koobas.hobune.stream
Moving an object to a random position between two objects
Hello,
I have a set of enemies currently moving to a set object. This object is on the far left of my game, and another object is at the far left. How could I make the enemies individually move to a random spot between these objects? This is my current code for their movement;
void Update() {
transform.position = Vector3.Lerp(startingPos, endingPos,
Mathf.SmoothStep(0f,1f, Time.time/secondsForOneLength));
}
Also, for some reason while using the above code my collider isn't applying the AddForce I've set to it. If I remove the code for their movement, it'll work just fine.
Here's the code for my collider;
void OnTriggerEnter2D(Collider2D other) {
if (other.gameObject.tag == "Enemy") {
other.GetComponent<Rigidbody2D>().AddForce(new Vector2(speed, speed));
}
}
Been struggling with this for some hours now. Any help much appreciated!
Suppose your two points are p0 and p1, use this:
Vector3 v = p1 - p0;
Vector3 target_position = p0 + Random.value * v;
v is the vector that goes from p0 to p1. By multiplying that vector with a value between 0 and 1 you choose a random point between p0 and p1.
Hmm, didn't seem to make a difference. The objects are still moving to the first target point. Here's what I have:
public Transform farEnd;
public Transform farEnd2;
void Start() {
endingPos = farEnd.position;
endingPos1 = farEnd2.position;
}
void Update() {
transform.position = Vector3.$$anonymous$$oveTowards(transform.position, endingPos, movementSpeed * Time.deltaTime);
Vector3 v = endingPos1 - endingPos;
Vector3 randomPoint = endingPos + Random.value * v;
}
You need to set the position to the new calculated vector, randomPoint.
Vector3 v = endingPos1 - endingPos;
transform.position = Vector3.$$anonymous$$oveTowards(transform.position, endingPos + Random.value * v, movementSpeed * Time.deltaTime);
Should that be fine? It's getting closer to the goal but not quite working as intended yet. The objects are going to the same area (a real small one in the middle of the x axis) and just end up shaking there next to eachother.
Your script works wonderfully! Thank you so much. Some of it goes a bit over my understanding though, would love to get some insight on the technical side if you don't $$anonymous$$d!
The GameObject we're instantiating is to create temporary "clones" out of the object we drag into the source slot, right? W
What exactly is the StartCoroutines purpose in the script and when would you want to use it in general?
Thanks again!
EDIT: Also, where should I modify their movement speed? Running into issues when I try to implement it
Yes.The GameObject we're instantiating is to create temporary "clones" out of the object we drag into the source slot, right?
When you use a Coroutine, the calling function (StartCoroutine()) returns immediately, but the Coroutine itself continues to work in the background until it's done. It makes it easier to write code that needs to do some work over a longer period of time. In this example, it slowly moves the object from one position to another, then waits 3 seconds, and then destroys the object. If you wanted to do this inside Update() you'd need several variables and flags to keep track of everything.What exactly is the StartCoroutines purpose in the script and when would you want to use it in general?
However, a Coroutine does not run in another thread, so it needs your cooperation to do its work. You need to call "yield return null;" inside the loop. This will wait one frame and then continue where it left off.
(FFS i hate this text editor. Why can't i have line breaks where i want them??)
Thanks! Really appreciate your help man.
Just a few more things..
Where should I modify their movement speed? Running into issues when I try to implement it in the script.
It seems that their movement is locked until they get to their target position. I want to be able to interrupt their movement with a collider. How could this be accomplished?
Also, where should I modify their movement speed? Running into issues when I try to implement it
StartCoroutine( $$anonymous$$oveObjectToPosition(newobject.transform, target_position, 1.0f) );
The last parameter (1.0f) is the duration in seconds. If you want the transition to be faster, just set 0.3 seconds for example.
Seems I can make it faster but not slower by modifying that number. What I noticed though, is that while their movement speed to the target doesn't change if I set it to 3f for example, but if I trigger a collider on them it'll take 3 seconds for it to activate.
The Coroutine doesn't know anything about colliders or anything else happening "outside". It just updates the object's position until it's done. If you want to abort it, you have two options:
a) Add an "abort" flag to the script that you set when a collision or anything else occurs. And inside the coroutine you check the flag and exit when it's set.
b) Just call StopAllCoroutines() which will stop the Coroutine immediately
Got it working as I hoped for :) thanks again for your help, would've been stuck with this for a long time if it wasn't for you! Learned many new things too.
