first examples

entities/viewer/viewer.gd

@@ -0,0 +1,52 @@
+extends CharacterBody3D
+
+@export var rotation_speed: float = 0.002
+
+
+const SPEED = 5.0
+const JUMP_VELOCITY = 4.5
+
+func _ready() -> void:
+	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+
+
+func _input(event: InputEvent) -> void:
+	if Input.is_action_pressed("ui_cancel"):
+		Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
+
+	if event is InputEventMouseButton and event.button_index == 1 and event.is_pressed():
+		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+
+	if event is InputEventMouseMotion:
+		handle_motion(event)
+
+
+func _physics_process(delta: float) -> void:
+	# Add the gravity.
+	if not is_on_floor():
+		velocity += get_gravity() * delta
+
+	# Handle jump.
+	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
+		velocity.y = JUMP_VELOCITY
+
+	# Get the input direction and handle the movement/deceleration.
+	# As good practice, you should replace UI actions with custom gameplay actions.
+	var input_dir := Input.get_vector("left", "right", "front", "back")
+	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
+	if direction:
+		velocity.x = direction.x * SPEED
+		velocity.z = direction.z * SPEED
+	else:
+		velocity.x = move_toward(velocity.x, 0, SPEED)
+		velocity.z = move_toward(velocity.z, 0, SPEED)
+
+	move_and_slide()
+
+func handle_motion(event: InputEventMouseMotion) -> void:
+	if not Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
+		return
+
+	$Camera3D.rotation.x -= event.relative.y * rotation_speed
+	$Camera3D.rotation.x = clamp($Camera3D.rotation.x, deg_to_rad(-89), deg_to_rad(89))
+	rotation.y -= event.relative.x * rotation_speed