setVariable: Difference between revisions

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{{Command|Comments=
{{RV|type=command
____________________________________________________________________________________________


| arma |Game name=
|game1= arma1
|version1= 1.00


|1.00|Game version=
|game2= arma2
|version2= 1.00


|arg= global|Arguments in MP=
|game3= arma2oa
|eff= local |Effects in MP=
|version3= 1.50
____________________________________________________________________________________________


| Set variable to given value in the variable space of given element.<br />
|game4= tkoh
To remove a variable, set it to [[nil]] (e.g. {{Inline code|[[player]] [[setVariable]] ["varname", [[nil]]<nowiki>]</nowiki>;}}).<br />
|version4= 1.00
When variable is set on [[Task]], it is not actually set on task itself, but on FSM attached to the task. So if there is no FSM [[setVariable]] will not work.<br />
 
All supported variable types:
|game5= arma3
|version5= 0.50
 
|arg= global
 
|eff= local
 
|gr1= Variables
 
|gr2= Namespaces
 
|gr3= Multiplayer
 
|descr= Set variable to given value in the variable space of given element. Can be used to broadcast variables over the network.<br>
To remove a variable, set it to [[nil]] (see {{Link|#Example 5}}) - note that this does not work on [[Object]] and [[createLocation|scripted]] [[Location]] namespaces (the variable will be set to [[nil]] but will remain listed by [[allVariables]]).
 
{{Feature|warning|
[[missionNamespace]], [[uiNamespace]], [[parsingNamespace]] and [[profileNamespace]] variables '''cannot''' be named as commands - e.g <sqf inline>missionNamespace setVariable ["west", 123];</sqf> conflicts with the [[west]] command and will result in a {{hl|Reserved variable in expression}} error, [[west]] being a scripting command (other namespaces do not have such limitation).
See also [[:Category:Scripting Commands|all available script commands]].
}}
 
|s1= varspace [[setVariable]] [name, value, public]
 
|p1= varspace: variable space in which variable can be set. Can be one of:
{{Columns|2|
* [[Namespace]]
* [[Namespace]]
* [[Object]]
* [[Object]]
** {{Icon|checked}} {{GVI|arma3|2.10|size= 0.75}} {{hl|CfgAmmo}} [[Object]]s (bullets, mines etc)
** {{Icon|unchecked}} {{hl|CfgNonAIVehicles}} [[Object]]s (butterflies, proxies etc - {{hl|EmptyDetector}}s (triggers) work)
** {{Icon|unchecked}} {{hl|#local}} [[Object]]s ({{hl|#lightpoint}}, {{hl|#soundsource}} etc - see [[createVehicleLocal]])
* [[Group]]
* [[Group]]
* [[Team Member]]
* [[Location]] ({{GVI|arma3|2.10|size= 0.75}} [[createLocation|scripted ones]] only)
* [[Task]]
* {{GVI|arma2|1.00|size= 0.75}} [[Team Member]]
* [[Location]]
* {{GVI|arma2|1.00|size= 0.75}} [[Task]] - ''value'' will actually be set on the [[Task]]'s [[FSM]] '''if''' it exists.
* [[Control]] (since Arma 3 v1.55.133553)
* {{GVI|arma3|0.50|size= 0.75}} [[Control]]
* [[Display]] (since Arma 3 v1.55.133553)
* {{GVI|arma3|0.50|size= 0.75}} [[Display]]
}}


{{Feature arma3|In Arma 3 it is possible to broadcast [[nil]] value}}
|p2= name: [[String]] - variable name ([[Identifier]])
{{Warning | [[missionNamespace]], [[uiNamespace]], [[uiNamespace]] and [[profileNamespace]] variable names could be any string, except for the reserved names, which are normally script command names. For example: <tt>[[missionNamespace]] setVariable ["west", 123];</tt> will result in error:
Error in expression <missionNamespace setVariable ["west", 123];>
    Error position: <setVariable ["west", 123];>
    Error Reserved variable in expression 
as [[west]] is a script command. Other varspaces do not have such limitation. You can always check for all available script commands by running [[Arma_3_Utilities#Script_Commands | utility number 5]]}} |Description=
____________________________________________________________________________________________


| varspace [[setVariable]] [name, value] |Syntax 1=
|p3= value: [[Anything]] - variable value


|p1= varspace: [[Namespace]], [[Object]], [[Group]], [[Team_Member]], [[Task]], [[Location]], [[Control]], [[Display]] - variable space in which variable can be set |Parameter 1=
|p4= public - (Optional, default [[false]]) can be one of:
|p2= [name, value]: [[Array]] |Parameter 2=
* [[Boolean]] - if set to [[true]], the variable is broadcast globally and is persistent ([[Multiplayer Scripting#Join In Progress|JIP]] compatible) {{Icon|globalEffect|32}}
|p3= name: [[String]] - variable name |Parameter 3=
* [[Number]] - the variable is only set on the client with the given [[Multiplayer Scripting#Machine network ID|Machine network ID]]. If the number is negative, the variable is set on every client except for the one with the given ID.
|p4= value: [[Anything]] - variable value |Parameter 4=
* [[Array]] of [[Number]]s - array of [[Multiplayer Scripting#Machine network ID|Machine network IDs]]


