Experimented with exporting a flip_lifetime attribute for whitewater particles. This value is a countdown timer where when the value reaches 0.0, the particle is removed from the whitewater simulation.
An interesting way to use this attribute is to scale down the particle before it despawns:
I could see this also being useful in a shader for fading out particles.
This is the example geometry node network with values set to start scaling down the particle in its last two seconds of life:
That’s really awesome. Do you think you could fake separation particles to create the foam type patterns you see in ocean water?
I think most of this type of feature would need to be mostly implemented within the simulator, but geometry nodes may be useful for generating useful data to be fed into the simulator.
It’s will be interesting to see the more features we get with geometry and soon physics nodes that can be used with flip fluids. A feature like variable viscosity to create cooling lava effects etc.
The first experimental build of the year is now available, FLIP Fluids v9.2.2!
Have a great weekend!
Yes, and yes! 2 features that I and lots of people I’m sure were eagerly waiting for, thanks @RLGUY
Been testing out the vorticity attributes to mask the ocean displacement on a low resolution sim. Even if the ocean displacement is small, we still can see that the flip surface is not wobbling like crazy by the ocean. Love it, thanks you for this implementations!
That’s awesome! I have not added a vorticity attribute for the whitewater particles yet - that’s on my todo list.
I’ve just found out that there is an Attribute Smoothing node in the works. This should be able to help smooth out attribute data that tends to flicker, such as vorticity on the surface.
@ArchiCraig great results. Can you tell more about blending flip fluids and ocean modifier process or share simple file?
@RLGUY will ocean simulations be possible near future?
Hello ,
Since it is a bit broad (don’t know where you are at in the process) , and i am out of town (no files at hand). I may only provide some ressources that had guided me ;
Helpful guidance on the github wiki :
Tips-for-Creating-Ship-Simulations
Get started quickly (modifier based) :
How to perfectly blend @FlipFluids with the Ocean modifier[…] (Francis Jasmin)
Creating an Ocean ( one or the other):
Create large scale ocean 1 […] (Dylan Neill)
Create large scale ocean 2 […] (Dylan Neill)
White Water displacement:
Displacement […] Geometry node 101 (Erin dale)
Hello~
Am trying out flip fluid to create simple waves. But when using ‘Sheeting’, the fluid just keeps on spawning and gets out of control.
Played with the strength,thickness,scale of individual objects, but no good
Resolution is at 65, other settings remain default as well.
May I please get some help on this issue?
Yay! could work to blend multiple colored fluids together then without wobbling?
My guess would be that the gap that the “pusher” create when coming down is filled by the sheeting. Also, Resolution at this scale should be higher.
In the github wiki : " Using surface tension, sheeting effects, or viscosity […] . These features are not very suitable for large scale simulations and will add a lot of extra simulation time if enabled."
Also : “The sheeting effects feature is an artificial simulation technique that fills in gaps by adding more fluid to the domain. Prolonged use of sheeting in a simulation can result in an increased volume of generated fluid.” Github domain world wiki
ArchiCraig’s reply has good info on the issue.
The sheeting effects feature may not be suitable for all types of effects due to the side effect of increasing volume. In general, I would not recommend using this feature for a wave-maker type simulation.
That’s what I’m hoping!
If you are meaning very large scale simulations to mimic large sections of an ocean, this type of effect is not very suitable for a full liquid simulation due to the amount of grid resolution needed to provide enough detail. Relevant topic: What is the simulation grid?
If you mean smaller sections of an ocean where the simulation is guided by the movement of an Ocean Modifier, we do eventually have plans to add this, but it is not yet in our near-future development plans. This is a simulation techniqueI have not yet looked very deep into and at the moment I am not sure of a suitable way implement this.
Thanks for the information!
@RLGUY, I mean ocean modifier, same way as Houdini. I’m trying extrude/match fluid mesh using geometry nodes, will see what can I achieve. If FF will not cover this things like blending/mixing simulation volume with displacement ocean, it can’t be so useful. Methods presented in documentation are ineffectiv. Question is how practically we can use FF. Ships, seas are a very common topic. FF generates mesh, but we can’t edit in on particles level and control meshing. I like Your addon very much, but can"t use it in some projects, so I need to transfer data from Houdini to blender.
I remember Realflow had(still has?) an ocean mesh that was more detailed nearer the ship making possible detailed wakes and bow wave.
@ArchiCraig Hi! Great idea with masking out displacement with flip_vorticity! Would you like to share the node setup, I dont get it working!
