From Bohemia Interactive Community
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Description
- Description:
- Description needed
- Groups:
- Math
Syntax 1
- Syntax:
- Syntax needed
- Parameters:
- x: Number
- Return Value:
- Return value needed
- Syntax:
- random [min, mid, max] Template:Since
- Parameters:
- [min, mid, max]: Array
- min: Number
- mid: Number
- max: Number
- Return Value:
- Number
- Syntax:
- seed random x Template:Since
- Parameters:
- seed: Number
- x: Number
- Return Value:
- Number - value from 0 to x
- Syntax:
- seed random [x, y] Template:Since
- Parameters:
- seed: Number
- [x, y]: Array position on the Perlin noise texture
- x: Number
- y: Number
- Return Value:
- Number - value from 0 to 1
Examples
- Example 1:
_rNumber = random 1;- Example 2:
_rNumber = random -10;- Example 3:
- Generate a random position inside a circle (see also Example Code: Random Area Distribution)
_center getPos [_radius * sqrt random 1, random 360]; - Example 4:
- To select random value from an array:
_array = ["apples", "pears", "bananas", "M16"];
_random = _array select floor random count _array;
_random = selectRandom _array;
Additional Information
- See also:
- selectRandomselectRandomWeighted
Notes
-
Report bugs on the Feedback Tracker and/or discuss them on the Arma Discord or on the Forums.
Only post proven facts here!
Add Note
- 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)
- Posted on July 22, 2018 - 12:58 (UTC+2)
- Lou Montana
-
Repartition comparison
| Formula
|
0
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
| floor random 10;
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
10%
|
| floor random [0, 5, 10]
|
0%
|
2%
|
7%
|
17%
|
25%
|
25%
|
17%
|
7%
|
2%
|
0%
|
| floor random [0, 10, 0]
|
0%
|
0%
|
1%
|
2%
|
5%
|
9%
|
14%
|
19%
|
24%
|
26%
|
| floor random [0, 10, 5]
|
0%
|
0%
|
0%
|
1%
|
2%
|
5%
|
9%
|
16%
|
28%
|
38%
|