| [[Nothing]] |Return value=
This parameter is only available if the '''varspace''' parameter is a [[Namespace]], [[Object]] or [[Group]]. Furthermore, only the following [[:Category: Data Types|Data Types]] can be broadcast:
{{{!}} class="wikitable align-center"
! Type
{{!}} [[Number]]
{{!}} [[Boolean]]
{{!}} [[Object]]
{{!}} [[Group]]
{{!}} [[String]]
{{!}} [[Structured Text|Text]]
{{!}} [[Array]]
{{!}} [[Code]]
{{!}} [[Nothing]] ([[nil]])
{{!}} [[HashMap]]
{{!}}-
! Since
{{!}} colspan="6" {{!}} {{GVI|arma1|1.00}}
{{!}} colspan="2" {{!}} {{GVI|arma1|1.09}}
{{!}} {{GVI|arma3|1.26}}
{{!}} {{GVI|arma3|2.02}}
{{!}}}
|p4since= arma2 1.00


| s2 = varspace [[setVariable]] [name, value, public] |Syntax 2=
|r1= [[Nothing]]


|p21= varspace: [[missionNamespace]], [[Object]] or [[Group]] - variable space in which variable can be set |Parameter 21=
|x1= <sqf>_myTruck setVariable ["TAG_myPublicVariable", 123, true];</sqf>
|p22= [name, value, public]: [[Array]] |Parameter 22=
|p23= name: [[String]] - variable name |Parameter 23=
|p24= value: [[Anything]] - variable value (if public is [[true]], check [[publicVariable]] for what types are supported for broadcast) |Parameter 24=
|p25= public: [[Boolean]], [[Number]] or [[Array]] of [[Number]]s
* [[Boolean]] - when [[true]], the variable broadcast is global and persistent {{EffArg|cmd|eff|glob}}
* [[Number]] - the variable is set only on the client of given [[owner]] ([[clientOwner]]) id, or if id is negative, the variable is set on every client except the given one
* [[Array]] of [[Number]]s - array of [[owner]] ([[clientOwner]]) ids |Parameter 25=


|r2= [[Nothing]] |Return value 2=
|x2= <sqf>_myTruck setVariable ["TAG_myLocalVariable", ["321", _var], owner driver _myTruck];</sqf>
____________________________________________________________________________________________


|x1= <code>_myTruck [[setVariable]] ["myPublicVariable", 123, [[true]]];</code> |Example 1=
|x3= <sqf>missionNamespace setVariable ["TAG_myName", "Brian"];
hint TAG_myName; // hints "Brian"</sqf>


|x2= <code>_myTruck [[setVariable]] ["myLocalVariable", ["321", _var], [[false]]];</code> |Example 2=
|x4= Get the current value of a variable or, if it is undefined, define it and then get the value:
 
<sqf>
|x3= <code>[[missionNamespace]] [[setVariable]] ["myName", "KK"];
private _var = missionNamespace getVariable "VarName";
[[hint]] myName; //KK</code> |Example 3=
if (isNil "_var") then
 
|x4= Get current value of a variable and if it is undefined, define it and get the defined value:<code>[[private]] _var = [[missionNamespace]] [[getVariable]] "varName";
[[if]] ([[isNil]] "_var") [[then]]
{
{
[[missionNamespace]] [[setVariable]] ["varName", 123];
_var = 123;
_var = 123;
missionNamespace setVariable ["VarName", _var];
};
};
// _var here will contain current value of the variable varName</code> |Example 4=
// _var now contains the current value of the missionNamespace's variable varName
</sqf>


|mp= The variable space of the object is '''local to each client''' and '''by default''' changes are not broadcast.<br />
|x5= Remove {{hl|TAG_myPublicVariable}} from [[missionNamespace]] (globally):
Since Arma 2: '''If''' the '''public''' parameter for supported types is ''<tt>true</tt>'', the value will be '''synchronized''' also for a [[Join In Progress|JIP]] player. |Multiplayer=
<sqf>missionNamespace setVariable ["TAG_myPublicVariable", nil, true];</sqf>


| [[getVariable]], [[allVariables]], [[setFSMVariable]], [[Multiplayer Scripting#Join In Progress|Multiplayer Scripting]]|See also=
|seealso= [[getVariable]] [[allVariables]] [[setFSMVariable]]
}}
}}


<h3 style="display:none">Notes</h3>
{{Note
<dl class="command_description">
|user= Killswitch
|timestamp= 20070818095100
|text= According to {{User|Suma}}, beginning with {{Name|arma1|short}} version 1.08:
{{Feature|quote|
[[setVariable]] now should work on any entity which can be targeted by AI, including soldier and game logic units. This includes most buildings, but not other static objects.
'''Using it with buildings one should be aware the building may be discarded because of streaming'''. In such case the variable space is lost. When used for buildings, the storage should therefore be considered non-reliable.
| {{User|Suma}}
| Talk:setVariable#setVariable local or global in Multiplayer}}
}}


