Shoot a Bullet in player direction Unity

Question

I'm trying to shot a bullet in player direction but the bullet is instatiated but dont leave the initial position, not sure why, heres the code:

using UnityEngine;
using System.Collections;

public class AtackPlayer : MonoBehaviour {
    public string playerTag = "Player";
    public AnimationClip startAtack;
    public AnimationClip endAtack;
    public float atackInterval = 2f;

    public GameObject enemyBullet;
    public float bulletSpeed = 20f;

    private Animator _anim;
    private Transform _transform;

    // Use this for initialization
    void Start () {
        _anim = GetComponentInParent<Animator>();
        _transform = GetComponent<Transform>();
    }
    private IEnumerator Atack(Vector2 playerPosition)
    {
        _anim.Play(startAtack.name);
        yield return new WaitForSeconds(startAtack.length); // executa o clipe e ataca
        GameObject thisBullet = Instantiate(enemyBullet, _transform.position, Quaternion.identity) as GameObject; //instancia o bullet prefab
        thisBullet.transform.position = Vector2.Lerp(thisBullet.transform.position, playerPosition, bulletSpeed * Time.deltaTime);
        _anim.Play(endAtack.name);
        yield return new WaitForSeconds(endAtack.length); // executa o clipe de finalização do ataque
        yield return new WaitForSeconds(atackInterval); // executa o clipe de finalização do ataque
    }
    // Update is called once per frame
    void Update () {


    }
    void OnTriggerEnter2D(Collider2D player)
    {
        if (player.gameObject.tag == playerTag)
        {
            Vector2 playerPos = player.transform.position;
            StartCoroutine(Atack(playerPos));
        }
    }
}

The bullet prefab have a rigidbody2d and a circle collider, also sprite renderer and a animator to handle its animation.

Any help?

Maybe the bullet believes in peace, love, and understanding. — B. Clay Shannon
I think its because you never told it to leave the initial position. — maksymiuk
the initial position is in the line: thisBullet.transform.position = Vector2.Lerp(thisBullet.transform.position, playerPosition, bulletSpeed * Time.deltaTime); — Paulo José Oliveira Rosa

Burak Karasoy Burak Karasoy · Accepted Answer · 2015-12-08T22:27:08

thisBullet.transform.position = Vector2.Lerp(thisBullet.transform.position, playerPosition, bulletSpeed * Time.deltaTime);

t = bulletSpeed * Time.deltaTime When t = 0 returns a. When t = 1 returns b. When t = 0.5 returns the point midway between a and b.

In your game probably t has a value very close to 0. It means your bullet's position stays almost the same position. Also you need a loop in Atack function to make bullet has the same position with bullet.

while (thisBullet.transform.position != playerPosition)
{    
    thisBullet.transform.position = Vector2.Lerp(thisBullet.transform.position, playerPosition, bulletSpeed * Time.deltaTime);
    yield return new WaitForSeconds(0.1f);
}

You can set while condition here however you want for your game. In this code it move to player's position every 0.1f.

Shoot a Bullet in player direction Unity

1 Answers