koobas.hobune.stream
Spawn Random Item On Trigger Enter
I have 3 different items and a box collider. When I walk into the collider I want to be given one of the 3 items at random. When I enter the trigger I want the item I get to spawn in front of me. I'm guessing that I need to make a empty gameObject as a spawnpoint. So I need to figure out how to get a random item from the collider and have it appear at the spawnpoint. Can anyone give me any help? That would be great! Steve
You will need an array or list of your 3 items (as prefabs).
public GameObject[] itemPrefabs;
Drag your 3 items into the GameObject array in the inspector.
Then you need your trigger/spawn script
OnTriggerEnter(Collider other){
//Gonna spawn stuff
}
Might need to check if the collider is the player
if(other.tag == "Player"){
//Ok, now we spawn suff
}
You will need a spawn function. You could do this inside the trigger function but here is a standalone function..
void Spawn(){
Instantiate(itemPrefabs[Random.Range(0,itemPrefabs.Length)],transform.position, Quaternion.identity);
}
Then add a bool to see if the spawner has spawned.
bool hasSpawned = false;
Attache this to an empty gameobject or other gameObject with a trigger collider. The item will spawn at the location of the trigger when the player walks into it. Total script:
Using UnityEngine;
Using System.Collections; //for random numbers
public class itemSpawner : MonoBehaviour
{
bool hasSpawned = false;
public GameObject[] itemPrefabs;
void OnTriggerEnter(Collider other)
{
if(other.tag == "Player")
{
if(!hasSpawned)
{
hasSpawned = true;
Spawn();
}
}
}
void Spawn()
{
Instantiate(itemPrefabs[Random.Range(0,itemPrefabs.Length)],transform.position, Quaternion.identity);
}
}
Thanks for the script. When I add it in, it comes up with a few errors:
(18,60)The member 'System.Array.Length' cannot be used as method or delegate
(18,40)The best overloaded method match for 'UnityEngine.Random.Range(float, float)' has some invalid arguments
(18,40)Argument '#2' cannot convert 'object' expression to type 'float'
I also had to change the first line to:
public class itemSpawner : $$anonymous$$onoBehaviour
Otherwise it was a parcing error
I did type this on the fly, so I can accept the errors. You can use GetLength, ins$$anonymous$$d of length. And you could add an 'f' after 0, in random.range, to signify it is a float. I will make the edits to the script above. However, the logic is sound, and should work as you asked.
Don't add the f for float - it's an array, you do not want a float out of it.
Change it to:
itemPrefabs.Length
This is the correct line for Instantiate:
Instantiate(itemPrefabs[Random.Range(0,itemPrefabs.Length)],transform.position, Quaternion.identity);
fyi - in answer to 'random.range' expects two floats. Random.Range comes in 2 flavours:
The 'int' version: Random.Range(int $$anonymous$$, int max). Returns a value from $$anonymous$$ to max-1. Great for randomly choosing an index in an array.
The 'float' version: Random.Range(float $$anonymous$$, float max). Returns a floating point value from $$anonymous$$ to max. Good for randomly choosing positions and all sorts of fanciful things :)
In this line :
void Spawn(){ Instantiate(itemPrefabs[Random.Range(0,itemPrefabs.Length)],transform.position,Quaternion.identity); }
How shuld I change it if I want to transform the position to another game object that is not in the array
it can be in the array , just to make it teleport to that object
Something like this :
void Spawn(){ Instantiate(itemPrefabs[Random.Range(0,itemPrefabs.Length)],transform.position, spawner.transform.position); }
