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How to script particle systems?

Is it possible to somehow script or change a particle system? For instance, I would like to change the scale of the spawned particles, depending on the current speed of an actor. This could be used to create a cheaper smoke trail for a missile, by stretching the smoke particles in the direction of the rocket's movement.

Alternatively, I could of course just always stretch them, independent from the speed, but in that case I would have to change the particles initial speed based on the rocket's current speed.



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asked Apr 04 '14 at 12:35 PM in Using UE4

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You can use the Size By Speed module with GPU particles to achieve this.

Alternately, you can create a particleParameter for the sizeScale module, and modify the scale using a variable inside of a BluePrint to change the scale of your particles along an axis based on BluePrint logic.

For any of these solutions you will want to use velocity, rectangle alignment, or a mesh emitter.

Info on particleParameters


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answered Apr 07 '14 at 03:44 PM

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