Triggers: Difference between revisions

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[[Image:Trigger_Window.jpg|300px|thumb|right|Trigger Window]]
#REDIRECT [[Trigger]]
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==Introduction==
See [[ArmA:_Mission_Editor#Triggers_Mode_.28F3.29|ArmA:Mission Editor - Triggers]] for a thorough overview of triggers and it's fields for activation, effects, etc.<BR>
<BR>
Triggers are an essential function for mission designers. A trigger (sometimes called a sensor) allows a mission designer to control events within a mission. Some common uses for triggers are controlling the timing of squad moves, camera control in cutscene, or even play the appropriate music when the time is right.
 
==Properties==
 
===Activation===
 
There are several combinations that can be created to activate the trigger. The trigger can be used to check if [[east]] or [[west]] is ''present'', ''not present'', or even ''detected by'' other sides within the trigger. A trigger can also be used to set up ''radio'' commands.
(Be aware though, that a unit that has been [[setCaptive]] will not trigger any ''detected'' events.)
 
A trigger can be linked to one particular unit or group by going into Group Mode (F2), and dragging a line from the trigger to the desired unit.  After this the Activation field will be set to "Vehicle". It can then be changed to either "Whole group", "Group leader" or "Any group member".
 
If an activation is set to "repeatedly" the trigger first has to be 'deactivated' before it can fire again (e.g. if a unit activated the trigger by entering it, it will first have to leave it, before the trigger can become active again.)
 
====Seized by...====
New activation type '''Seized by...''' was added since ArmA version 1.05. It's designed to allow easy detection of domination of one side in given area. "Seized by..." should be used only with "Time out" option selected. The level of dominance needed for activation of this trigger type is depending on Min, Mid and Max time given in "Time Out" section: if the dominance is really overhelming, min. time is enough for this trigger to get activated. If the dominance is less severe, the trigger will be activated after timed out to max. value. Note that this trigger estimates side strengths in the area based on their normalized firepower per time.
 
Example of typical usage to detect if the area of a trigger is seized by BLUFOR:
 
Create a trigger configured as:
* Activation Seized by BLUFOR
* Present
* TimeOut 15-30-60
 
If Detected by BLUFOR is set, it limits the OPFOR units used for estimating balance of power in the trigger area only to those currently known to BLUFOR and the designer must ensure that entire trigger area is well known to BLUFOR before considering the area secured (or create multiple triggers that need to be active at the same time).
 
===Type===
 
What does the trigger do when activated
 
* None
* Guarded by OPFOR - Any OpFor squad with a Guard waypoint type will move to this trigger's location and await for ANY enemy contact on the ENTIRE island, then move there to engage the spotted enemy. Reference wiki for Guard waypoint type for more information on using this.
* Guarded by BLUFOR - same as above, but for BlueFor.
* Guarded by Independents - same as above, but for Independents.
* Switch - switch a group to next waypoint series. The trigger should be synchronized with a cycle waypoint. You can use this to give a squad several series of waypoints which you can switch them between.
* End #1 - terminate the mission
* End #2
* End #3
* End #4
* End #5
* End #6
* Lose
 
===Countdown===
Defines (in seconds) how long to wait until '''On Activation''' is fired after '''Condition''' was true. Min, Max and Mid allow you to add some randomization to the time.
 
===Timeout===
Defines (in seconds) random range from Min. to Max. for how long the trigger '''condition''' field expression must be active in order to make the trigger activated. From ArmA 1.05 Timout is the default option for newly created triggers.
 
===Condition===
In addition to the 'Activation' options above, this field allows you to specify other conditions that have to be fulfilled before  the Trigger activates. By default only the [[Boolean|boolean]] variable '''this''' is present in this field. It is set to the result of the main 'Activation' condition (e.g. 'east'/'present'). The expression in this field must return a [[Boolean|boolean]] value (e.g. "this && alive player"). Trigger conditions are tested every 0.5 seconds.
 
===On Activation/Deactivation===
Defines action that is performed when trigger condition changes to [[true]] or [[false]]. Expression must either be an assignment or return [[Nothing|nothing]]. Variable denoting trigger can be created by filling in [[name]] field. Array variable '''thisList''' will contain a list of all vehicles that met the trigger condition (e.g. hint format ["%1 units in area",count thisList]).<br>
 
===Effects===
[[Image:Trigger_Effects_Window.jpg|150px|right|thumb|Trigger Effects Window]]
Allows the mission designer to add music, environmental sounds, or to display title messages. Many use the effects to create quick and easy cutscenes.
 
== Scripting ==
There are two faces of Trigger and Scripting. The one is the scripting part that is used by a Trigger's properties [[Triggers#Condition|in Condition]] and [[Triggers#On_Activation.2FDeactivation|on Activation and Deactivation]]. The other is to create and modify Triggers via scripts.
 
It is possible to create, read, update and delete Triggers by scripts. This works for pretty much any of the Trigger's properties (even those containing [[Code]]), but you can ''not'' obtain the position of a Trigger that has been created within the editor. Available expressions are:
 
* [[createTrigger]] - Create a Trigger (contains most information and an example)
* [[deleteVehicle]] - Delete a Trigger
* [[list]] ''triggerobj'' - Pointer of an [[Array]] containing all units that have activated the trigger is available via ([[ArmA:_Mission_Editor#Condition|more Info]])
* [[setTriggerActivation]]
* [[setTriggerArea]]
* [[setTriggerStatements]]
* [[setTriggerText]]
* [[setTriggerTimeout]]
* [[setTriggerType]]
* ''thisList'' - like ''list'' useable in Condition and Activation / Deactivation Code ([[ArmA:_Mission_Editor#Condition|more Info]])
* ''thisTrigger'' - The trigger itself. Useable in Condition and Activation / Deactivation Code ([[ArmA:_Mission_Editor#On_Act(ivation)|more Info]])
* [[triggerActivated]]
* [[triggerActivation]]
* [[triggerArea]]
* [[triggerAttachedVehicle]]
* [[triggerAttachObject]]
* [[triggerAttachVehicle]]
* [[triggerStatements]]
* [[triggerText]]
* [[triggerTimeout]]
* [[triggerType]]
 
 
[[Category:ArmA: Mission Editing]]
[[Category:Operation Flashpoint: Editing]]
[[Category:Command_Group:_Activators|{{uc:{{PAGENAME}}}}]]

Latest revision as of 18:36, 15 July 2022

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