koobas.hobune.stream
Passing variables to an instantiated object
Dear Community,
I wanted to see if there was a good solution for passing variables to an object that is instantiated. I am creating bullets this way and need to be able to pass in variables to the bullet class which define the direction, type of bullet, and so on based on the current status of the player (two player game). Here is a sample of the code I am using:
using UnityEngine; using System.Collections;
public class PlayerFire : MonoBehaviour { public GameObject bullet; // must be assigned in inspector private string playerFire;
private PlayerInfo playerInfo;
// Use this for initialization
void Start () {
playerInfo = GetComponent(typeof(PlayerInfo)) as PlayerInfo;
playerFire = playerInfo.fire;
bullet.player = "player1";
}
// Update is called once per frame
void Update () {
if (Input.GetButtonDown(playerFire))
Instantiate(bullet, transform.position, Quaternion.identity);
}
}
using UnityEngine; using System.Collections;
public class Bullet : MonoBehaviour {
float bulletSpeed = 15.0f; // speed of the bullet to travel
GameObject cam; // used to ref camera object in order to destroy bullet if it has left the camera view
Movement mover;
public string player;
BoxCollider colBox; //
Vector3 bulletPosition;
float bulletDirectionX;
float bulletDirectionY;
// Use this for initialization
void Start () {
bulletPosition = new Vector3(0, 0, 0);
mover = GameObject.Find(player).GetComponent(typeof(Movement)) as Movement;
cam = GameObject.Find("Main Camera");
colBox = GetComponent(typeof(BoxCollider)) as BoxCollider;
bulletDirectionX = mover.fireDirectionX;
bulletDirectionY = mover.fireDirectionY;
}
// Update is called once per frame
void Update () {
//move bullet
//check for collision
//check for leaving view
bulletPosition.x = bulletDirectionX*Time.deltaTime*bulletSpeed;
bulletPosition.y = bulletDirectionY*Time.deltaTime*bulletSpeed;
colBox.transform.Translate(bulletPosition);
}
void OnBecameInvisible ()
{
Destroy(gameObject);
}
void bulletDestroy()
{
Destroy(gameObject);
}
void OnCollisionEnter(Collision objHit)
{
if(objHit.gameObject.tag == "enemy" ){
Destroy(objHit.gameObject);
}
}
}
The final solution that I want to avoid is creating two bullet classes so that each player has their own and it pulls from that.
Zweegie
Instantiate returns the created object:
var newGO = Instantiate (......
So you can use GetComponent on newGO to get/set such things
Awesome! That was the solution. I had a $$anonymous$$or problem when I made this change. I got some nulls, but forgot that my player scripts needed to be updated when I made a few changes to the bullet object. I ended up going with your solution, but changed the GameObject to type Bullet and then had to drag and drop into a few different locations. The variables pass through nicely. Changed my code to this:
using UnityEngine; using System.Collections;
public class PlayerFire : $$anonymous$$onoBehaviour { public Bullet bullet; // must be assigned in inspector private string playerFire; private PlayerInfo playerInfo;
private int playerNumber; // Use this for initialization void Start () {
playerInfo = GetComponent(typeof(PlayerInfo)) as PlayerInfo;
playerFire = playerInfo.fire;
playerNumber = playerInfo.playerNumber;
}
// Update is called once per frame
void Update () {
if (Input.GetButtonDown(playerFire))
createBullet();
}
void createBullet()
{
Bullet zBullet = Instantiate(bullet, transform.position, Quaternion.identity) as Bullet;
zBullet.playerNum = playerNumber;
}
This answer worked for me. thx.
var newGO = Instantiate (...);
newGO.GetComponent<script>().publicVariable=newVal;
