koobas.hobune.stream
How do I make a 2d bullet object move towards the players original position when it is spawned?
When the player enters a circle collier trigger, the turret object, which is a child of the enemy. Will rotate towards the player and shoot a bullet every 2 seconds. Right now, the bullets just spawn. I would like some help getting the bullets to move towards the player. NOTE: I don't want the bullet to follow the player, just to fly towards the position the player was at when it had spawned. Here is my code:
Enemy Shooting Script: public class EnemyShooting : MonoBehaviour {
public GameObject enemyBullet;
public Transform player;
public float shootTimer;
public GameObject enemyTurret;
public bool playerInRange;
public float rotateSpeed;
public GameObject enemyBarrel;
// Use this for initialization
void Start () {
playerInRange = false;
shootTimer = 2;
}
// Update is called once per frame
void Update () {
if(playerInRange == true)
{
Vector3 vectorToTarget = player.position - transform.position;
float angle = (Mathf.Atan2(vectorToTarget.y, vectorToTarget.x) * Mathf.Rad2Deg) - 90;
Quaternion q = Quaternion.AngleAxis(angle, Vector3.forward);
transform.rotation = Quaternion.Slerp(transform.rotation, q, Time.deltaTime * rotateSpeed);
shootTimer -= Time.deltaTime;
if(shootTimer <= 0)
{
EnemyShoot();
shootTimer = 2;
}
}
}
private void OnTriggerEnter2D(Collider2D collision)
{
if (collision.gameObject.CompareTag("Player"))
{
playerInRange = true;
}
}
private void OnTriggerExit2D(Collider2D collision)
{
if (collision.gameObject.CompareTag("Player"))
{
playerInRange = false;
}
}
private void EnemyShoot()
{
GameObject bulletShoot = (GameObject)Instantiate(enemyBullet, transform.position, Quaternion.identity);
}
}
Enemy Bullet Script: public class EnemyBullet : MonoBehaviour {
public int damage;
public float speed;
public Transform player;
// Use this for initialization
void Start()
{
}
// Update is called once per frame
void Update()
{
transform.position = transform.up;
}
private void OnTriggerEnter2D(Collider2D collision)
{
GameObject GO;
if (collision.gameObject.CompareTag("Player"))
{
GO = collision.gameObject;
GO.GetComponent<PlayerMovement>().playerHealthCount -= damage;
Destroy(gameObject);
}
if (collision.gameObject.CompareTag("NorthWall"))
{
Destroy(gameObject);
}
if (collision.gameObject.CompareTag("SouthWall"))
{
Destroy(gameObject);
}
if (collision.gameObject.CompareTag("EastWall"))
{
Destroy(gameObject);
}
if (collision.gameObject.CompareTag("WestWall"))
{
Destroy(gameObject);
}
}
}
Thank you for your time.
Hi, in EnemyShoot() and after instantiating the Bullet add this:
bulletShoot.GetComponent<Rigidbody2D>().velocity = (player.transform.position - transform.position).normalized * bulletSpeed;
Be sure to add a rigidbody2d to your bullet and to set its gravity scale to 0. Create also a new float called for example bulletSpeed.
To build on top of your answer, i recon it would be aesthetically pleasing to make the bullet face the same direction as the velocity, that's if the bullet's image/sprite looks like it could benefit from that (i.e not a ball).
Thank you so much! also thanks for the heads up @Tobychappell It's a ball now, but it will be changed eventually.
This is the code for the bullet to just go to the players position at the time the bullet is instantiated.
using System.Collections; using System.Collections.Generic; using UnityEngine;
public class Ship2Rocket : MonoBehaviour {
[SerializeField] GameObject explosionPrefab;
[SerializeField] float speed;
float finalSpeed;
GameObject player;
Vector3 currentPlayerPos;
void Start()
{
player = GameObject.FindGameObjectWithTag("Player");
if(player)
currentPlayerPos = player.transform.position;
finalSpeed = speed * Time.deltaTime;
}
void Update()
{
transform.LookAt(currentPlayerPos);
transform.position = Vector3.MoveTowards(transform.position, currentPlayerPos, finalSpeed);
if (transform.position == currentPlayerPos)
{
Instantiate(explosionPrefab, transform.position, Quaternion.identity);
Destroy(gameObject);
}
}
}
