Godot Orbital Camera Controller

CameraController.gd

extends Camera

export var follow_target_path:NodePath = ""
var follow_target:Node
export var follow_distance:float = 5.0
export var follow_height:float = 1.0

export var mouse_sensitivity_x:float = 0.005
export var mouse_sensitivity_y:float = 0.005
var last_mouse_delta:Vector2 = Vector2()
var mouse_accumulator:Vector2 = Vector2()  # The reason we have this instead of using the mouse.position is 'cause when we capture the camera, this will always be 0.

func _ready():
	follow_target = get_node(follow_target_path)

func _process(delta):
	# Looking.  Rotate _this_.  Tilt _camera_.
	mouse_accumulator += last_mouse_delta  # TODO: Cap the Y component.
	last_mouse_delta = Vector2()  # Reset after we process the mouse so we don't accumulate between events.
	
	# Calculate our new position.
	var look_target = follow_target.global_transform.origin + Vector3(0, follow_height, 0)
	var target_position = look_target + \
		Vector3(cos(mouse_accumulator.x*mouse_sensitivity_x), sin(mouse_accumulator.y*mouse_sensitivity_y), sin(mouse_accumulator.x*mouse_sensitivity_x))*follow_distance
		
	self.look_at_from_position(target_position, look_target, Vector3(0, 1, 0))

# For mouse handling:
func _input(event):
	if event is InputEventMouseMotion:
		#event.position Will always be center when in capture mode.  Same with event.speed.
		last_mouse_delta = event.relative