Delay Function in Unreal Engine C++
So in my Lander game I was trying to find a way to delay execution of a function to restart the level after 3 seconds when the player’s ship gets destroyed, time for the player to see their ship go down in a blaze of glory whilst reflecting on what had happened and how to improve for the next run. In Unity I’d have used a Coroutine, but in Unreal, here’s what I found:
LanderGameMode.cpp listens for the ShipDestroyed event from the Ship class and calls this HandleShipDestroyed() function when triggered:
On Line 135 we use GetWorld()->GetTimerManager().SetTimer(); This function creates a timer that calls another function after a specified delay. The first parameter, LevelLoadTimer is an FTimerHandle used for this timer, declared in LanderGameMode.h:
Taking a look at the rest of the parameters in SetTimer():
We can see that this (LanderGameMode.cpp) is the class that will call a function, &ALanderGameMode::RestartCurrentLevel, after 3.0 seconds, and false (it’s not going to fire in intervals, it’ll just fire one time).
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And here we have RestartCurrentLevel() that’ll actually restart the level after the 3 second delay:
And here’s what we got:
I’ll change the automatic restart to UI Restart/Quit Buttons later, but for now delay functions in Unreal C++!
