I have a script that fires bullets that I use with my first-person player, it uses gravity for bullet drop and I use a Linecast for the bullet positions plus a list to handle each new bullet.
However I just have an issue with calculating where the bullets should fire from and the direction. I have a “muzzle” empty object that I place at the end of my gun objects so that the bullets fire from the end of the actual gun. I also have a very simple crosshair centered on the screen, and the bullets fire at/towards it which is good.
But there’s a weird problem I just cannot solve, when I fire bullets near the edge of any collider, for example a simple cube object, the bullet direction will automatically change slightly to the right, and start firing in that new direction. So if I’m firing bullets at y-position 2.109f, if it’s next to the edge of a collider, it will then change direction and fire at y-position 2.164f which is very bad since it’s a large gap. I believe it’s to do with my Raycast and its hit calculation, but I can’t seem to fix it.
Any change I make either fixes that problem, but then bullets no longer fire towards the crosshair. So basically I fix one issue and break something else. I can post more code aswell.
void FireBullet()
{
Ray ray = Camera.main.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0f)); // default unity docs line
Vector3 aimDirection;
if (Physics.Raycast(ray, out RaycastHit hit))
{
aimDirection = (hit.point - muzzle.transform.position).normalized;
}
else
{
aimDirection = ray.direction;
}
Vector3 spawnPos = muzzle.transform.position;
activeBullets.Add(new Bullet(spawnPos, aimDirection, Time.time));
Debug.Log($"fire bullet at pos {spawnPos.y}");
}
If I take out that entire Raycast if statement and just use “aimDirection = ray.direction;”, the problem of bullets changing position goes away, but bullets no longer fire towards the crosshair.
