创建新工程

scripts/VirtualJoystick.gd

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+extends Control
+class_name VirtualJoystick
+## 虚拟摇杆控件
+## 用于移动端触摸输入
+
+# 摇杆参数
+@export var joystick_radius: float = 50.0
+@export var stick_radius: float = 20.0
+@export var dead_zone: float = 0.2
+
+# 摇杆状态
+var is_pressed: bool = false
+var touch_index: int = -1
+var stick_position: Vector2 = Vector2.ZERO
+var output_direction: Vector2 = Vector2.ZERO
+
+# 视觉元素
+var base_circle: ColorRect
+var stick_circle: ColorRect
+
+func _ready():
+	"""初始化虚拟摇杆"""
+	_create_visual_elements()
+	
+	# 设置大小
+	custom_minimum_size = Vector2(joystick_radius * 2, joystick_radius * 2)
+	size = custom_minimum_size
+
+func _create_visual_elements():
+	"""创建摇杆的视觉元素"""
+	# 创建底座
+	base_circle = ColorRect.new()
+	base_circle.color = Color(0.3, 0.3, 0.3, 0.5)
+	base_circle.size = Vector2(joystick_radius * 2, joystick_radius * 2)
+	base_circle.position = Vector2.ZERO
+	add_child(base_circle)
+	
+	# 创建摇杆
+	stick_circle = ColorRect.new()
+	stick_circle.color = Color(0.8, 0.8, 0.8, 0.8)
+	stick_circle.size = Vector2(stick_radius * 2, stick_radius * 2)
+	stick_circle.position = Vector2(joystick_radius - stick_radius, joystick_radius - stick_radius)
+	add_child(stick_circle)
+
+func _gui_input(event: InputEvent):
+	"""处理触摸输入"""
+	if event is InputEventScreenTouch:
+		if event.pressed:
+			# 触摸开始
+			is_pressed = true
+			touch_index = event.index
+			_update_stick_position(event.position)
+		elif event.index == touch_index:
+			# 触摸结束
+			is_pressed = false
+			touch_index = -1
+			_reset_stick()
+	
+	elif event is InputEventScreenDrag and event.index == touch_index:
+		# 触摸拖动
+		_update_stick_position(event.position)
+
+func _update_stick_position(touch_pos: Vector2):
+	"""更新摇杆位置"""
+	var center = Vector2(joystick_radius, joystick_radius)
+	var offset = touch_pos - center
+	
+	# 限制在摇杆范围内
+	var max_distance = joystick_radius - stick_radius
+	if offset.length() > max_distance:
+		offset = offset.normalized() * max_distance
+	
+	stick_position = offset
+	
+	# 更新视觉位置
+	stick_circle.position = center + offset - Vector2(stick_radius, stick_radius)
+	
+	# 计算输出方向
+	var normalized_offset = offset / max_distance
+	if normalized_offset.length() < dead_zone:
+		output_direction = Vector2.ZERO
+	else:
+		output_direction = normalized_offset.normalized() * ((normalized_offset.length() - dead_zone) / (1.0 - dead_zone))
+
+func _reset_stick():
+	"""重置摇杆到中心"""
+	stick_position = Vector2.ZERO
+	output_direction = Vector2.ZERO
+	
+	var center = Vector2(joystick_radius, joystick_radius)
+	stick_circle.position = center - Vector2(stick_radius, stick_radius)
+
+## 获取当前方向
+func get_direction() -> Vector2:
+	"""
+	获取摇杆当前方向
+	@return: 归一化的方向向量
+	"""
+	return output_direction