Issue - Putting the Particle Emitter P_Explosion in Launch Blast Component Does not work

Unreal Courses Talk
,
#1

I Have followed Ben’s instructions when putting the particle emitter (P_Explosion) in the “Launch Blast’s Particle Template”

To make sure that i have migrated successfully i tried to put the particle into world by dragging in into the level. and every time i would start the level the particle plays out well.

But when i put it in the Launch Blast component nothing happens.

I even opened the particle and it plays well inside the particle editor.

I also have “Real-Time Rendering” ticked on in the Viewport.

Does it have an issue because im using 4.16? There an error saying that “AttachTo” function is outdated.:

CompilerResultsLog:Error: Error C:\Udemy\04_BattleTank\BattleTank\Source\BattleTank\Private\Projectile.cpp(24) : warning C4996: ‘USceneComponent::AttachTo’: This function is deprecated, please use AttachToComponent instead. Please update your code to the new API before upgrading to the next release, otherwise your project will no longer compile.
CompilerResultsLog:Error: Error C:\Program Files\Epic Games\UE_4.16\Engine\Source\Runtime\Engine\Classes\Components/SceneComponent.h(615) : note: see declaration of ‘USceneComponent::AttachTo’

Here is a screenie of my Projectile BP. My Collision Mesh Component works because i can add mesh to it and texture and it is reflected to the game.

953×995 89.4 KB

Here is my Projectile cpp and header file. I think i followed Ben’s instruction well But i included it here maybe i did something wrong.

1508×662 98.8 KB

Here is P_Explosion Particle which works well

954×1040 149 KB

And my output log after compiling just in case

#2

@martopad Did you find the solution to this? I’m having the same issue with engine version 4.14.3 right now.

#3

@CommittedGamer nope man after a few days of no reply i just watched the rest of the battletanks chapter without trying it out.

#4

@martopad Alright thanks for replying. I tried a few different approaches too in 4.14.3 and didn’t get the particle effects to work.

#5

Good Luck! If you happen to solve it feel free to post the solution here! :slight_smile:

#6

I did get this to work eventually, the fix required:

  1. Updating the code to use AttachToComponent (which I’d done before posting here)
  2. Lots of editor restarts to break caching (I’d done a couple before posting here)

Unreal was very aggressively caching my code and even after the above steps the particle system wasn’t working for hours. I continued with the course yesterday and then the particles magically started to work!

#7

Great! Thanks for posting the solution!

Maybe ill try it sometime.

#8

Worked for me too.

LaunchBlast->AttachToComponent(RootComponent, FAttachmentTransformRules::KeepRelativeTransform);

I started with Ben’s “LaunchBlast->AttachTo(RootComponent);” but no particles :frowning:

Changed to …AttachToComponent(… and re-compiled - still :frowning:

Commented out creating and attaching the particle system (LaunchBlast).
Recompliled…
Uncommented creating and attaching the particle system
Recompiled and voila particles :slight_smile:

image
image.jpg991×405 84 KB

3 Likes
#9

Commented out creating and attaching the particle system (LaunchBlast).
Recompliled…
Uncommented creating and attaching the particle system
Recompiled and voila particles :slight_smile:

Just to add some weight to this. This workaround also resolved the issue for me.

#10

Literally added this code and the problem was solved.

LaunchBlast = CreateDefaultSubobject<UParticleSystemComponent>(FName("Launch Blast"));
LaunchBlast->AttachToComponent(RootComponent, FAttachmentTransformRules::KeepRelativeTransform);
LaunchBlast->bAutoActivate = true;

Hope it helps.

#11

Adding more weight to this

Also worked for me
Thank you!

#12

In case anyone else, like me, tried all the above and it still didn’t work you can try this…

If you’re getting a warning in your output log regarding the projectile that says something like

“Projectile_0 has natively added scene component(s), but none of them were set as the actor’s RootComponent - picking one arbitrarily”

You can add the following line in the Projectile.cpp right after you define the CollisionMesh:
SetRootComponent(CollisionMesh);

This seemed to solve the error and get the particle emitter to display for me.

#13

This ended up solving it for me but only when paired with some solid rebuilding efforts. I had rebooted, recompiled, cleaned the project etc., and nothing but a full rebuild from VS alone / editor restart after would get this going for me. Thanks for the help.

#14

This helped me out but i was in need to comment everything related to LaunchBlast in cpp and h files then reload blueprint compile uncomment and compile than it worked.
Thanks :smiley:

#15

Hey - the problem is attachtocomponent is not working correctly. As for others caching seems to do the job - in my case it helped to attach it in BP instead of C++. Like this:

attachto
attachto.jpg1400×694 166 KB

#16

this worked for me as well, plus restarting the editor, thank you!

#17

It’s not help in 4.27

Privacy & Terms