What have I done wrong? (Programming quick start))

Development Programming & Scripting
1

I actually had this problem too, everything looked perfect yet it refused to bob up and down.

I simply restarted Unreal Engine and then tried again and it worked after that.

2

I’ve done the tutorial, though my actor does not jump. Or lift or move or whatever that is expected for it to do. I copied and pasted the sample code too and it till doesn’t work.

May it have to do because I chose mobile development at project foundation?

The code is really basically same as the tutorial code, copy paste, no build or compile errors. In preview/game the sphere is immobile. And it is marked as mobile in editor.

https://docs.unrealengine.com/latest/INT/Programming/QuickStart/4/index.html

This part doesn’t work for me and I have no clue why.

3

Do you happen to have a root component? Did you change the code?
In some cases you can’t change the position of your actor.
Also what is the result of the SetActorLocation Component? It returns a boolean. False indicates that the location is not changed.

This is the implementation of the SetActorLocation function:

bool AActor::SetActorLocation(const FVector& NewLocation, bool bSweep, FHitResult* OutSweepHitResult)
{
if (RootComponent)
{
const FVector Delta = NewLocation - GetActorLocation();
return RootComponent->MoveComponent( Delta, GetActorRotation(), bSweep, OutSweepHitResult );
}
else if (OutSweepHitResult)
{
*OutSweepHitResult = FHitResult();
}
return false;
}

bSweep is false by default

OutSweepHitResult is 0 by default

If there is no Root Component your actor won’t move. As i see in the example code there is no Default Root component. So you have to create one in order to make your actor moving.

I belive this is the issue. But without code i can’t say anything for sure.

4

Thanks for teaching me this- even though its nott related right now, restarting worked.

Thanks again though!

5

I tried making it work for an hour straight, dammit.

Worked, thanks.