创建新工程

scripts/VirtualButton.gd

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+extends Control
+class_name VirtualButton
+## 虚拟按钮控件
+## 用于移动端触摸输入
+
+# 按钮参数
+@export var button_radius: float = 40.0
+@export var button_text: String = "E"
+
+# 按钮状态
+var is_pressed_state: bool = false
+var was_just_pressed: bool = false
+var touch_index: int = -1
+
+# 视觉元素
+var button_circle: ColorRect
+var label: Label
+
+func _ready():
+	"""初始化虚拟按钮"""
+	_create_visual_elements()
+	
+	# 设置大小
+	custom_minimum_size = Vector2(button_radius * 2, button_radius * 2)
+	size = custom_minimum_size
+
+func _create_visual_elements():
+	"""创建按钮的视觉元素"""
+	# 创建按钮背景
+	button_circle = ColorRect.new()
+	button_circle.color = Color(0.2, 0.6, 0.2, 0.6)
+	button_circle.size = Vector2(button_radius * 2, button_radius * 2)
+	button_circle.position = Vector2.ZERO
+	add_child(button_circle)
+	
+	# 创建文本标签
+	label = Label.new()
+	label.text = button_text
+	label.horizontal_alignment = HORIZONTAL_ALIGNMENT_CENTER
+	label.vertical_alignment = VERTICAL_ALIGNMENT_CENTER
+	label.size = Vector2(button_radius * 2, button_radius * 2)
+	label.position = Vector2.ZERO
+	label.add_theme_font_size_override("font_size", 24)
+	add_child(label)
+
+func _process(_delta: float):
+	"""每帧更新"""
+	# 重置 just_pressed 状态
+	if was_just_pressed:
+		was_just_pressed = false
+
+func _gui_input(event: InputEvent):
+	"""处理触摸输入"""
+	if event is InputEventScreenTouch:
+		if event.pressed:
+			# 触摸开始
+			is_pressed_state = true
+			was_just_pressed = true
+			touch_index = event.index
+			_update_visual(true)
+		elif event.index == touch_index:
+			# 触摸结束
+			is_pressed_state = false
+			touch_index = -1
+			_update_visual(false)
+
+func _update_visual(pressed: bool):
+	"""更新按钮视觉状态"""
+	if pressed:
+		button_circle.color = Color(0.3, 0.8, 0.3, 0.8)
+	else:
+		button_circle.color = Color(0.2, 0.6, 0.2, 0.6)
+
+## 检查按钮是否刚被按下
+func is_pressed() -> bool:
+	"""
+	检查按钮是否刚被按下（类似 Input.is_action_just_pressed）
+	@return: 是否刚被按下
+	"""
+	return was_just_pressed
+
+## 检查按钮是否正在被按住
+func is_held() -> bool:
+	"""
+	检查按钮是否正在被按住
+	@return: 是否被按住
+	"""
+	return is_pressed_state