init

demo/scripts/arcade/player_arcade.gd

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+class_name PlayerArcade
+extends CharacterBody3D
+
+# Arcade player: same FPS controller as the demo, plus HP and a melee
+# attack on left-click. Emits hp_changed and died signals; arcade_scene
+# listens and updates the HUD / restart logic.
+
+signal hp_changed(current: int, maximum: int)
+signal died
+signal attacked(hit_point: Vector3, hit_body: Node)
+
+@export var speed := 6.0
+@export var run_multiplier := 1.8
+@export var jump_velocity := 6.0
+@export var gravity := 22.0
+@export var mouse_sensitivity := 0.002
+@export var max_hp := 20
+@export var melee_range := 1.6
+@export var melee_damage := 6
+@export var melee_cooldown := 0.35
+
+@onready var camera: Camera3D = $Camera3D
+
+var hp := 20
+var _pitch := 0.0
+var _captured := false
+var _melee_timer := 0.0
+var _alive := true
+
+func _ready() -> void:
+	hp = max_hp
+	hp_changed.emit(hp, max_hp)
+	_capture()
+
+func _capture() -> void:
+	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED
+	_captured = true
+
+func _release() -> void:
+	Input.mouse_mode = Input.MOUSE_MODE_VISIBLE
+	_captured = false
+
+func _unhandled_input(event: InputEvent) -> void:
+	if not _alive:
+		return
+	if event is InputEventMouseMotion and _captured:
+		var m := event as InputEventMouseMotion
+		rotation.y -= m.relative.x * mouse_sensitivity
+		_pitch -= m.relative.y * mouse_sensitivity
+		_pitch = clamp(_pitch, deg_to_rad(-85.0), deg_to_rad(85.0))
+		camera.rotation.x = _pitch
+	elif event is InputEventKey and event.pressed and event.keycode == KEY_ESCAPE:
+		_release()
+	elif event is InputEventMouseButton and event.pressed:
+		if not _captured:
+			_capture()
+		elif event.button_index == MOUSE_BUTTON_LEFT:
+			_try_attack()
+
+func _physics_process(delta: float) -> void:
+	if not _alive:
+		return
+	if _melee_timer > 0.0:
+		_melee_timer -= delta
+
+	if not is_on_floor():
+		velocity.y -= gravity * delta
+
+	var input := Vector2.ZERO
+	if Input.is_key_pressed(KEY_W): input.y -= 1.0
+	if Input.is_key_pressed(KEY_S): input.y += 1.0
+	if Input.is_key_pressed(KEY_A): input.x -= 1.0
+	if Input.is_key_pressed(KEY_D): input.x += 1.0
+	input = input.normalized()
+
+	var s := speed
+	if Input.is_key_pressed(KEY_SHIFT):
+		s *= run_multiplier
+
+	var forward := -transform.basis.z
+	var right := transform.basis.x
+	var horiz := (forward * -input.y + right * input.x) * s
+	velocity.x = horiz.x
+	velocity.z = horiz.z
+
+	if is_on_floor() and Input.is_key_pressed(KEY_SPACE):
+		velocity.y = jump_velocity
+
+	move_and_slide()
+
+# Deal damage to any enemy within melee_range in front of the camera.
+func _try_attack() -> void:
+	if _melee_timer > 0.0:
+		return
+	_melee_timer = melee_cooldown
+
+	var origin := camera.global_position
+	var dir := -camera.global_transform.basis.z
+	var space := get_world_3d().direct_space_state
+	var query := PhysicsRayQueryParameters3D.create(origin, origin + dir * melee_range)
+	query.exclude = [self]
+	var hit := space.intersect_ray(query)
+	if hit.is_empty():
+		return
+	var body := hit.get("collider") as Node
+	if body and body.has_method("take_damage"):
+		body.take_damage(melee_damage, self)
+	attacked.emit(hit.get("position", Vector3.ZERO), body)
+
+# Called by enemies.
+func take_damage(amount: int, _source: Node) -> void:
+	if not _alive:
+		return
+	hp = max(0, hp - amount)
+	hp_changed.emit(hp, max_hp)
+	if hp <= 0:
+		_alive = false
+		died.emit()