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{{ | {{RV|type=command | ||
| ofp | | ofp | ||
|1.00| | |1.00 | ||
|gr1= Math | |||
|[[Image:bellcurve.jpg|right|200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br> | |[[Image:bellcurve.jpg|right|200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br> | ||
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Since Arma 3 v1.67.139663 two alternative syntaxes are available: | Since Arma 3 v1.67.139663 two alternative syntaxes are available: | ||
* allowing to generate semi-random number based on provided seed ('''Alternative Syntax 2''') | * allowing to generate semi-random number based on provided seed ('''Alternative Syntax 2''') | ||
* generating pseudo-random [https://en.wikipedia.org/wiki/Perlin_noise noise texture] based on provided seed and returning a single number between 0 (included) and 1 (excluded) at supplied ''x'' and ''y'' coordinates ('''Alternative Syntax 3''') | * generating pseudo-random [https://en.wikipedia.org/wiki/Perlin_noise noise texture] based on provided seed and returning a single number between 0 (included) and 1 (excluded) at supplied ''x'' and ''y'' coordinates ('''Alternative Syntax 3''') | ||
| [[random]] x | | [[random]] x | ||
|p1= x: [[Number]] | |p1= x: [[Number]] | ||
| [[Number]] | | [[Number]] | ||
|s2= [[random]] [min, mid, max] {{ | |s2= [[random]] [min, mid, max] {{Since|arma3|1.55.133393|y}} | ||
|p21= [min, mid, max]: [[Array]] | |p21= [min, mid, max]: [[Array]] | ||
|p22= min: [[Number]] | |p22= min: [[Number]] | ||
|p23= mid: [[Number]] | |p23= mid: [[Number]] | ||
|p24= max: [[Number]] | |p24= max: [[Number]] | ||
|r2= [[Number]] | |r2= [[Number]] | ||
|s3= seed [[random]] x {{ | |s3= seed [[random]] x {{Since|arma3|1.67.139663|y}} | ||
|p41= seed: [[Number]] | |p41= seed: [[Number]] | ||
|p42= x: [[Number]] | |p42= x: [[Number]] | ||
|r3= [[Number]] - value from 0 to x | |r3= [[Number]] - value from 0 to x | ||
|s4= seed [[random]] [x, y] {{ | |s4= seed [[random]] [x, y] {{Since|arma3|1.67.139663|y}} | ||
|p61= seed: [[Number]] | |p61= seed: [[Number]] | ||
|p62= [x, y]: [[Array]] position on the [https://en.wikipedia.org/wiki/Perlin_noise Perlin noise texture] | |p62= [x, y]: [[Array]] position on the [https://en.wikipedia.org/wiki/Perlin_noise Perlin noise texture] | ||
|p63= x: [[Number]] | |p63= x: [[Number]] | ||
|p64= y: [[Number]] | |p64= y: [[Number]] | ||
|r4= [[Number]] - value from 0 to 1 | |r4= [[Number]] - value from 0 to 1 | ||
|x1= <code>_rNumber = [[random]] 1;</code> | |x1= <code>_rNumber = [[random]] 1;</code> | ||
|x2= <code>_rNumber = [[random]] -10;</code> | |x2= <code>_rNumber = [[random]] -10;</code> | ||
|x3= Generate a random position inside a circle (see also [[Example Code: Random Area Distribution]]) | |x3= Generate a random position inside a circle (see also [[Example Code: Random Area Distribution]]) | ||
<code>_center [[getPos]] [<nowiki/>_radius * [[sqrt]] [[random]] 1, [[random]] 360];</code> | <code>_center [[getPos]] [<nowiki/>_radius * [[sqrt]] [[random]] 1, [[random]] 360];</code> | ||
|x4= To select random value from an array: | |x4= To select random value from an array: | ||
<code>_array = ["apples", "pears", "bananas", "M16"]; | <code>_array = ["apples", "pears", "bananas", "M16"]; | ||
_random = _array [[select]] [[floor]] [[random]] [[count]] _array; | _random = _array [[select]] [[floor]] [[random]] [[count]] _array; | ||
{{cc|{{ | {{cc|{{Since|arma3|1.55.133393}}}} | ||
_random = [[selectRandom]] _array;</code> | _random = [[selectRandom]] _array;</code> | ||
| | |seealso= [[selectRandom]], [[selectRandomWeighted]] | ||
}} | }} | ||
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]] | [[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]] | ||
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[[Category:Scripting Commands OFP 1.96|{{uc:{{PAGENAME}}}}]] | [[Category:Scripting Commands OFP 1.96|{{uc:{{PAGENAME}}}}]] | ||
[[Category:Scripting Commands OFP 1.99|{{uc:{{PAGENAME}}}}]] | [[Category:Scripting Commands OFP 1.99|{{uc:{{PAGENAME}}}}]] | ||
{{GameCategory|arma1|Scripting Commands}} | |||
{{GameCategory|arma2|Scripting Commands}} | |||
{{GameCategory|arma3|Scripting Commands}} | |||
{{GameCategory|tkoh|Scripting Commands}} | |||
<!-- CONTINUE Notes --> | <!-- CONTINUE Notes --> | ||
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<dt class="note">[[User:Lou Montana|Lou Montana]]</dt> | <dt class="note">[[User:Lou Montana|Lou Montana]]</dt> | ||
<dd class="note"> | <dd class="note"> | ||
{{{!}}class=" | {{{!}}class="wikitable" | ||
{{!}}+ Repartition comparison | {{!}}+ Repartition comparison | ||
! Formula | ! Formula |
Revision as of 00:51, 17 February 2021
Description
- Description:
- Description needed
- Groups:
- Math
Syntax 1
- Syntax:
- Syntax needed
- Parameters:
- x: Number
- Return Value:
- Return value needed
Syntax 2
- Syntax:
- random [min, mid, max] Template:Since
- Parameters:
- [min, mid, max]: Array
- min: Number
- mid: Number
- max: Number
- Return Value:
- Number
Syntax 3
- Syntax:
- seed random x Template:Since
- Parameters:
- seed: Number
- x: Number
- Return Value:
- Number - value from 0 to x
Syntax 4
- 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; // Template:Since _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.
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%