feat: 添加玩家和敌人血条

scenes/components/health_component.gd

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+extends Node
+class_name HealthComponent
+
+signal on_unit_hit
+signal on_unit_died
+signal on_health_changed(current: float, max: float)
+
+var max_health := 1.0
+var current_health := 1.0
+
+func setup(stats: UnitStats) -> void:
+	max_health = stats.health
+	current_health = max_health
+	on_health_changed.emit(current_health, max_health)
+	
+func take_damage(value: float) -> void:
+	if current_health <=0:
+		return
+		
+	current_health -= value
+	current_health = max(0, current_health)
+	
+	on_unit_hit.emit()
+	on_health_changed.emit(current_health, max_health)
+	
+	if current_health <= 0:
+		current_health = 0
+		on_unit_died.emit()
+		die()
+	
+func heal(amount: float) -> void:
+	if current_health <= 0:
+		return
+	
+	current_health += amount
+	current_health = min(max_health, current_health)
+	on_health_changed.emit(current_health, max_health)
+	
+		
+func die() -> void:
+	owner.queue_free()
+	

scenes/components/health_component.gd.uid

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+uid://c2hqb7ixwow4h

scenes/components/health_component.tscn

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+[gd_scene format=3 uid="uid://2ew7i6g3p0v8"]
+
+[ext_resource type="Script" uid="uid://c2hqb7ixwow4h" path="res://scenes/components/health_component.gd" id="1_2wcl1"]
+
+[node name="HealthComponent" type="Node" unique_id=455886217]
+script = ExtResource("1_2wcl1")