基本完结

.idea/.idea.2ddemo/.idea/.name

@@ -1 +0,0 @@
-2ddemo

Hud.cs

@@ -0,0 +1,71 @@
+using Godot;
+using System;
+
+public partial class Hud : CanvasLayer
+{
+	
+	// StartGame 信号
+	[Signal]
+	public delegate void StartGameEventHandler();
+	
+	public void ShowMessage(string text)
+	{
+		var message = GetNode<Label>("Message");
+		message.Text = text;
+		message.Show();
+
+		GetNode<Timer>("MessageTimer").Start();
+	}
+	
+	// 处理异步
+	async public void ShowGameOver()
+	{
+		
+		ShowMessage("Game Over");
+
+		var messageTimer = GetNode<Timer>("MessageTimer");
+		// await 关键字暂停了 ShowGameOver 方法的执行，
+		// 直到 messageTimer 发出超时信号（Timeout）。ToSignal 是 Godot 提供的用于异步等待信号的方法。
+		await ToSignal(messageTimer, Timer.SignalName.Timeout);
+
+		// 显示游戏标题
+		var message = GetNode<Label>("Message");
+		message.Text = "Dodge the Creeps!";
+		message.Show();
+
+		//可以使用场景树的 get_tree().create_timer(2) 函数替代使用 Timer 节点。
+		//这对于延迟非常有用，例如在上述代码中，在这里我们需要在显示“开始”按钮前等待片刻。
+		await ToSignal(GetTree().CreateTimer(1.0), SceneTreeTimer.SignalName.Timeout);
+		GetNode<Button>("StartButton").Show();
+	}
+	
+	public void UpdateScore(int score)
+	{
+		GetNode<Label>("ScoreLabel").Text = score.ToString();
+	}
+	
+	
+	// We also specified this function name in PascalCase in the editor's connection window.
+	private void OnStartButtonPressed()
+	{
+		GetNode<Button>("StartButton").Hide();
+		EmitSignal(SignalName.StartGame);
+	}
+
+// We also specified this function name in PascalCase in the editor's connection window.
+	private void OnMessageTimerTimeout()
+	{
+		GetNode<Label>("Message").Hide();
+	}
+	
+	
+	// Called when the node enters the scene tree for the first time.
+	public override void _Ready()
+	{
+	}
+
+	// Called every frame. 'delta' is the elapsed time since the previous frame.
+	public override void _Process(double delta)
+	{
+	}
+}

Main.cs

@@ -12,7 +12,7 @@ public partial class Main : Node
 	public override void _Ready()
 	{
 		
-		NewGame();
+
 	}
 
 	// Called every frame. 'delta' is the elapsed time since the previous frame.
@@ -26,11 +26,20 @@ public partial class Main : Node
 	{
 		GetNode<Timer>("MobTimer").Stop();
 		GetNode<Timer>("ScoreTimer").Stop();
+		GetNode<Hud>("HUD").ShowGameOver();
+
 	}
 
 	public void NewGame()
 	{
 		_score = 0;
+		var hud = GetNode<Hud>("HUD");
+		hud.UpdateScore(_score);
+		hud.ShowMessage("Get Ready!");
+		
+		// 清楚上一轮游戏的小怪，清除队列call_group() 函数调用组中每个节点上的删除函数——让每个怪物删除其自身。
+		
+		GetTree().CallGroup("mobs", Node.MethodName.QueueFree);
 
 		var player = GetNode<Player>("Player");
 		var startPosition = GetNode<Marker2D>("StartPosition");
@@ -45,6 +54,8 @@ public partial class Main : Node
 	private void OnScoreTimerTimeout()
 	{
 		_score++;
+		GetNode<Hud>("HUD").UpdateScore(_score);
+
 	}
 
 // We also specified this function name in PascalCase in the editor's connection window.
@@ -70,21 +81,32 @@ public partial class Main : Node
 
 		// Choose a random location on Path2D.
 		// 选择一个随机path
+		// 获取路径节点中的一个子节点 PathFollow2D，用于在路径上指定一个位置。PathFollow2D 是沿着预定义路径移动的节点。
+		// ProgressRatio 用于设置 PathFollow2D 在路径上的位置。
+		// GD.Randf() 返回一个 0.0 到 1.0 的随机浮点数，使生成位置在路径的任何随机点上。 
+	
 		var mobSpawnLocation = GetNode<PathFollow2D>("MobPath/MobSpawnLocation");
 		mobSpawnLocation.ProgressRatio = GD.Randf();
 
 		// Set the mob's direction perpendicular to the path direction.
+		// direction 变量表示 Mob 的初始方向，基于 mobSpawnLocation 的当前旋转
+		// 并加上 π/2。这是因为 Mob 的方向需要垂直于路径的方向。
 		float direction = mobSpawnLocation.Rotation + Mathf.Pi / 2;
 
 		// Set the mob's position to a random location.
+		// 将 Mob 的位置设置为 mobSpawnLocation 的当前位置。这意味着 Mob 将在 Path2D 路径上的随机位置生成。
 		mob.Position = mobSpawnLocation.Position;
 
