koobas.hobune.stream
Random Spawn is NOT spawing Randomly,its always at SAME location ?
Random Spawn is NOT spawing Randomly, it spawns always at SAME location ? Why is this happening?
THIS IS A 2D GAME javascript I am now getting this error and when hilited it marks the last code line around instantiate..
NullReferenceException: Object reference not set to an instance of an object
vid.Spawn () (at Assets/cook/Animations/vid.js:30
I have script attached and object name is correct im pretty sure this is an easy fix but I cant seem to find what
heres the entire code below
this is a 2d game
//var playerHealth : PlayerHealth; // Reference to the player's heatlh.
var fly : GameObject; // The enemy prefab to be spawned.
var spawnTime : float = 3f; // How long between each spawn.
var spawnPoints : Transform[]; // An array of the spawn points this enemy can spawn from.
function Start ()
{
// Call the Spawn function after a delay of the spawnTime and then continue to call after the same amount of time.
InvokeRepeating ("Spawn", spawnTime, spawnTime);
}
//function OnCollisionEnter2D(coll : Collision2D) {
// if (coll.gameObject.tag == "Enemy") {
function Spawn ()
{
/*
//if(playerHealth.currentHealth <= 0f)
// ... exit the function.
return;
}*/
// Find a random index between zero and one less than the number of spawn points.
var spawnPointIndex : int = Random.Range (0, spawnPoints.Length);
// Create an instance of the enemy prefab at the randomly selected spawn point's position and rotation.
Instantiate (fly, spawnPoints[spawnPointIndex].position, spawnPoints[spawnPointIndex].rotation);
}
I think I corrected it but want to be sure
heres what I put as of now
var fly : GameObject; // The enemy prefab to be spawned.
var spawnTime : float = 3f; // How long between each spawn.
var spawnPoints : GameObject[]; // An array of the spawn points this enemy can spawn from.
function Start ()
{
spawnPoints = GameObject.FindGameObjectsWithTag("SpawnLocations");
// Call the Spawn function after a delay of the spawnTime and then continue to call after the same amount of time.
InvokeRepeating ("Spawn", spawnTime, spawnTime);
}
function Spawn()
{
var spawnGameObject = spawnPoints[range(0,spawnPoints.Length-1)].transform;
Instantiate (fly, spawnGameObject.position, spawnGameObject.rotation);
}
I think I corrected it but want to be sure
heres what I put as of now
var fly : GameObject; // The enemy prefab to be spawned.
var spawnTime : float = 3f; // How long between each spawn.
var spawnPoints : GameObject[]; // An array of the spawn points this enemy can spawn from.
5.
function Start ()
{
spawnPoints = GameObject.FindGameObjectsWithTag("SpawnLocations");
// Call the Spawn function after a delay of the spawnTime and then continue to call after the same amount of time.
10. InvokeRepeating ("Spawn", spawnTime, spawnTime);
}
function Spawn()
15. {
var spawnGameObject = spawnPoints[range(0,spawnPoints.Length-1)].transform;
Instantiate (fly, spawnGameObject.position, spawnGameObject.rotation);
}
look at your Vid script : the size of your array is only 1 !
hi yes but the code is for a random spawning do I need even 1 of them? I assumed if I put any it will be specific
Please remember I put one in the array /elements but I then started trying without any because it is meant to be a random spawning
Please guide me in what is correct way for random spawning as my code is for
Thanks im here
Populate your array and it wont be so random. Or you can do :
Vector3 spawnPoint = new Vector3(Random.Range(-10,10), 2, Random.Range(-10,10));
where should I put this piece of code under spawn function or ? please specify
Removed as it was misinformation.
That's not the problem as the integer version of Random.Range returns values $$anonymous$$-inclusive and max-exclusive. Also if that would be the issue you wouldn't get a Null-reference exception but an index out of bounds exception.
Heh, so it does. Strange... I'm not sure what it is then.
Are you sure you don't have any null objects in your spawn points transforms array? The only other thing it might be is the fly object might be null.
when you say null you mean nothing correct? also this is a random spawning script do I have to have a spawns point transforms array?
Do I have to attach this script to the fly, or to the spawn empty gamneobject or to the background since I want a random spawn ?
I also get this error now
IndexOutOfRangeException: Array index is out of range. vid.Spawn () (at Assets/cook/Animations/vid.js:25)
There are exactly two things that can be null in line 30:
Your fly reference
One of your spawnPoints references.
So make sure, at runtime, that your script has something assigned to the fly variable and that you don't have empty / null elements in your spawnPoints array.
