koobas.hobune.stream
How to detect a character is leaving a 3D world?
I have an open world 3D game where my character will run around and if he gets too close to the edges he will hear a geiger counter, his eyes will start to close & eventually start to die from the radiation. My problem is I don't know how to enclose my world in a "ring" collider to trigger my code to do this. I have seen suggestions to use ProBuilder Basic but I would hate to bring in yet another whole new asset just to solve this.
all you need to do is check the distance of the player from the center of the level. here is a 2D distance function:
public bool die;
public Vector3 center = Vector3.zero;//<-center of level here
public float ringsize = 20;//<-size of ring
float timer = 0;
void Update(){
timer += Time.deltaTime;
if(timer>1){timer-=1;
die=false;
if (distance (transform.position, center) < ringsize) {
die=true;
}}}
public float distance (Vector3 v1, Vector3 v2){
float f1 = v1.x - v2.x;
float f2 = v1.z - v2.z;
f1 *= f1;f2 *= f2;
return Mathf.Sqrt(f1+f2);}
@toddisarockstar I guess that seems simple enough. There is a Distance function between two Vectors I think. Looking at @hexagonius answer, would it be more efficient to wrap the whole thing in a sphere a check for OnTriggerExit then start to kill him ins$$anonymous$$d of doing a check every second?
i adjusted the script to check every second and change a bool for you. this certainly wont cause any preformance issues. just put this on your player and your done! ...That easy!
unity has a vector three distance function but it checks 3d distance. i gave you one for 2d. its just a bit faster to calculate distance with 2 vectors which is all you need and it will check in a ring shape ins$$anonymous$$d of a dome/sphere shape...just incase you end up with high places in your level! .
The easiest would be to use a giant sphere and react to it on OnTriggerEnter and OnTriggerExit. Or you just check the distance of the character each or every other frame from the center.
