koobas.hobune.stream
Altri
How to make an enemy 2d chasing player?
I 'm doing a 2d platform game , I need to make enemies but do not know how. the enemy shall patrol and chase the player only when the player enters in the trigger of the enemy. i'd need a script because i am noob in c#. Sorry if I have not written correctly but i'm Italian. Thank you in advance. Please, is pretty urgent!
How simple is the platformer, Is it enough if the enemy simply move left/right depending where the player is?
If so you can have a check to see if player position.x is less than enemy position.x and change the direction of the enemy accordingly. This behavior could be activated by a trigger like you said.
You obviously need to handle things like gravity, jumping and the like but I'm guessing you have a system for that?
This is a very simple approach and if you require something more complex feel free to add some more info how your game is working currently when it comes to movement.
Well @thorr57,
what about my video in Italian about this? Sure, is 3D, but the system is identical, you only have to correct the target to ensure the correct plane is used ;)
Cheers
-Pino
I have already seen some tutorials from which I got this script
using UnityEngine;
using System.Collections;
using Pathfinding;
[RequireComponent (typeof(Rigidbody2D))]
[RequireComponent (typeof(Seeker))]
public class EnemyAI1 : $$anonymous$$onoBehaviour {
public Transform target;
public float UpdateRate =2f;
private Seeker seeker;
private Rigidbody2D rb;
public Path path;
public float speed = 300f;
public Force$$anonymous$$ode2D f$$anonymous$$ode;
[HideInInspector]
public bool pathIsEnded = false;
public float nextWaypointDistance = 3;
private int currentWaypoint = 0;
void Start ()
{
seeker = GetComponent <Seeker> ();
rb = GetComponent <Rigidbody2D> ();
if (target == null)
{
Debug.LogError ("No Player found, PANIC!");
return;
}
seeker.StartPath (transform.position, target.position, OnPathComplete);
StartCoroutine (UpdatePath ());
}
IEnumerator UpdatePath (){
if (target == null)
{
//TODO: Insert a player search here.
return false;
}
seeker.StartPath (transform.position, target.position, OnPathComplete);
yield return new WaitForSeconds (1f/UpdateRate);
}
public void OnPathComplete (Path p)
{
Debug.Log ("We got a path. Did it have an error?" + p.error);
if (!p.error)
{
path = p;
currentWaypoint = 0;
}
}
void FixedUpdate ()
{
if (target== null)
{
//TODO: Insert a player search here.
return;
}
//TODO: Always look at player?
if (path == null)
return;
if (currentWaypoint > - path.vectorPath.Count)
{
if (pathIsEnded)
return;
Debug.Log ("End of path reached");
pathIsEnded = true;
return;
}
pathIsEnded = false;
Vector3 dir = (path.vectorPath [currentWaypoint] -transform.position).normalized;
dir *= speed * Time.fixedDeltaTime;
rb.AddForce (dir, f$$anonymous$$ode);
float dist = Vector3.Distance (transform.position, path.vectorPath[currentWaypoint]);
if (dist < nextWaypointDistance) {
currentWaypoint++;
return;
}
}
}
but it does not work. the console does not have errors. where is the problem? Please, help!
I would create attach a collider onto the enemy, in the shape of the region, and set it as a trigger. Then use some code like this in a script:
private bool seenPlayer = false;
void OnTiggerEnter() {
if (/* is it the player? */) seenPlayer = true;
}
void Update() {
if (seenPlayer) {
// do something
}
}
Then you would put whatever behavior you would like in place of the " // do something ". Just make sure that the player has a collider on it.
