refactor(MathTool): 重命名随机数相关方法以提高可读性

将 randv2_range 重命名为 randomVector2In，randc_from 重命名为 randomChoiceFrom，randc_from_weights 重命名为 randChoiceWeightsFrom，并新增 randomRingPoint 方法

scripts/Tools/Managers/CameraManager.gd

@@ -13,7 +13,7 @@ func _ready():
 func _physics_process(_delta):
 	if is_instance_valid(UIState.player):
 		position = UIState.player.position
-		position += MathTool.randv2_range(shakeIntensity)
+		position += MathTool.randomVector2In(shakeIntensity)
 
 static func shake(millseconds: float, intensity: float = 10, steper: Callable = func(currentValue, _totalValue, _restPercent): return currentValue):
 	var startTime = WorldManager.getTime()

scripts/Tools/MathTool.gd

@@ -2,21 +2,23 @@ class_name MathTool
 
 static func rate(value: float) -> bool:
 	return randf() < value
-static func randv2_range(offset: float):
+static func randomVector2In(offset: float):
 	return Vector2(
 		randf_range(-offset, offset),
 		randf_range(-offset, offset)
 	)
-static func randc_from(array: Array):
+static func randomRingPoint(innerRadius: float, outerRadius: float):
+	return Vector2.from_angle(randf_range(0, 2 * PI)) * randf_range(innerRadius, outerRadius)
+static func randomChoiceFrom(array: Array):
 	return array[randi() % array.size()]
-static func randc_from_weights(indexes: Array, weights: Array[int]):
+static func randChoiceWeightsFrom(indexes: Array, weights: Array[int]):
 	var totals: Array = []
 	var index = 0
 	for i in indexes:
 		for j in range(weights[index]):
 			totals.append(i)
 		index += 1
-	return randc_from(totals)
+	return randomChoiceFrom(totals)
 static func signBeforeStr(value: float):
 	return ("+" if value > 0 else "-" if value < 0 else "") + str(abs(value))
 static func percent(value: float):