3RD PERSON SHOOTER HELP

Miro

I'm trying to make a socom 2 like game. I have everything setup but i can't figure out how to point the gun's raycast to my camera center crosshairs. Anyone have a simple solution to this? I tried youtube but most vids are for FirstPersonShooters.

Megalomaniak

You have the camera as the parent of the raycast?

cybereality

Shoot a ray cast from the camera center into the world and get the collision point. Then use another ray cast from the barrel of the gun to the found collision point (you might want to orient the gun/arm using look_at so it looks more realistic, but it depends on your art setup).

Alternatively, you can fake it, and just use the camera center ray cast to handle the shoot/collide logic (you can have a tracer/muzzle flash come off the gun, users probably wouldn't notice). This is definitely less realistic, but it would make some of the math easier.

cybereality

The math really isn't any different for first-person or third-person.

Miro

@Megalomaniak I did have the camera as a parent and everything works hits perfectly where i click and then i added a spatial as a muzzle to intersect the raycast coming from the camera but it skips hits and its not consistent. The bullets have to go out of the gun because if you're above someone and hide your crosshair can still hit the other player.

Miro

@cybereality i did what you said this is the code "aim" is cam raycast and "muzzle" is the guns raycast

if Input.is_action_just_pressed("FIRE"):
	if aim.is_colliding():
		var bullet = get_world().direct_space_state
		var collision = bullet.intersect_ray(muzzle.global_transform.origin, aim.get_collision_point())
		if collision:
			var target = collision.collider
			if target.is_in_group("Enemy"):
				target.health -= damage

it works sometimes i don't know if its godot or i just misplaced something. lol

Megalomaniak

@cybereality said: Alternatively, you can fake it, and just use the camera center ray cast to handle the shoot/collide logic (you can have a tracer/muzzle flash come off the gun, users probably wouldn't notice). This is definitely less realistic, but it would make some of the math easier.

This is indeed how it's quite often done and the meta-gamers definitely do notice and use it to their advantage, shoot around corners in TPP shooters for an example. Also this is typically called hit-scan weapons while weapons that actually shoot a physics based projectile are called(surprise!) projectile weapons.

cybereality

The code looks right. I think the problem is with the ray length. You'd have to have "aim" with a really long length (depending on the size of your level or range of guns). Also, the intersect_ray to point could be a normalized direction times the longest ray length you want to support. I haven't tested this, but maybe it could work:

    if Input.is_action_just_pressed("FIRE"):
        if aim.is_colliding():
            var bullet = get_world().direct_space_state
            var ray_length = 1000.0
            var aim_normal = (aim.get_collision_point() - muzzle.global_transform.origin).normalized()
            var collision = bullet.intersect_ray(muzzle.global_transform.origin, aim_normal * ray_length)
            if collision:
                var target = collision.collider
                if target.is_in_group("Enemy"):
                    target.health -= damage

Miro

@cybereality It is ALOT better I've set the aim ray like -5000 lol thank you for your help I really appreciate it