From 0783f14a9e7dc728bd2495ab4fd9714e6e7b6968 Mon Sep 17 00:00:00 2001
From: ChenXiaoSong <chenxiaosong@chenxiaosong.com>
Date: Mon, 6 Jan 2025 00:48:31 +0800
Subject: [PATCH] 2d/dodge_the_creeps: add dir buttons

Signed-off-by: ChenXiaoSong <chenxiaosong@chenxiaosong.com>
---
 2d/dodge_the_creeps/hud.gd    | 31 ++++++++++++++++++++++
 2d/dodge_the_creeps/hud.tscn  | 48 +++++++++++++++++++++++++++++++++++
 2d/dodge_the_creeps/main.tscn |  1 +
 2d/dodge_the_creeps/player.gd | 31 +++++++++++-----------
 4 files changed, 95 insertions(+), 16 deletions(-)

diff --git a/2d/dodge_the_creeps/hud.gd b/2d/dodge_the_creeps/hud.gd
index b4504f1b..c3be1d9d 100644
--- a/2d/dodge_the_creeps/hud.gd
+++ b/2d/dodge_the_creeps/hud.gd
@@ -1,6 +1,7 @@
 extends CanvasLayer
 
 signal start_game
+signal dir_button
 
 func show_message(text):
 	$MessageLabel.text = text
@@ -15,6 +16,10 @@ func show_game_over():
 	$MessageLabel.show()
 	await get_tree().create_timer(1).timeout
 	$StartButton.show()
+	$LeftButton.hide()
+	$RightButton.hide()
+	$UpButton.hide()
+	$DownButton.hide()
 
 
 func update_score(score):
@@ -24,7 +29,33 @@ func update_score(score):
 func _on_StartButton_pressed():
 	$StartButton.hide()
 	start_game.emit()
+	$LeftButton.show()
+	$RightButton.show()
+	$UpButton.show()
+	$DownButton.show()
+	var velocity = Vector2(0, 0)
+	dir_button.emit(velocity)
 
 
 func _on_MessageTimer_timeout():
 	$MessageLabel.hide()
+
+
+func _on_dir_left():
+	var velocity = Vector2(-1, 0)
+	dir_button.emit(velocity)
+
+
+func _on_dir_right():
+	var velocity = Vector2(1, 0)
+	dir_button.emit(velocity)
+
+
+func _on_dir_up():
+	var velocity = Vector2(0, -1)
+	dir_button.emit(velocity)
+
+
+func _on_dir_down():
+	var velocity = Vector2(0, 1)
+	dir_button.emit(velocity)
diff --git a/2d/dodge_the_creeps/hud.tscn b/2d/dodge_the_creeps/hud.tscn
index ab9e2b66..7c8ad3a2 100644
--- a/2d/dodge_the_creeps/hud.tscn
+++ b/2d/dodge_the_creeps/hud.tscn
@@ -57,5 +57,53 @@ text = "Start"
 [node name="MessageTimer" type="Timer" parent="."]
 one_shot = true
 
