Bullet Movement 2D

Questions & Answers
1

I’m struggling to make my bullet prefab move forward at a constant velocity when spawned. This is for a top down 2D shooter. Using AddForce doesn’t have the desired effect. Here is my code:

PlayerShooting

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerShooting : MonoBehaviour
{
    public Transform firePoint;
    public GameObject shellPrefab;

    public float shotDelay = 2f; //Delay bewteen shots

    private float timestamp;

    void Update()
    {
        if (Time.time >= timestamp && (Input.GetButtonDown("Fire1")))
        {
            Shoot();
            timestamp = Time.time + shotDelay; //Shot delay is used here
        }
    }

    void Shoot()
    {
        GameObject shell = Instantiate(shellPrefab, firePoint.position, firePoint.rotation);
        Debug.Log("Shooting");
    }
}

PlayerBullet

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerBullet : MonoBehaviour
{
    public float bulletSpeed;
    private Rigidbody2D rb;

    void Start()
    {
        rb = GetComponent<Rigidbody2D>();
    }

    void FixedUpdate()
    {
        rb.velocity = new Vector2(bulletSpeed, bulletSpeed);
    }
}

When spawned, the bullet doesn’t move at all. I’ve been struggling with this problem for weeks. I’m self taught, so please bear with me.

2

Maybe the problem is simply that you haven’t defined the value of bulletSpeed ?
It’s zero by default, so you’re giving the rigid body a null velocity.