Instantiate a prefab with random y position.

Questions & Answers
1

I have a camera following the player. Once the player reaches a specific point I instantiate a prefab just off screen. When that prefab passes through the scene, I recycle it and put it back to the front of the scene. Now I want to add a random range to the y axis, which works fine, except it only moves down, and it keeps moving down.

I have been staring at my script for hours and I just cant figure it out. Here’s my code. Please excuse the organization, I know it’s atrocious.

using UnityEngine;
using System.Collections.Generic;

public class CollectibleScript : MonoBehaviour {

public Transform prefab;
public int numberOfObjects;
public float recycleOffset;
public Vector3 startPosition;
public GameObject camera;

private float x, y, z;
private float resetX;
private float resetY;
private Vector3 nextPosition;
private Queue<Transform> objectQueue;

void Start () {
	x = PlayerController.distanceTraveled + 14f;
	y = camera.transform.position.y;
	z = -35f;
	resetX = PlayerController.distanceTraveled + 30f;
	resetY = y + Random.RandomRange (-7.5f, 5f);

	objectQueue = new Queue<Transform>(numberOfObjects);
	nextPosition = startPosition;
	for (int i = 0; i < numberOfObjects; i++) {
		Transform o = (Transform)Instantiate(prefab);
		o.localPosition = nextPosition;
		objectQueue.Enqueue(o);
	}
}

void Update () {
	startPosition = new Vector3 (x, resetY, z);
	if (objectQueue.Peek().localPosition.x + recycleOffset < PlayerController.distanceTraveled) {
		Transform o = objectQueue.Dequeue();
		o.localPosition = nextPosition;
		nextPosition.x += resetX;
		nextPosition.y += resetY;
		objectQueue.Enqueue(o);
	}
}

}

2

It doesn’t look like you’re changing resetY after Start(). Start is called only once in the lifetime of a MonoBehaviour, so to react to resetting your object, your should make a Reset() methods and call that in Start() and again when you want to reset the object.