Add a `Camera3D` as a child of a `Node3D` or `CharacterBody3D`
Attach a script to the parent node or the camera
Capture the mouse in `_ready()`:
`Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)`
Store rotation values:
`var yaw := 0.0`
`var pitch := 0.0`
In `_input(event)`, check for mouse motion:
`if event is InputEventMouseMotion:`
Update rotation from mouse movement:
`yaw -= event.relative.x * sensitivity`
`pitch -= event.relative.y * sensitivity`
Clamp vertical rotation:
`pitch = clamp(pitch, deg_to_rad(-89), deg_to_rad(89))`
Apply rotation:
`rotation.y = yaw`
`camera.rotation.x = pitch`
Use a small sensitivity value like `0.002`
Example script:
`extends Node3D`
`@onready var camera: Camera3D = $Camera3D`
`var yaw := 0.0`
`var pitch := 0.0`
`var sensitivity := 0.002`
`func _ready():`
` Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)`
`func _input(event):`
` if event is InputEventMouseMotion:`
` yaw -= event.relative.x * sensitivity`
` pitch -= event.relative.y * sensitivity`
` pitch = clamp(pitch, deg_to_rad(-89), deg_to_rad(89))`
` rotation.y = yaw`
` camera.rotation.x = pitch`
To release the mouse:
`Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)`