er2.setCallback 19
register a global callback on a specific event Id. Only a callback can be tied to an event Id, so when this is called again on the same Id, the new callback reference will override previous one.
Callback Ids are specified at this page.
Return value
| Return Type | Description |
|---|---|
| bool | True if the callback was correctly set |
Parameters
| Parameter | Type | Description |
|---|---|---|
| 1 | string | Id of the callback (check callback Id database) |
| 2 | function | Function that gets called when the callback is triggered |
Examples
Spawn a vehicle and force all soldier to target it with a global callback
-- spawn a vehicle
local vehicle = spawnVehicle("Flak38 AA", vec3(0,2,0), vect3(0,0,0))
-- Define a callback that forces soldier to immediatly target the vehicle on spawn
function OnSoldierSpawned(newUnit)
newUnit.forceTarget(vehicle)
end
-- Register the global callback in Lua
er2.setCallback("soldier_spawned", OnSoldierSpawned)Callback that prints the name of every units that dies on the screen
-- Define any Lua callback function with the died unit parameter as described in the Callback API
function OnSoldierDie(diedUnit)
print('Unit died: ' .. diedUnit.getName())
end
-- Register the global callback. It will be called every time a unit die
er2.setCallback("soldier_died", OnSoldierDie)