 		// Add some randomness to the direction.
+		// 给 Mob 的方向添加了一些随机性，范围在 -π/4 到 π/4 之间，
+		// 这样 Mob 不会总是沿着同样的方向移动。通过增加随机旋转，使生成的 Mob 朝着一个稍微偏离的方向移动，增加了不可预测性。
+		// 将 Mob 的旋转设置为这个新的方向。
 		direction += (float)GD.RandRange(-Mathf.Pi / 4, Mathf.Pi / 4);
 		mob.Rotation = direction;
 
 		// Choose the velocity.
 		// 怪物速度在150-250随机
+		// 使用 Rotated(direction) 方法将速度向量旋转到 Mob 的朝向，使 Mob 朝着设定的方向移动。
 		var velocity = new Vector2((float)GD.RandRange(150.0, 250.0), 0);
 		mob.LinearVelocity = velocity.Rotated(direction);
 

hud.tscn

@@ -0,0 +1,63 @@
+[gd_scene load_steps=3 format=3 uid="uid://c8eip7vknt4no"]
+
+[ext_resource type="Script" path="res://Hud.cs" id="1_b1a6w"]
+[ext_resource type="FontFile" uid="uid://77ktpe0gag84" path="res://fonts/Xolonium-Regular.ttf" id="2_p0olu"]
+
+[node name="HUD" type="CanvasLayer"]
+script = ExtResource("1_b1a6w")
+
+[node name="ScoreLabel" type="Label" parent="."]
+anchors_preset = 5
+anchor_left = 0.5
+anchor_right = 0.5
+offset_left = -22.5
+offset_right = 22.5
+offset_bottom = 78.0
+grow_horizontal = 2
+theme_override_fonts/font = ExtResource("2_p0olu")
+theme_override_font_sizes/font_size = 64
+text = "1"
+
+[node name="Message" type="Label" parent="."]
+custom_minimum_size = Vector2(480, 0)
+anchors_preset = 8
+anchor_left = 0.5
+anchor_top = 0.5
+anchor_right = 0.5
+anchor_bottom = 0.5
+offset_left = -88.5
+offset_top = -39.0
+offset_right = 88.5
+offset_bottom = 39.0
+grow_horizontal = 2
+grow_vertical = 2
+theme_override_fonts/font = ExtResource("2_p0olu")
+theme_override_font_sizes/font_size = 64
+text = "Dodge The Creeps!"
+horizontal_alignment = 1
+vertical_alignment = 1
+autowrap_mode = 2
+
+[node name="StartButton" type="Button" parent="."]
+custom_minimum_size = Vector2(200, 100)
+anchors_preset = 7
+anchor_left = 0.5
+anchor_top = 1.0
+anchor_right = 0.5
+anchor_bottom = 1.0
+offset_left = -100.0
+offset_top = -198.0
+offset_right = 100.0
+offset_bottom = -98.0
+grow_horizontal = 2
+grow_vertical = 0
+theme_override_fonts/font = ExtResource("2_p0olu")
+theme_override_font_sizes/font_size = 64
+text = "Start"
+
+[node name="MessageTimer" type="Timer" parent="."]
+wait_time = 2.0
+one_shot = true
+
+[connection signal="pressed" from="StartButton" to="." method="OnStartButtonPressed"]
+[connection signal="timeout" from="MessageTimer" to="." method="OnMessageTimerTimeout"]

main.tscn

@@ -1,8 +1,9 @@
-[gd_scene load_steps=5 format=3 uid="uid://do83xd3leoud0"]
+[gd_scene load_steps=6 format=3 uid="uid://do83xd3leoud0"]
 
 [ext_resource type="PackedScene" uid="uid://d00fo6b251wcw" path="res://player.tscn" id="1_8xvyb"]
 [ext_resource type="Script" path="res://Main.cs" id="1_o5srj"]
 [ext_resource type="PackedScene" uid="uid://caloretbkmfga" path="res://mob.tscn" id="2_852fk"]
+[ext_resource type="PackedScene" uid="uid://c8eip7vknt4no" path="res://hud.tscn" id="4_ippxg"]
 
 [sub_resource type="Curve2D" id="Curve2D_ibmf5"]
 _data = {
@@ -35,7 +36,10 @@ curve = SubResource("Curve2D_ibmf5")
 position = Vector2(-1, -1)
 rotation = 0.000868055
 
+[node name="HUD" parent="." instance=ExtResource("4_ippxg")]
+
 [connection signal="Hit" from="Player" to="." method="GameOver"]
 [connection signal="timeout" from="MobTimer" to="." method="OnMobTimerTimeout"]
 [connection signal="timeout" from="ScoreTimer" to="." method="OnScoreTimerTimeout"]
 [connection signal="timeout" from="StartTimer" to="." method="OnStartTimerTimeout"]
+[connection signal="StartGame" from="HUD" to="." method="NewGame"]

mob.tscn

@@ -48,7 +48,7 @@ animations = [{
 radius = 36.0
 height = 94.0
 
-[node name="Mob" type="RigidBody2D"]
+[node name="Mob" type="RigidBody2D" groups=["mobs"]]
 collision_mask = 0
 gravity_scale = 0.0
 script = ExtResource("1_i4imo")