Difference between revisions of "random"

From Bohemia Interactive Community
Jump to navigation Jump to search
m (formatted syntax)
Line 8: Line 8:
  
 
|[[Image:bellcurve.jpg|right|200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br><br>
 
|[[Image:bellcurve.jpg|right|200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br><br>
Since Arma 3 v1.55.133393 alternative syntax is added, allowing to define [https://en.wikipedia.org/wiki/Normal_distribution Gaussian Distribution] params. Uses the same method as [[setTriggerTimeout]] command. Quite useful for spawning loot for example, making more valuable items more rare. |= Description
+
Since Arma 3 v1.55.133393 alternative syntax is added, allowing to define [https://en.wikipedia.org/wiki/Normal_distribution Gaussian Distribution] params. Uses the same method as [[setTriggerTimeout]] command. Quite useful for spawning loot for example, making more valuable items more rare.<br><br>
 +
Since Arma 3 v1.67.139663 an alternative syntax is available, allowing to generate semi-random number based on provided seed.<br><br>
 +
Since Arma 3 v1.67.139663 an alternative syntax is available, 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. |= Description
 +
 
 
____________________________________________________________________________________________
 
____________________________________________________________________________________________
  
 
|'''random''' x |= Syntax
 
|'''random''' x |= Syntax
 
 
|p1= x: [[Number]]
 
|p1= x: [[Number]]
 
 
| [[Number]] |= Return value
 
| [[Number]] |= Return value
  
 
|s2= '''random''' [min, mid, max] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Since Arma 3 v1.55.133393'')|= Syntax
 
|s2= '''random''' [min, mid, max] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Since Arma 3 v1.55.133393'')|= Syntax
 
 
|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]] |= Return value
 +
 +
|s3= seed '''random''' x &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Since Arma 3 v1.67.139663'')|= Syntax
 +
|p31= seed: [[Number]] |=
 +
|p32= x: [[Number]] |=
 +
|r3= [[Number]] |= Return value
 +
 +
|s4= seed '''random''' [x,y] &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(''Since Arma 3 v1.67.139663'')|= Syntax
 +
|p41= seed: [[Number]] |=
 +
|p42=  [x, y]: [[Array]] |=
 +
|p43= x: [[Number]] |=
 +
|p44= y: [[Number]] |=
 +
|r4= [[Number]] |= Return value
  
| r2= [[Number]] |= Return value
 
 
____________________________________________________________________________________________
 
____________________________________________________________________________________________
 
   
 
   

Revision as of 14:42, 13 December 2016

Template:Command

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)