Enemy");
}
The fun happens in Update. First, we'll move our player from side to side, simply for demo purposes. Mathf.PingPong() is a simple way to do this.
transform.position = new Vector3(Mathf.PingPong(Time.time, 4f) - 2.0f, 0, 0);
Now, we test for a hit using the parameters we've assembled:
RaycastHit2D hit;
hit = Physics2D.Raycast(transform.position, m_RayDirection, m_RayRange, enemyLayer);
if (hit)
{
Debug.Log("Hit " + hit.collider.name);
//You could do other stuff here, like instantiate particles or play sounds...
//Destroy the enemy GO:
Destroy(hit.collider.gameObject);
}
Here's the entire script:
using UnityEngine;
public class Player_X : MonoBehaviour
{
[SerializeField] private Vector2 m_RayDirection = Vector2.down;
[SerializeField] private float m_RayRange = 4;
int enemyLayer;
void Start()
{
enemyLayer = LayerMask.GetMask("Enemy");
}
RaycastHit2D hit;
void Update()
{
//Move the Player back and forth across the screen, for demo
transform.position = new Vector3(Mathf.PingPong(Time.time, 4f) - 2.0f, 0, 0);
hit = Physics2D.Raycast(transform.position, m_RayDirection, m_RayRange, enemyLayer);
if (hit)
{
Debug.Log("Hit " + hit.collider.name);
//You could do other stuff here, like instantiate particles or play sounds...
//Destroy the enemy GO:
Destroy(hit.collider.gameObject);
}
}
}