23 replies to this topic

[tasiek]

great job.

one question. why this dop is not beinch cached when i playback ? in Flip Object, Allow Caching is checked on.

thx for sharing

[whyeah]

that's very very usefull,but i got question when i write my surface field，it only wrap around the emitter,humm..

[gramx]

Great work! Thanks for sharing the hip! really helpfull

I have loaded the file into houdini 12.5 apprentice, but when I sim I dont get any new particles added to the Flip ;( Is this a problem with 12.5 or Apprentice?

 resize.jpg   78.11K   61 downloads

Thanks for your help

Graham

[Skybar]

gramx, on 03 April 2013 - 03:11 AM, said:

Great work! Thanks for sharing the hip! really helpfull

I have loaded the file into houdini 12.5 apprentice, but when I sim I dont get any new particles added to the Flip ;( Is this a problem with 12.5 or Apprentice?

resize.jpg

Thanks for your help

Graham

I don't know whats wrong, but if you delete the nodes that makes it an emitter - and then make it an emitter again, it works.

[gramx]

Thanks for the reply. Can you specify which node I need to rebuild I have tried a few without luck! must still be missing one, is it just the yellow nodes in the flipsolver?
Thanks for your help!

[Skybar]

Here you go, should work. I put down two green notes in the AutoDopNetwork and Bounding_Box_and_Emitter so you can see what I replaced.

Attached Files

•  Resize.hip   2.19MB   115 downloads

[gramx]

Hi

Thanks for the file, it works

I just need to figure out how it all works now!

Thanks again, big help!

[gramx]

Hi

I have been able to reproduce the Flip resize in my scene but have hit another problem. If you add the new whitewater solver to add spray/foam/bubbles it only works within the original grid. I guess that we need to setup another resize on the whitewater solver.

Has anyone got this working?

Thanks

[galagast]

Hi, I also tried my luck with an auto-resize setup. Here's what I got so far.
 auto_resize_jefflim.gif   252.89K   46 downloads
(click to see animated gif)

I went with sourcing particle volumes only on areas that the fluidTank box haven't filled yet.
The setup doesn't require manipulating the underlying flipSolver.
Although I'm not particularly sure if the flip simulation is actually advecting the particles properly.
Something is just a bit odd about the fluid movement, I just can't quite put my finger on it. >__<
Any insight would be appreciated

Attached Files

•  auto_resize_jefflim.rar   119.72K   30 downloads

Edited by galagast, 29 May 2013 - 11:46 PM.

[ryew]

galagast, on 29 May 2013 - 11:45 PM, said:

Something is just a bit odd about the fluid movement, I just can't quite put my finger on it. >__<
Any insight would be appreciated

The fluid doesn't rush back in to fill the space behind your moving object, so it seems very thick/viscous and slow-moving like thick mud.  I haven't checked your file but perhaps look into your viscosity settings?

[galagast]

hmm.. I took a second look at the settings (I actually have the viscosity disable) and found out that that was probably due to my scene scale.. the boat is like 30 meters long, and the realizable box is around 100.. I could try doing another test with smaller (speed-boat) sized objects..

I also did a small comparison test just to see if the fluid behaves differently if I'm using auto-resize and not.
 tank_comparison.gif   1.48MB   19 downloads  tank_comparison.gif   1.48MB   19 downloads
So far, the simulation seems similar enough to warrant an acceptable comparison.

[gramx]

I kept getting problems with adding whitewater to the resizing fluid, so I tried another simpler method.

I animated two boxes moving along with the domain. The front box adds fluids and the rear box removes fluid(sink). It works well for fast moving domains. I have attached a file so you can see setup:-
dl.dropboxusercontent.com/u/73974952/TrackingFlipFluid.hipnc

Example on vimeo:-
https://vimeo.com/64140693

Graham