Difference between revisions of "random"
Jump to navigation
Jump to search
Lou Montana (talk  contribs) m (Use since template) 
Lou Montana (talk  contribs) m (Text replacement  "{{since" to "{{Since") 

(11 intermediate revisions by 2 users not shown)  
Line 5:  Line 5:  
1.00Game version=  1.00Game version=  
+  
+  gr1= Math GROUP1=  
____________________________________________________________________________________________  ____________________________________________________________________________________________  
−  [[Image:bellcurve.jpgright200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br  +  [[Image:bellcurve.jpgright200px]] Random real (floating point) value from 0 (inclusive) to x (not inclusive).<br> 
−  <br  +  <br> 
−  Since Arma 3 v1.55.133393 alternative syntax is added, allowing the definition of [https://en.wikipedia.org/wiki/Normal_distribution Gaussian Distribution]<ref>Technically, it is a rescaled [https://en.wikipedia.org/wiki/Bates_distribution Bates distribution] with n = 4. The distribution is split in two at its midpoint and scaled linearly such that its maximum lies at the specified midpoint.</ref> params. Uses the same method as [[setTriggerTimeout]] command. Quite useful for spawning loot for example, making more valuable items more rare ('''Alternative Syntax 1''')<br  +  Since Arma 3 v1.55.133393 alternative syntax is added, allowing the definition of [https://en.wikipedia.org/wiki/Normal_distribution Gaussian Distribution]<ref>Technically, it is a rescaled [https://en.wikipedia.org/wiki/Bates_distribution Bates distribution] with n = 4. The distribution is split in two at its midpoint and scaled linearly such that its maximum lies at the specified midpoint.</ref> params. Uses the same method as [[setTriggerTimeout]] command. Quite useful for spawning loot for example, making more valuable items more rare ('''Alternative Syntax 1''')<br><br> 
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 semirandom number based on provided seed ('''Alternative Syntax 2''')  * allowing to generate semirandom number based on provided seed ('''Alternative Syntax 2''')  
Line 22:  Line 24:  
____________________________________________________________________________________________  ____________________________________________________________________________________________  
−  s2= [[random]] [min, mid, max] {{  +  s2= [[random]] [min, mid, max] {{Sincearma31.55.133393y}} Syntax 2= 
p21= [min, mid, max]: [[Array]] Parameter 21=  p21= [min, mid, max]: [[Array]] Parameter 21=  
p22= min: [[Number]] Parameter 22=  p22= min: [[Number]] Parameter 22=  
Line 30:  Line 32:  
____________________________________________________________________________________________  ____________________________________________________________________________________________  
−  s3= seed [[random]] x {{  +  s3= seed [[random]] x {{Sincearma31.67.139663y}} Syntax 3= 
p41= seed: [[Number]] Parameter 41=  p41= seed: [[Number]] Parameter 41=  
p42= x: [[Number]] Parameter 42=  p42= x: [[Number]] Parameter 42=  
Line 36:  Line 38:  
____________________________________________________________________________________________  ____________________________________________________________________________________________  
−  s4= seed [[random]] [x, y] {{  +  s4= seed [[random]] [x, y] {{Sincearma31.67.139663y}} Syntax 4= 
p61= seed: [[Number]] Parameter 61=  p61= seed: [[Number]] Parameter 61=  
p62= [x, y]: [[Array]] position on the [https://en.wikipedia.org/wiki/Perlin_noise Perlin noise texture] Parameter 62=  p62= [x, y]: [[Array]] position on the [https://en.wikipedia.org/wiki/Perlin_noise Perlin noise texture] Parameter 62=  
Line 54:  Line 56:  
<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{{Sincearma31.55.133393}}}} 
_random = [[selectRandom]] _array;</code> Example 4=  _random = [[selectRandom]] _array;</code> Example 4=  
____________________________________________________________________________________________  ____________________________________________________________________________________________  
−    +   [[selectRandom]], [[selectRandomWeighted]] See also= 
}}  }}  
Line 67:  Line 69:  
[[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}}}}]]  
−  +  {{GameCategoryarma1Scripting Commands}}  
−  +  {{GameCategoryarma2Scripting Commands}}  
−  +  {{GameCategoryarma3Scripting Commands}}  
−  +  {{GameCategorytkohScripting Commands}}  
−  
<! CONTINUE Notes >  <! CONTINUE Notes >  
Line 83:  Line 84:  
This will yield numbers between 100 and 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.  * 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.<br  +  * The number returned is unlikely to be a whole number.<br> 
To return a whole number use either '''[[round]]''', '''[[ceil]]''' or '''[[floor]]''' together with [[random]]:  To return a whole number use either '''[[round]]''', '''[[ceil]]''' or '''[[floor]]''' together with [[random]]:  
<code>x = round(random 5) will return 0,1,2,3,4 or 5. (nonuniform distribution, 0 and 5 are half as likely to be selected than any of the other numbers)  <code>x = round(random 5) will return 0,1,2,3,4 or 5. (nonuniform distribution, 0 and 5 are half as likely to be selected than any of the other numbers)  
Line 92:  Line 93:  
<dt class="note">[[User:Lou MontanaLou Montana]]</dt>  <dt class="note">[[User:Lou MontanaLou Montana]]</dt>  
<dd class="note">  <dd class="note">  
−  {{{!}}class="  +  {{{!}}class="wikitable" 
{{!}}+ Repartition comparison  {{!}}+ Repartition comparison  
! Formula  ! Formula 
Revision as of 20:37, 11 January 2021
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.
x = round(random 5) will return 0,1,2,3,4 or 5. (nonuniform 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%