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!

[@asier7400]

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

[@CLMograph]

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

[@arbitool]

Thanks for sharing this.

[@PawelGrzelak]

Thanks Tim

[@dhavalparmar3694]

awesome :) love your tutorials

[@TimvanHelsdingen]

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

[@sams_3d_stuff]

Thank you!

[@massimobaita7178]

Thank You very much, Tim!

[@TimvanHelsdingen]

you are very welcome! :D

[@showcomdigital346]

Ill support you bro!

[@george.exe_stopped_working]

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

[@utubeparpankaj]

Simply awesome

[@TimvanHelsdingen]

thanks! :D

[@toonlandia9077]

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

[@waldemarcarvalho802]

Very good!!

[@TimvanHelsdingen]

thank you!

[@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

[@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.

[@resulps2189]

👍👍👍

[@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. CZcams 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.