44 lines
1.2 KiB
GDScript
44 lines
1.2 KiB
GDScript
extends Object
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const NumberUtils = preload("res://zfoo/util/NumberUtils.gd")
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const StringUtils = preload("res://zfoo/util/StringUtils.gd")
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const random = [false, null]
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# 单例模式
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static func getRandom() -> RandomNumberGenerator:
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if random[0]:
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return random[1]
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var randomGenerator = RandomNumberGenerator.new()
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randomGenerator.randomize()
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random[1] = randomGenerator
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return randomGenerator
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static func randomBoolean() -> bool:
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return 1 == getRandom().randi_range(0, 2)
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# 获得随机数[-2^32, 2^32)
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static func randomInt() -> int:
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return randomIntRange(NumberUtils.MIN_INT, NumberUtils.MAX_INT)
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# 获得指定范围内的随机数 [0,limit)
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static func randomIntLimit(limit: int) -> int:
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return randomIntRange(0, limit)
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# 获得随机数[-2^32, 2^32)
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static func randomIntRange(from: int, to: int) -> int:
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if from < NumberUtils.MIN_INT:
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push_error(StringUtils.format("from [{}] shoud be >= [{}]", [from, NumberUtils.MIN_INT]))
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return 0
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if to > NumberUtils.MAX_INT:
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push_error(StringUtils.format("to [{}] should be <= [{}]", [from, NumberUtils.MAX_INT]))
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return 0
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return getRandom().randi_range(from, to - 1)
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static func randomEle(array: Array):
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return array[randomIntLimit(array.size())]
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