Compose vessels from definitions and capabilities

VesselShieldComponent.gd

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+class_name VesselShieldComponent
+extends Node
+
+const SHIELD_COLOR: Color = Color(0.45, 0.8, 1.0)
+const SHIELD_RADIUS: float = 30.0
+
+var capability_id: String = "shield"
+var charges: int = 0
+var recharge_left: float = 0.0
+var ring: Node2D
+
+
+func setup() -> void:
+	var ship: Node2D = get_parent()
+	var state: Node = ship.get_tree().root.get_node("GameState")
+	ring = NeonPiece.create(ship, Vector2.ZERO, SHIELD_COLOR)
+	var points := PackedVector2Array()
+	for i in range(14):
+		var angle: float = float(i) / 14.0 * TAU
+		points.append(Vector2(cos(angle), sin(angle)) * SHIELD_RADIUS)
+	ring.add_polygon(points, 0.7)
+	ring.queue_redraw()
+	charges = int(state.vessel_stat(ship.vessel_type, "shield_charges"))
+	_update_visual()
+
+
+func apply_stats() -> void:
+	var was_up: bool = charges > 0
+	if was_up:
+		charges = int(_state().vessel_stat(get_parent().vessel_type, "shield_charges"))
+	_update_visual()
+
+
+func tick(delta: float) -> void:
+	var maximum: int = int(_state().vessel_stat(get_parent().vessel_type, "shield_charges"))
+	if charges >= maximum:
+		return
+	recharge_left -= delta
+	if recharge_left <= 0.0:
+		charges += 1
+		recharge_left = _state().vessel_stat(get_parent().vessel_type, "shield_recharge")
+		_update_visual()
+
+
+func is_active() -> bool:
+	return charges > 0
+
+
+func absorb_hit() -> bool:
+	if not is_active():
+		return false
+	charges -= 1
+	recharge_left = _state().vessel_stat(get_parent().vessel_type, "shield_recharge")
+	_update_visual()
+	return true
+
+
+func set_charges(value: int) -> void:
+	charges = value
+	_update_visual()
+
+
+func _state() -> Node:
+	return get_tree().root.get_node("GameState")
+
+
+func _update_visual() -> void:
+	if ring != null:
+		ring.visible = is_active()