Creating a Better Curveforce in Houdini

If you've ever used the Popcurveforce you know how much of a headache it can be. In this video we explore the concepts to build our own in order to have it be a bit more reliable.
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0:00 - intro
2:39 - Showing the issues with regular curveforce
7:00 - Explaining the concepts
9:05 - xyzdist & primuv
14:50 - Setting up our curve and emitter
16:45 - diving into DOPs
19:38 - Writing our wrangle
22:14 - Suction force concepts
24:45 - implementing the forces
29:00 - adding additional functionality
36:00 - creating a velocity field for advection
43:36 - Caching to disk
46:00 - additional attributes for rendering
51:46 - Rendering our FX in mantra
56:33 - Outro
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Support me on Patreon: www.patreon.com/timvanhelsdingen
discord: / discord
Check out more of my tutorials: www.timvanhelsdingen.com
Instagram: timvanhelsdingen

[@Kemer95]

Thanks Tim!
I used this technique, modified it a bit, and created particles going throught curve and morfing in a shape of a mesh, when they hit the end of a curve ^^
Super thankful!

[@weililin6548]

Thanks Tim. You really give me a lot of thoughts in my career right now. Can't thank you even more. :)

[@akshayanandk5534]

Can't thank you enough for these man :)

[@janhebein5413]

Great Video Tim! With this technique i can do so many more things. Thanks

[@TimvanHelsdingen]

thanks! Yeah these functions are extremely useful for a lot of different things.

[@safron19940704]

Thank you for your work) It's perfect!

[@dhavalparmar3694]

awesome :) love your tutorials

[@TimvanHelsdingen]

Thanks! Hope you'll love this new one as well :D

[@asier7400]

Thanks for you tutorials. The best is the Gumoard option for complete this tutorial! :)

[@arbitool]

Thanks for sharing this.

[@CLMograph]

Amazing tutorial. Thank u so much for this content, Tim! Helps a lot!

[@PawelGrzelak]

Thanks Tim

[@massimobaita7178]

Thank You very much, Tim!

[@TimvanHelsdingen]

you are very welcome! :D

[@showcomdigital346]

Ill support you bro!

[@sams_3d_stuff]

Thank you!

[@utubeparpankaj]

Simply awesome

[@TimvanHelsdingen]

thanks! :D

[@waldemarcarvalho802]

Very good!!

[@TimvanHelsdingen]

thank you!

[@toonlandia9077]

Cool tutorial!!! One question, how to taper particles in the end of courve?

[@george.exe_stopped_working]

how can I control the orbit of the particles in this configuration? amazing tutorial btw.

[@ioanamovileanu29]

would this work with a helix ? I am trying to make it work for a helix but no matter what I do the particles behave in a weird way and Im not sure what Im doing wrong

[@resulps2189]

👍👍👍

[@bananaboy1100]

How can I do this in Blender? unsure If I want to go the particle route or smoke route... smoke can't follow a curve in blender so I kinda have to use particles ... so difficult

[@TimvanHelsdingen]

it’s all just math, which is universal. so you could just replicate this using geometrynodes probably.

[@bananaboy1100]

@@TimvanHelsdingen I feel like I can get the movement right, and I put a ton of particles in. Maybe my issue is with the shading? Like yours actually looks like magic fx whereas mine just looks like a bunch of particles. Not sure If I'm missing something in the shading / compositing / color side of things.

[@TimvanHelsdingen]

@@bananaboy1100 Try a additive shading, that’s where if particles stack their color gets added so you get denser and more emissive patches.

[@bananaboy1100]

@@TimvanHelsdingen That makes sense. I'm not sure which part of the process I have an option to do that (in blender, in After effects,etc...) or If I am even able to, but I will look into it. Thanks!

[@TimvanHelsdingen]

@@bananaboy1100 You need to do that in the shader, although you could fake it in after effects I guess, but it won’t look as nice.

[@Moctop]

My particles are nowhere near as tightly following the curve as yours...cranking up the suction to 500, and it gets close..

[@nictanghe98]

low values -> overshoots.
high values -? overshoots and spazzes.

[@alexs6081]

Which version of Houdini is this?

[@TimvanHelsdingen]

18.5

[@Somethinginvisible1]

I think "N" direction was wrong. the opposite direction right? sorry for weird english

[@TimvanHelsdingen]

That depends entirely on how you draw your curve. If you want to change direction just invert it.

[@Somethinginvisible1]

@@TimvanHelsdingen oh i get it thanks for good tut Van!!!

[@soyringo180]

thanks!!!!!! i love you!

[@ArtVandelayInc]

1 hour is way too long

[@TimvanHelsdingen]

How so? It's a lot of info and explaining stuff in a manner that's understandable for everyone, with examples, just takes more time than simply showing a line of vex code.
If all you're after is copy and paste vex code then you're on the wrong channel.

[@ArtVandelayInc]

@@TimvanHelsdingen You guys are incredible. It's not all your fault though. TH-cam goes for it. Longer the better. Gotta crank those watched times. What you did here can be shown in 15 minutes. These slow paced long videos just waste a lot of time. Editing is obsolete now.

[@TimvanHelsdingen]

@@ArtVandelayInc Well yeah, it can be shown in 15min if you just only show the code, but most of my audience likes my videos because I always explain stuff in detail so it's understandable for everyone, which makes the videos a lot longer because I put all the examples for clarification in-between. Might not be the best channel for you, I can understand how it might not be for everyone.