Hello!
I started making a VERY simple NPC movement pattern between waypoints.
The thing is, it works very well. I am able to make the npc walk between them perfectly.
The trouble is when I try to make it wait between them. I read some examples about AI but whatever I do in my code doesn't seem to work. I've reorganised it several times but with no success.
I've got three waypoints in the scene in different positions. The problem, properly speaking, is that it waits some seconds when it reaches the first waypoint, it also does when reaching the second one. But the third expected wait doesn't happen. Ever.
Also , wait time seems to get affected by the variable "velocidad" (speed in english). Whenever I change it, the wait seems to be shorter (and waitForSeconds is getting a hardcoded 5.0f value so this doesn't make sense to me).
The code is the following : (ignore comments , they're in spanish, but the code is pretty straightforward). Also comprobarDistancia stands for "checkDistance" in spanish.
public class waypointer : MonoBehaviour {
// Variables privadas
private Vector3 waypointActual;
private int wpElegido;
// @ Variables Publicas
public float velocidad;
// @ Arrays
private ArrayList listaWaypoints = new ArrayList();
// @ Comportamiento
private bool walk = true;
void Start () {
// @ Agregamos las posiciones de los waypoints a la lista
GameObject[] waypoints = GameObject.FindGameObjectsWithTag ("waypoint");
foreach (GameObject waypoint in waypoints){
listaWaypoints.Add(waypoint.transform.position);
}
// @ Definimos el primer waypoint al cual dirigirse
waypointActual = (Vector3) listaWaypoints[0];
}
void Update () {
comprobarDistancia();
if (walk)
Walk ();
else {
StartCoroutine(Wait());
}
}
void Walk(){
animation.CrossFade ("walk");
moveNPCTowards (waypointActual);
}
IEnumerator Wait(){
animation.CrossFade ("idle");
yield return new WaitForSeconds (5.0f);
walk = true;
}
void comprobarDistancia(){
// Elegimos un waypoint nuevo cuando ya se acerco lo suficiente al actual
if (Vector3.Distance (transform.position, waypointActual) < 2.0f)
selectNewWaypoint();
}
void selectNewWaypoint(){
if (++wpElegido == listaWaypoints.Count) wpElegido = 0;
waypointActual = (Vector3) listaWaypoints[wpElegido];
walk = false;
}
void moveNPCTowards(Vector3 waypointActual){
// Direccion: definimos el vector direccion hacia el cual nos vamos a mover (restamos posicion objetivo - posicion nuestra)
Vector3 direccion = waypointActual - transform.position;
// Movimiento:_Son "nuevas posiciones" cada vez mas cercanas al objetivo.
// normalizar el vector es como obtener en lugar de toda la ruta, en que direccion tiene que dar "cada pequeño paso"
// al multiplicar por la velocidad, determinamos que tan "largo" es ese paso.
// usamos time.deltatime para que tenga un movimiento smooth respecto de los frames.
Vector3 movimiento = direccion.normalized * velocidad * Time.deltaTime;
transform.LookAt(waypointActual);
transform.position = transform.position + movimiento;
}
}
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