Keep in mind that references become null if the object that is referenced is destroyed. So make sure you check the references in the inspector at runtime. If one is null or has become null you have to find the cause of that.
I also get this error now
IndexOutOfRangeException: Array index is out of range. vid.Spawn () (at Assets/cook/Animations/vid.js:25)
please keep in $$anonymous$$d I am trying options here so I can go back n forth between settings trying to figure this out I had the spawn empty gameobj in array in the inspector then I left it empty also I tried the background as the element
I now get spawning but it is NOT RANDO$$anonymous$$ it is same locations every time
Do I have to attach this script to the fly, or to the spawn empty gamneobject or to the background since I want a random spawn ?
Also here is a screen shot of the gameobjects inspector
Again I messed with script and inspector and spawns but not randomly and always at the same location.
That's because you only have 1 transform in your spawn points array to choose from.
I just realised you're using Java, my code is C#, Here's the java version (not tested). This code should replace everything you have inside your Spawn function.
function Spawn()
{
var range : Vector3 = new Vector3(10,10,0);
var randomPosition : Vector3 = new Vector3( Random.value*range.x, Random.value*range.y, 0 ); // z is 0 because you're making a 2D game.
Instantiate (fly, randomPosition, Quaternion.Identity); // Quaternion.Identity is the same as saying 0 x, 0 y, and 0 z rotation.
}
Sorry, my initial comment had an error in it, but i corrected it, seems you got the original version though. look at my previous comment to see the correct code.
You should Instantiate flies with an empty gameObject and each flies have a script with OnTriggerEnter that calls the empty gameObject method Spawn().
I have a emty object named spawn but though tbecause this is a random script to get a random spawn I fi put it in a specific made spawn wont it spawn form there only?
heres what I have in inspector this is on the bad guy his name is fly so this scripts should be on the spawn point you think? please clarify
It seems that you don't store your spawn points in spawnPoints array. This array is empty so it's length is 0. Thus your spawnId is 0 and spawnPoints[0] is null. You should first initialize this SpawnPoints array (in Start() probably), maybe like this : spawnPoints = GameObject.FindGameObjectsWithTag("SpawnLocations"); This means you should give your SpawnPoints a tag.
PS : Or maybe you initialize this array in the inspector ?
Hi this is script I have
Can you tell me where to put it I tried placing under start function but got an error , can you copy and post the full code of these 2 ($$anonymous$$e and yours) so I can see details matter with scripting
Assets/Scripts/hy.js(19,49): BCE0022: Cannot convert 'UnityEngine.GameObject[]' to 'UnityEngine.Transform[]'.
this is code I currently have $$anonymous$$us your new part
var fly : GameObject; // The enemy prefab to be spawned.
var spawnTime : float = 3f; // How long between each spawn.
var spawnPoints : Transform[]; // An array of the spawn points this enemy can spawn from.
function Start ()
{
// Call the Spawn function after a delay of the spawnTime and then continue to call after the same amount of time.
InvokeRepeating ("Spawn", spawnTime, spawnTime);
}
{spawnPoints = GameObject.FindGameObjectsWithTag("SpawnLocations");
}
//function OnCollisionEnter2D(coll : Collision2D) {
// if (coll.gameObject.tag == "Enemy") {
function Spawn()
{
var range : Vector3 = new Vector3(10,10,0);
new Vector3( Random.value*range.x, Random.value*range.y, 0 ); // z is 0 because you're making a 2D game.
Instantiate (fly, Random.Position, Quaternion.Identity); // Quaternion.Identity is the same as saying 0 x, 0 y, and 0 z rotation.
}
the error is because your new code part mentions spawnpoints as a gameobject but I have as a transform so which is correct one I should choose?
You were going the right way ! You should read carefully the error "Cannot convert 'UnityEngine.GameObject[]' to 'UnityEngine.Transform[]'." What it means is that you have an array of GameObjects, when you need an array of Transform components (this was a mistake on my side). So you can either convert this array to transforms , or store gameObjects ins$$anonymous$$d. I wish I could show you how to do this, but I never did js before. You could store a GameObject array, and do a foreach( var go in spawnObjects) to take go.transform and put it inside spawnPoints
PS: You answered again while I was writing this , sorry
what is the difference between using gameobjects and transforms?
What ever you recommend I will try so I think you mean do as gameobjects correct , that is what I will try. I will try and get rite back to you
don't worry if you can explain to me I can do it I also wish you could show me can u record a video on your pc? a visual would really help just to cut out any mistakes
