raycast add force to rigidbody

DJM

how do u correctly add force at a position of a rigidbody based on the raycasts hit point and the rays forward vector i made a small test but get very weird results

extends RayCast

export(PackedScene) var impact_normal
export var force = 20.0
export var damage = 50.0

func firebullet():
	self.force_raycast_update()
	
	if self.is_colliding():
		var collider = self.get_collider()
		
		var impact = impact_normal.instance()
		collider.add_child(impact)
		if collider is RigidBody:
			
			collider.add_force(self.global_transform.basis.z * force, self.get_collision_point())
			
		impact.global_transform.origin = self.get_collision_point()
		impact.look_at(self.get_collision_point()+ self.get_collision_normal(),Vector3.UP)

cybereality

Strange, that code looks like it should work. Can you explain what you mean by "weird results"?

Also, I usually do my ray casts like this, which is an alternate method and seems to work.

https://docs.godotengine.org/en/stable/tutorials/physics/ray-casting.html

cybereality

Oh, I'm sorry. Actually the raycast code works, but the function you want to call is apply_impulse(). Add_force is for adding constant forces (like flying a space ship) not for impacts like bullets.

DJM

@cybereality said: Oh, I'm sorry. Actually the raycast code works, but the function you want to call is apply_impulse(). Add_force is for adding constant forces (like flying a space ship) not for impacts like bullets.

add force isnt the problem the code doesnt work. wherever i shoot the rigidbody spins in the same direction

cybereality

The last parameter is in the global coordinate system, but centered on the objects origin. So if you want to apply a force/impulse you have to subtract the object position from the collision point first.

DJM

tnx that works