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How can I make an emissive animation along these pipes?

(animating an emissive flow along a mesh)

How can I do this? It is to show where the fuel in the pipes flow. I think the biggest problem is turning the animation 90 degrees. Here are the pipes I want to do it with. I want the "emissive animation" to be a bit on the outside of the pipes. alt text

Product Version: UE 4.19
pipes-01.png (3.9 MB)
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asked Jul 20 '18 at 09:16 AM in Blueprint Scripting

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avatar image AZTECCO Jul 20 '18 at 10:37 AM

Hello! I would use particles..

avatar image Xmoono Jul 20 '18 at 10:54 AM

Hmm, I have just touched a little bit of the particle system in unreal. Do you have any suggestions on how to do that? Thank you for your input by the way!

avatar image AZTECCO Jul 20 '18 at 02:39 PM

You have to set up a vector field and set the particles to be affected totally by it(can't remember the parameter name)

you can create many types for straight pipes, bended parts, narrowing and so on..

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in the pipe material, add a texture with a panner to make it scroll, and connect it to the emissive output of the material.


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answered Jul 20 '18 at 03:13 PM

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avatar image AZTECCO Jul 20 '18 at 03:31 PM

Good tip but.. This is not a plain surface.. Will this works for pipes? Curves?

avatar image Xmoono Jul 20 '18 at 03:33 PM

I don't think that will work with the Unwrap I have. I just scrolls the textures am I right?

avatar image ScottSpadea Jul 20 '18 at 04:06 PM

you will need to unwrap the pipes in a consistent way for this effect to work. all the curves should be straightened out to follow a trim texture. this unwrap can be done on a second UV set, if you want to avoid stretching the diffuse material.

avatar image Xmoono Jul 20 '18 at 04:44 PM

Yeah, that would work, problem is, there are alot of pipes. I'm thinking of making a little set I can use. Like a curve, a staight one, and such. But the best way would be to use a spline of some sort, and connect a cylinder, to maybe put the emissive material on that, but I'm not quite sure how to do the spline thing.

avatar image ScottSpadea Jul 20 '18 at 07:23 PM

just model a corner piece, with a stretchable straight section attached to it, and unwrap it. then build everything out of that piece, replacing your current pipes. when you finish modelling the pipe network, you can weld it all together, and arrange the UVs to reduce seams.

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