Hi everyone

I am doing some rnd for one of our future projects, which includes “flying paint ribbons”,

At the moment I am creating the ribbons by emitting normal particles out of some animated geos that have been animated on a specific path in Maya, applying forces…, and meshing them using particle fluid surface, which gives me decent results for all the shots that the fluids are not interacting with each other,

But there is one shot which one paint ribbon wraps around the other ribbon and completely covers it…

I tried many different ways in Houdini mainly using the first ribbon`s mesh as an attractor for the second ribbon`s particles, but didn't get any results, getting the particles completely cover the first ribbon,

At the moment I have switched to realflow for this particular shot, but I was wondering if there is any way in Houdini to make the particles get attracted to a geo and perfectly cover it? I know there should definitely be a way but since I am relatively new to Houdini couldn't think of any thing other than attractors which didn't really help at all,

I have attached a frame of the storyboard for that shot,

I would really appreciate any help,

Thanks in advance

Sina

You can create a custom volume force that drives a FLIP sim; First an attraction force to the goal object then to ensure you particles will cover entirely the goal object you can create another custom force based on the surface tangents with a bit of curl noise.

Hope that helps.

Thanks Alejandro

In my tests I once tried attracting the particles to a volume, based on the normals on the first geo,
Maybe as you said I should try a second force based on the surface tangent to make the particles
slide on the geo and cover it,

I will come back to you if I had any questions about that,

Thanks agian

Sina