+[node name="LeftButton" type="Button" parent="."]
+visible = false
+modulate = Color(1, 1, 1, 0.298039)
+offset_left = 86.0
+offset_top = 400.0
+offset_right = 186.0
+offset_bottom = 500.0
+theme_override_font_sizes/font_size = 30
+text = "left"
+
+[node name="RightButton" type="Button" parent="."]
+visible = false
+modulate = Color(1, 1, 1, 0.298039)
+offset_left = 293.0
+offset_top = 400.0
+offset_right = 393.0
+offset_bottom = 500.0
+theme_override_font_sizes/font_size = 30
+text = "right"
+
+[node name="UpButton" type="Button" parent="."]
+visible = false
+modulate = Color(1, 1, 1, 0.298039)
+offset_left = 189.0
+offset_top = 296.0
+offset_right = 289.0
+offset_bottom = 396.0
+theme_override_font_sizes/font_size = 30
+text = "up"
+
+[node name="DownButton" type="Button" parent="."]
+visible = false
+modulate = Color(1, 1, 1, 0.298039)
+offset_left = 186.0
+offset_top = 505.0
+offset_right = 286.0
+offset_bottom = 605.0
+theme_override_font_sizes/font_size = 30
+text = "down"
+
 [connection signal="pressed" from="StartButton" to="." method="_on_StartButton_pressed"]
 [connection signal="timeout" from="MessageTimer" to="." method="_on_MessageTimer_timeout"]
+[connection signal="button_down" from="LeftButton" to="." method="_on_dir_left"]
+[connection signal="button_up" from="LeftButton" to="." method="_on_dir_right"]
+[connection signal="button_down" from="RightButton" to="." method="_on_dir_right"]
+[connection signal="button_up" from="RightButton" to="." method="_on_dir_left"]
+[connection signal="button_down" from="UpButton" to="." method="_on_dir_up"]
+[connection signal="button_up" from="UpButton" to="." method="_on_dir_down"]
+[connection signal="button_down" from="DownButton" to="." method="_on_dir_down"]
+[connection signal="button_up" from="DownButton" to="." method="_on_dir_up"]
diff --git a/2d/dodge_the_creeps/main.tscn b/2d/dodge_the_creeps/main.tscn
index ad0e9d88..38b9801b 100644
--- a/2d/dodge_the_creeps/main.tscn
+++ b/2d/dodge_the_creeps/main.tscn
@@ -56,4 +56,5 @@ stream = ExtResource("6_hp1r0")
 [connection signal="timeout" from="MobTimer" to="." method="_on_MobTimer_timeout"]
 [connection signal="timeout" from="ScoreTimer" to="." method="_on_ScoreTimer_timeout"]
 [connection signal="timeout" from="StartTimer" to="." method="_on_StartTimer_timeout"]
+[connection signal="dir_button" from="HUD" to="Player" method="_on_hud_dir_button"]
 [connection signal="start_game" from="HUD" to="." method="new_game"]
diff --git a/2d/dodge_the_creeps/player.gd b/2d/dodge_the_creeps/player.gd
index 74d8ddaa..0573c3f8 100644
--- a/2d/dodge_the_creeps/player.gd
+++ b/2d/dodge_the_creeps/player.gd
@@ -4,6 +4,7 @@ signal hit
 
 @export var speed = 400 # 玩家移动速度（像素/秒）。
 var screen_size # 游戏窗口的大小。
+var velocity = Vector2.ZERO # 玩家移动的向量。
 
 func _ready():
 	screen_size = get_viewport_rect().size
@@ -11,33 +12,24 @@ func _ready():
 
 
 func _process(delta):
-	var velocity = Vector2.ZERO # 玩家移动的向量。
-	if Input.is_action_pressed(&"move_right"):
-		velocity.x += 1
-	if Input.is_action_pressed(&"move_left"):
-		velocity.x -= 1
-	if Input.is_action_pressed(&"move_down"):
-		velocity.y += 1
-	if Input.is_action_pressed(&"move_up"):
-		velocity.y -= 1
-
+	var tmp_velocity = Vector2.ZERO
 	if velocity.length() > 0:
-		velocity = velocity.normalized() * speed
+		tmp_velocity = velocity.normalized() * speed
 		$AnimatedSprite2D.play()
 	else:
 		$AnimatedSprite2D.stop()
 
-	position += velocity * delta
+	position += tmp_velocity * delta
 	position = position.clamp(Vector2.ZERO, screen_size)
 
-	if velocity.x != 0:
+	if tmp_velocity.x != 0:
 		$AnimatedSprite2D.animation = &"right"
 		$AnimatedSprite2D.flip_v = false
 		$Trail.rotation = 0
-		$AnimatedSprite2D.flip_h = velocity.x < 0
-	elif velocity.y != 0:
+		$AnimatedSprite2D.flip_h = tmp_velocity.x < 0
+	elif tmp_velocity.y != 0:
 		$AnimatedSprite2D.animation = &"up"
-		rotation = PI if velocity.y > 0 else 0
+		rotation = PI if tmp_velocity.y > 0 else 0
 
 
 func start(pos):
@@ -52,3 +44,10 @@ func _on_body_entered(_body):
 	hit.emit()
 	# 必须延迟执行，因为我们不能在物理回调中更改物理属性。
 	$CollisionShape2D.set_deferred(&"disabled", true)
+
+
+func _on_hud_dir_button(dir):
+	if dir.length() > 0:
+		velocity += dir
+	else:
+		velocity = dir
-- 
2.43.0