How to disable mouse impacting FPS controller when a GUI is open?

[BrickyT]

Godot Version

4.3

Question

I have a basic ImGui displayed on toggle and I want to disable my FPS controller mouse input when the Gui is open. I have a FPS controller (mouse is “attached” to the center of the screen like typical FPS) and when I toggle the Gui I set MOUSE_MODE_VISIBLE but the mouse still controls the camera movement as well as the cursor.

Does anyone know if there is a simple way to disable the mouse inputs (including mouse buttons) when the Gui is toggled on? All I can come up with is some jank by referencing the camera and set_process_input but I haven’t gotten it to work either.

Here is my gui script for reference. Thanks for any help you can provide. Cheers!

extends Node

var ai_driver_on := true
var gui_visible := false

func _ready() -> void:
	Engine.max_fps = 120
	var io := ImGui.GetIO()
	io.ConfigFlags |= ImGui.ConfigFlags_ViewportsEnable
	# Capture the mouse cursor initially
	Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

func _input(event: InputEvent) -> void:
	if event.is_action_pressed("toggle_gui"):
		gui_visible = not gui_visible
		if gui_visible:
			Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
		else:
			Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)

func _process(_delta: float) -> void:
	if not gui_visible:
		return
	
	if ImGui.Begin("AI Driver Control"):
		if ImGui.Checkbox("Turn AI Driver Off", [not ai_driver_on]):
			ai_driver_on = not ai_driver_on
		
		ImGui.Text("AI Driver is currently: %s" % ("On" if ai_driver_on else "Off"))
	ImGui.End()

# Add this function to handle game input when GUI is not visible
func _unhandled_input(event: InputEvent) -> void:
	if not gui_visible:
		# Handle your game input here
		pass
	else:
		# Consume input events when GUI is visible to prevent them from affecting the game
		get_viewport().set_input_as_handled()

[LoonByte]

This is not the script for the FPS controller, is it? Where do you handle aiming during normal play?

[dusk]

Add an if statement before ur mouse movement code.

if event is InputEventMouseMotion:
	if Input.mouse_mode != Input.MOUSE_MODE_CAPTURED: return
		
	rotate_y(-event.relative.x * 0.001 * SENS)
	head.rotate_x(-event.relative.y * 0.001 * SENS)
	head.rotation.x = clampf(head.rotation.x, -PI/2.0, PI/2.0)

note: i used the inverse of the bool i wanted followed by “return” to reduce code nesting

[BrickyT]

Thank you @dusk !!!