Help with rotation

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sensavenir

Hi,
i'm trying to write a movement script for a spaceship/mech and struggling to come up with something that works. Every existing solution I've come across seems to suffer from the same problem: when you rotate your view vertically (around the X axis), the local y-axis transform (sorry if I'm misusing the terminology, new to this) doesn't follow and any subsequent horizontal rotation, unless you reset your vertical rotation, occurs on 2 axes at once. essentially i need any mouse input to be relative only to the current view direction, since there's no gravity/ground/absolute direction. i thought it was gimbal lock when i was first using transforms so i tried to adapt a quaternion solution someone posted (code below) which didn't change anything. also tried to make a hybrid that does a local transform rotation but failed miserably, does any1 have any advice on how to accomplish this? i do not really understand quaternions. thank you kindly

func _input(event):
	if event is InputEventMouseMotion and Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
var mouse_delta = -event.relative * MOUSE_SENSITIVITY
		var threshold = .00001
		var delta_y_max = (-transform.basis.z).angle_to(Vector3.UP * sign(mouse_delta.y) )
		mouse_delta.y = clamp(abs(mouse_delta.y), 0.0, delta_y_max - threshold) * sign(mouse_delta.y)
		var horz_quat = Quat(transform.basis.xform_inv(Vector3.UP), mouse_delta.x)
		var vert_quat = Quat(Vector3.RIGHT, mouse_delta.y)
		transform.basis *= Basis(horz_quat * vert_quat)
		transform.basis = transform.basis.orthonormalized()

sensavenir

here's my frankenstein attempt, at the very least i'm lost as to why this doesn't properly rotate the y-axis given that it does work for the z-axis

func _input(event):
	if event is InputEventMouseMotion and Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
		rot_x -= (event.relative.x * MOUSE_SENSITIVITY)
		rot_y -= (event.relative.y * MOUSE_SENSITIVITY)
		clamp(rot_x, -87, 87)
		clamp(rot_y, -87, 87)
		transform.basis = Basis()
		rotate_object_local(Vector3(1, 0, 0), rot_y)
		var horz_quat = Quat(transform.basis.xform_inv(Vector3.UP), rot_x)
		transform.basis *= Basis(horz_quat)
		transform.basis = transform.basis.orthonormalized()