</dl>
{{Note
|user= Commy2
|timestamp= 20151209201800
|text= This command does not work with CfgAmmo or CfgNonAIVehicles objects, like bullets, mines or butterflies.
}}


<h3 style="display:none">Bottom Section</h3>
{{Note
[[Category:Scripting Commands|{{uc:{{PAGENAME}}}}]]
|user= Leopard20
[[Category:Scripting Commands OFP Elite |{{uc:{{PAGENAME}}}}]]
|timestamp= 20220323085950
[[Category:Scripting Commands ArmA|{{uc:{{PAGENAME}}}}]]
|text= Since {{GVI|arma3|2.10}} [[setVariable]] works on CfgAmmo objects (such as bullets, missiles, grenades, mines, etc) as well.
[[Category:Command_Group:_Locations|{{uc:{{PAGENAME}}}}]]
}}
[[Category:Command_Group:_Object_Information|{{uc:{{PAGENAME}}}}]]
[[Category:Command_Group:_Variables|{{uc:{{PAGENAME}}}}]]
[[Category:Scripting Commands ArmA2|{{uc:{{PAGENAME}}}}]]
[[Category:Scripting_Commands_Take_On_Helicopters|{{uc:{{PAGENAME}}}}]]
[[Category:Scripting Commands Arma 3|{{uc:{{PAGENAME}}}}]]
 
<!-- CONTINUE Notes -->
<dl class="command_description">
<dd class="notedate">Posted on December 9, 2015 - 20:18 (UTC)</dd>
<dt class="note">[[User:Commy2|Commy2]]</dt>
<dd class="note">
This command does not work with CfgAmmo or CfgNonAIVehicles objects, like bullets, mines or butterflies (probably because they are [[local]] objects [[User:Killzone Kid|Killzone Kid]] ([[User talk:Killzone Kid|talk]]) 11:25, 9 July 2017 (CEST)).
</dd>
</dl>
<!-- DISCONTINUE Notes -->

Revision as of 23:37, 3 March 2024

Hover & click on the images for description

Description

Description:
Set variable to given value in the variable space of given element. Can be used to broadcast variables over the network.
To remove a variable, set it to nil (see Example 5) - note that this does not work on Object and scripted Location namespaces (the variable will be set to nil but will remain listed by allVariables).
missionNamespace, uiNamespace, parsingNamespace and profileNamespace variables cannot be named as commands - e.g missionNamespace setVariable ["west", 123]; conflicts with the west command and will result in a Reserved variable in expression error, west being a scripting command (other namespaces do not have such limitation). See also all available script commands.
Groups:
VariablesNamespacesMultiplayer

Syntax

Syntax:
varspace setVariable [name, value, public]
Parameters:
varspace: variable space in which variable can be set. Can be one of:
name: String - variable name (Identifier)
value: Anything - variable value
since Logo A2.png1.00
public - (Optional, default false) can be one of: This parameter is only available if the varspace parameter is a Namespace, Object or Group. Furthermore, only the following Data Types can be broadcast:
Type Number Boolean Object Group String Text Array Code Nothing (nil) HashMap
Since Logo A1 black.png1.00 Logo A1 black.png1.09 Arma 3 logo black.png1.26 Arma 3 logo black.png2.02
Return Value:
Nothing

Examples

Example 1:
_myTruck setVariable ["TAG_myPublicVariable", 123, true];
Example 2:
_myTruck setVariable ["TAG_myLocalVariable", ["321", _var], owner driver _myTruck];
Example 3:
missionNamespace setVariable ["TAG_myName", "Brian"]; hint TAG_myName; // hints "Brian"
Example 4:
Get the current value of a variable or, if it is undefined, define it and then get the value:
private _var = missionNamespace getVariable "VarName"; if (isNil "_var") then { _var = 123; missionNamespace setVariable ["VarName", _var]; }; // _var now contains the current value of the missionNamespace's variable varName
Example 5:
Remove TAG_myPublicVariable from missionNamespace (globally):
missionNamespace setVariable ["TAG_myPublicVariable", nil, true];

Additional Information

See also:
getVariable allVariables setFSMVariable

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
Killswitch - c
Posted on Aug 18, 2007 - 09:51 (UTC)
According to Suma, beginning with ArmA version 1.08:
«
« setVariable now should work on any entity which can be targeted by AI, including soldier and game logic units. This includes most buildings, but not other static objects. Using it with buildings one should be aware the building may be discarded because of streaming. In such case the variable space is lost. When used for buildings, the storage should therefore be considered non-reliable. » – Suma (source)
Commy2 - c
Posted on Dec 09, 2015 - 20:18 (UTC)
This command does not work with CfgAmmo or CfgNonAIVehicles objects, like bullets, mines or butterflies.
Leopard20 - c
Posted on Mar 23, 2022 - 08:59 (UTC)
Since Arma 3 logo black.png2.10 setVariable works on CfgAmmo objects (such as bullets, missiles, grenades, mines, etc) as well.