Camera.gd

extends Camera3D

# Adapted from:
# https://github.com/nekotogd/Raytracing_Godot4

@export var mouse_sensitivity : float = 0.5
@export var move_speed : float = 5.0
@export var roll_speed: float = 40.0

func _input(event):
	if event is InputEventMouseMotion:
		if Input.is_action_pressed("left_mouse_btn"):
			rotate_y(deg_to_rad(event.relative.x * mouse_sensitivity))
			rotate_object_local(Vector3(1.0, 0.0, 0.0), deg_to_rad(event.relative.y * mouse_sensitivity))
	

func _process(_delta):
	if Input.is_action_pressed("left_mouse_btn"):
		Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
	else:
		Input.set_mouse_mode(Input.MOUSE_MODE_VISIBLE)
		
	if Input.is_action_pressed("roll_cw"):
		rotate_object_local(Vector3(0.0, 0.0, 1.0), deg_to_rad(-roll_speed * _delta))
	if Input.is_action_pressed("roll_ccw"):
		rotate_object_local(Vector3(0.0, 0.0, 1.0), deg_to_rad(roll_speed * _delta))
		
		
	_move(_delta)

func _move(_delta):
	var input_vector := Vector3.ZERO
	input_vector.x = Input.get_action_strength("move_left") - Input.get_action_strength("move_right")
	input_vector.z = Input.get_action_strength("move_backward") - Input.get_action_strength("move_forward")
	input_vector.y = Input.get_action_strength("move_up") - Input.get_action_strength("move_down")
	if input_vector.length() > 1.0:
		input_vector = input_vector.normalized()
	
	var displacement := Vector3.ZERO
	displacement = global_transform.basis.z * move_speed * input_vector.z * _delta
	global_transform.origin += displacement
	
	displacement = global_transform.basis.x * move_speed * input_vector.x * _delta
	global_transform.origin += displacement
	
	displacement = global_transform.basis.y * move_speed * input_vector.y * _delta
	global_transform.origin -= displacement