This scripting tutorial by Wolfsong explains how to show units triggered by player in a zone using example XML code.
Items needed from map editor:
- 1x area (I called it area_intel)
- 1x human (I called the group intel_group01)
Define A Trigger Zone For Player (place in beginning of script_data, after include)
<area_group name="area_intel" area_name="area_intel" group_id="friendly1" interval="0.3" condition="1"/>
| name |
What you call it (use same as area_name) |
| area_name |
Name given to area in editor |
| group_id |
Who can trigger it? ("friendly1" == mitchell/server,
"mp_players" == all players MP,
"players" == all ghosts SP/MP,
or any group_id set for a human/humans in the map editor) |
| interval |
Seconds between checks |
| condition |
How many from group_id is needed? |
NOTE: If you want a vehicle to trigger an area just replace group_id with vehicle_id and enter the name of the vehicle as defined in the map editor. You also have to remove the condition variable. Like in this example:
<area_group name="area_intel" area_name="area_intel" vehicle_id="my_tank" interval="0.3"/>
Activate Trigger Zone
(place in an event, example in if active from beginning <event name="start_game">)
<element type="UnitInArea" area="area_intel" state="activate" start_time="1.0"/>
| type |
what action to take, UnitInArea check selected |
| area |
ok, which UnitInArea check?, area_group defined earlier |
| state |
what to do with it?, activate/deactivate |
| start_time |
when?, seconds delay after event executed |
Create Trigger For Player In Zone
<user name="area_intel" type="once">
<trigger type="UnitInArea" area="area_intel"/>
Define trigger/condition to run
| type |
what will trigger it? ("UnitInArea == zone trigger) |
| area |
which defined area_group? |
<event name="show_area_intel"/>
What will happen?
| name |
event to run if trigger ok |
</user>
Create Event To Run When Zone Is Triggered
<event name="show_area_intel">
| name |
name to call to run event |
<element type="DebugString" msg="show_area_intel" start_time="0.0"/>
Feedback in debug mode
| type |
gives message in debug mode |
| msg |
message shown |
| start_time |
delay in seconds |
<element type="UnitInArea" area="area_intel" state="deactivate"/>
Prevents zone being activated again by deactivating it
| type |
what action to take, UnitInArea check selected |
| area |
which UnitInArea check?, area_group defined earlier |
| state |
activate/deactivate |
<element type="ActivateGroup" group_id="intel_group01" start_time="0"/>
Activate group of humans, make them visible and start their given actions
| type |
what action to take, "ActivateGroup" |
| group_id |
ok then, which group? |
| start_time |
when?, seconds delay after event executed |
(add as many elements as you want, all executes when "show_area_intel" in run)
</event>
And the clean XML code with only overview comments:
<!-- Define A Trigger Zone For Player (place in beginning of script_data, after include)-->
<area_group name="area_intel" area_name="area_intel" group_id="friendly1" interval="0.3" condition="1"/>
<!-- Activate Trigger Zone (place in an event, example in if active from beginning <event name="start_game">)-->
<element type="UnitInArea" area="area_intel" state="activate" start_time="1.0"/>
<!-- Create Trigger For Player In Zone -->
<user name="area_intel" type="once">
<trigger type="UnitInArea" area="area_intel"/>
<event name="show_area_intel"/>
</user>
<!-- Create Event To Run When Zone Is Triggered -->
<event name="show_area_intel">
<element type="DebugString" msg="show_area_intel" start_time="0.0"/>
<element type="UnitInArea" area="area_intel" state="deactivate"/>
<element type="ActivateGroup" group_id="intel_group01" start_time="0"/>
</event>
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