Firing bullet in direction of mouse?

Unity Engine
1

My goal is to fire a bullet from a fire point set inside my weapon, but all it does it shoot up.

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

public class PlayerAim : MonoBehaviour
{
    public Transform weapon;
    public float radius;
    public GameObject player;
    public GameObject projectilePrefab;
    public GameObject firePoint;
    public float projectileSpeed = 40;
    public SpriteRenderer sRend;

    private Transform pivot;

    void Start()
    {
        pivot = weapon.transform;
        transform.parent = pivot;
        transform.position += Vector3.up * radius;
    }

    void Update()
    {
        Vector3 weaponVector = Camera.main.WorldToScreenPoint(weapon.position);
        weaponVector = Input.mousePosition - weaponVector;
        float angle = Mathf.Atan2(weaponVector.y, weaponVector.x) * Mathf.Rad2Deg;

        pivot.position = weapon.position;
        pivot.rotation = Quaternion.Euler(0f, 0f, angle);

        if (Input.GetMouseButtonDown(0))
        {
            Shoot();
        }

        if (Mathf.Abs(angle) > 90)
        {
            sRend.flipY = true;
        } else
        {
            sRend.flipY = false;
        }
    }

    void Shoot()
    {
        GameObject projGO = Instantiate<GameObject>(projectilePrefab, pivot.position, pivot.rotation);
        projGO.transform.position = firePoint.transform.position;
        Rigidbody2D rigidB = projGO.GetComponent<Rigidbody2D>();
        rigidB.velocity = Vector3.up * projectileSpeed;
    }
}
2

This is why it only goes up:

rigidB.velocity = Vector3.up * projectileSpeed;

You could try doing this if “pivot” faces your target:

rigidB.velocity = pivot.forward * projectileSpeed;
3

Thanks! For some reason, though, the bullet doesn’t shoot out? It seems to appear for a second on the firepoint, then spawn on the ground in the player’s start position.

4

Maybe try pivot.up * projectileSpeed instead of Vector3.up …I was just thinking you’re rotating the weapon in Z, so forward would be into the distance / wouldn’t work in 2D