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Introduced with Operation Flashpoint version 1.00
  

点击图片可看到更多讯息

开始使用于

游戏:
Operation Flashpoint
版本:
1.00

描述

描述:

Random real (floating point) value from 0 (inclusive) to x (not inclusive).

Since Arma 3 v1.55.133393 alternative syntax is added, allowing to define Gaussian Distribution params. Uses the same method as setTriggerTimeout command. Quite useful for spawning loot for example, making more valuable items more rare.

基本句法

句法:
random x
参数:
x: Number
返回值:
Number

替代句法

句法:
random [min, mid, max]        Since Arma 3 v1.55.133393
参数:
[min, mid, max]: Array

min: Number

mid: Number

max: Number
返回值:
Number

范例

范例1:
_rNumber = random 1;

范例2:
_rNumber = random -10;

范例3:
To select random value from an array: _array = ["apples", "pears", "bananas", "M16"]; _random = _array select floor random count _array; // or since Arma 3 v1.55.133393 _random = selectRandom _array;

范例4:
Compare (each command was executed 100000 times to gather statistics):floor random 10; // 0 - 10099 (10%) // 1 - 10040 (10%) // 2 - 10154 (10%) // 3 - 9910 (10%) // 4 - 10023 (10%) // 5 - 9937 (10%) // 6 - 10118 (10%) // 7 - 9716 (10%) // 8 - 9986 (10%) // 9 - 10017 (10%)

floor random [0,5,10]; // 0 - 109 (0%) // 1 - 1604 (2%) // 2 - 6839 (7%) // 3 - 16671 (17%) // 4 - 24706 (25%) // 5 - 24702 (25%) // 6 - 16626 (17%) // 7 - 6925 (7%) // 8 - 1702 (2%) // 9 - 116 (0%)

floor random [0,10,0]; // 0 - 19 (0%) // 1 - 209 (0%) // 2 - 817 (1%) // 3 - 2384 (2%) // 4 - 4841 (5%) // 5 - 8976 (9%) // 6 - 14067 (14%) // 7 - 18955 (19%) // 8 - 23605 (24%) // 9 - 26127 (26%)

floor random [0,10,5]; // 0 - 11 (0%) // 1 - 98 (0%) // 2 - 430 (0%) // 3 - 1149 (1%) // 4 - 2384 (2%) // 5 - 4546 (5%) // 6 - 8612 (9%) // 7 - 16283 (16%) // 8 - 28393 (28%) // 9 - 38094 (38%)

额外资讯

多人游戏:
-
也可以看看:

Math CommandsselectRandom

注意事项

此处撰写句法皆为可行用法. 可到官网[1]专页回报错误. 你可以使用讨论页面或是论坛来进行讨论.
新增注意事项 | 如何新增?

Notes

Posted on July 12, 2015 - 20:32 (UTC)
Hcpookie
Random selections including negative numbers can be obtained via:

_Xrnd = round(random 200) -100;

This will yield numbers between -100 and 100.

  • Be careful using random numbers in multiplayer, each client will come up with a different result. See multiplayer tutorials for more general information about locality.
  • The number returned is unlikely to be a whole number.
    To return a whole number use either round, ceil or floor together with random:
x=round(random 5) will return 0,1,2,3,4 or 5. (non-uniform distribution, 0 and 5 are half as likely to be selected than any of the other numbers)

x=floor(random 5) will return 0,1,2,3 or 4. (uniform distribution, all numbers have the same probability of being selected)
x=ceil(random 5) will return 0,1,2,3,4 or 5. (0 is very unlikely, but possible, as ceil 0 is 0)

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