c# 2D top down, fire projectale which continuously move in a direction

Questions & Answers
1

Hi, I am trying to fire a projectile that should move in a direction until it gets destroyed depending on mouse position.

The following code works but the bullet stops at where I clicked, how can I make this bullet continue on its path until destroyed?

public class BulletStats : MonoBehaviour
{
    public int Damage = 1;              // Damage inflicted
    public bool isEnemyShot = false;    // Projectile from player or enemies?
    public Camera camera;               // camera object
    private float speed = 5f;           // bullet speed
    private Vector2 clickPos;           // bullet direction

    void Start()
    {
        camera = (Camera) GameObject.FindObjectOfType(typeof(Camera)); // get the camera
        
        // get world location of click
        clickPos = camera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y));

        Destroy(gameObject, 20); // give bullet 20 seconds lifetime
    }

    void Update()
    {
        // move the bullet in the right direction
        transform.position = Vector2.MoveTowards(transform.position, clickPos, speed * Time.deltaTime);
    }
}
2

Do you want the bullet move to the mouse position continuously? You should use the code:

clickPos = camera.ScreenToWorldPoint(new Vector3(Input.mousePosition.x, Input.mousePosition.y));

also in the Update method.

Still, it will stop at the mouse position. What kind of behaviour do you want? Should it pass the mouse position when it’s there?

3

What you need to do is convert the mouse position into a direction first.

Try the following:

// In the declarations
private Vector3 shotDirection;

// At line 15
shotDirection = (clickPos-transform.position).normalised;

// Replace line 22 with the following
transform.position = transform.position + shotDirection * speed * Time.deltaTime;
4

What you need to do:
Add a ridgidbody2D component to your bullet.
make it isKinematic and fixed angle.

get direction by normalized method. (Like BoredMormon suggested)

void Update()
{
    if(Input.GetMouseButtonUp(0))
    {
       // you get clickpos like what you have done and you do this
       Vector3 shotDir = ((Vector3)clickPos - transform.position).normalized;
    
       gameObject.rigidbody2D.velocity = shotDir;
    }
}