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Question by iKebab897 · Aug 08, 2021 at 09:28 AM · 2dtopdownshooterweapons

Writing weapon imprecision

Im creating a top-down 2D shooter game. I want my weapons to not shoot perfectly where I aim, but rather have a public float precisionthat goes from 0 to 100. Bullets then have a random side deviation from a minimum angle to a maximum angle based on the precision amount. And the bullet should also rotate accordingly based on shoot angle.

I've been trying to do this for days to almost no avail. I'm very new to Unity and don't really understand how Quaternions and stuff work.

This is my code right now:

 float lastFire;
 public virtual void Fire()
 {
     if (Time.time > (lastFire + fireRate))
     {
           var bullet = Instantiate(bulletPrefab, firePoint.position, firePoint.rotation);
           var rb = bullet.GetComponent<Rigidbody2D>();
 
           // Shoot bullet
           rb.AddForce(firePoint.right * projectileSpeed, ForceMode2D.Impulse);
 
          lastFire = Time.time;
      }

Any ideas?

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Answer by Llama_w_2Ls · Aug 08, 2021 at 09:32 AM

You can use Random.insideUnitCircle to get a random Vector2 direction. This will act as your offset. Multiply that by the precision amount and you should get a random deviation of a certain amount depending on the level of precision you set. For example:

 // The lower the precision, the less offset there is
 Vector2 offset = Random.insideUnitCircle * Precision;
 
 // Adding the vectors together results in bullet deviation
 rb.AddForce(firePoint.right + offset, ...);



Hope that's what you asked for. @iKebab897


engi gaming..

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avatar image iKebab897 · Aug 08, 2021 at 10:18 AM 0
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Thanks for the early answer. Following your suggestion, I tried the following code:

         Vector3 offset = Random.insideUnitCircle * precision;
         rb.AddForce((firePoint.right + offset) * projectileSpeed, ForceMode2D.Impulse);

Unfortunately this causes my character to teleport around for some reason when I shoot no matter the precision amount. @Llama_w_2Ls

engineer ga$$anonymous$$g

avatar image rage_co iKebab897 · Aug 08, 2021 at 10:38 AM 0
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you need to add this code to the bullet.....i think

avatar image iKebab897 rage_co · Aug 08, 2021 at 11:44 AM 0
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Nope, this needs to be on the weapon.

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