Add Multiplayer Demo

player.gd

@@ -0,0 +1,45 @@
+
+extends CharacterBody3D
+
+var gravity = ProjectSettings.get_setting("physics/3d/default_gravity")
+var speed = 5
+var jump_speed = 5
+var mouse_sensitivity = 0.002
+@onready var camera_3d: Camera3D = $"Camera3D"
+
+func _enter_tree():
+	set_multiplayer_authority(name.to_int())
+
+func _ready():
+	if !is_multiplayer_authority():
+		return;
+	camera_3d.make_current()
+	
+	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+
+func _input(event):
+	
+	if !is_multiplayer_authority():
+		return;
+	if event.is_action_pressed("ui_cancel"):
+		Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
+	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT and event.pressed:
+		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+		
+	if event is InputEventMouseMotion and Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
+		rotate_y(-event.relative.x * mouse_sensitivity)
+		camera_3d.rotate_x(-event.relative.y * mouse_sensitivity)
+		camera_3d.rotation.x = clampf(camera_3d.rotation.x, -deg_to_rad(70), deg_to_rad(70))
+		
+func _physics_process(delta):
+	
+	if !is_multiplayer_authority():
+		get_multiplayer_authority()
+		return;
+	velocity.y += -gravity * delta
+	var input = Input.get_vector("move_left", "move_right", "move_forward", "move_backward")
+	var movement_dir = transform.basis * Vector3(input.x, 0, input.y)
+	velocity.x = movement_dir.x * speed
+	velocity.z = movement_dir.z * speed
+	
+	move_and_slide()