Spawning Niagara Systems via C++ code

Development Asset Creation FX
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1

Hello,

I am trying to create a laser beam in UE4 and C++. I have a Line Trace set up for my FPS, and am currently using DrawDebugLine() to see the trace in action in the editor.

However, I am not able to make the exact same thing work with UNiagaraSystems. I have tried debugging, and it does seem that the values are correct, but I see no system actually spawning.

I have attached a screenshot of my code in this post. The User Params here indicates Parameter EndPoint, which is an exposed param that I created for the Niagara System in the Editor and tied it to the System’s Beam Emitter Setup.

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Here are the Debug Lines.

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You can see the Beam Emitter Setup settings in the next image.

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2

Don’t modify the user parameters on the UNiagaraSystem, but use the setters on the spawned component instead.
So TeslaArc->SetVariableVec3() for 4.27 and TeslaArc->SetVariablePosition() for 5.0.

3

Thank you! That worked for me.

4

Don’t do it, it’s a bad practice, post the actual code instead.