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Houdini12 Flip Customize Resize


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#1 Neil

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Posted 12 April 2012 - 03:20 AM

My first shot.
i'v seen a few of Flip or naiad test videos about ship sail on the water.
In many tests, they build a large scale fluid tank so the ship can goes farther but with lots memory cost and time waste.

My goal is optimize this,
i created a customize bounding box to limit the Flip and parent the bbox position with the ship.
so i had a constant memory cost wherever my ship sail.

lucky it works!! my ship sail on the ocean without the default volume limits..

Posted Image


Hip i uploaded at #4



In the next step, i'll try to use the velocity field to auto-resize the flip , so that even the ship sail with different speed and turn around, my boundingbox will still match perfect.

i think i also need a minimum and maximum set when ship doesn't move or move too fast.

Bad english.. :P

Edited by Neil, 02 May 2012 - 03:49 AM.


#2 Neil

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Posted 12 April 2012 - 03:26 AM

image
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#3 JuriBryan

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Posted 21 April 2012 - 08:17 PM

hey man that looks awesome!
could you maybe explain a little bit more in detail how u did it.... or maybe post a basic hip that shows the basic set up....
really cool idea!



Oh and I have one more question.... does someone know how to extract only the top side of the particles... What I mean is only the part of the fluid sim that is deformed.... so that it is just a deforming grid basically...
cheers
www.juribryanfx.com

#4 Neil

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Posted 02 May 2012 - 03:46 AM

here is clean HIP to show how to do this.

And here is the video link to my recent Test.
Posted Image

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  • Attached File  Resize.hip   2.22MB   2051 downloads
  • Attached File  dd.jpg   79.49KB   94 downloads


#5 zoki

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Posted 03 May 2012 - 05:03 AM

thanks neil for sharing this :)
i tried to set it up but had some glitches
looking forward to see your setup
vfx reel :

View on Vimeo.


http://www.imdb.com/name/nm2902303/

#6 nran

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Posted 03 May 2012 - 07:57 AM

very very nice one~~~~good job man

#7 lijunhong

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Posted 03 October 2012 - 02:47 AM

允许输入拉丁字符的拼

#8 lijunhong

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Posted 03 October 2012 - 02:49 AM

Break down your video "Add extra velocity field to make more turbulence around ship" How do??? Thanks!

#9 poco

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Posted 13 October 2012 - 12:11 AM

cool man! I have seen the video,the mind is good which can improve a lot speed.....

#10 Jordan Walsh

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Posted 14 October 2012 - 09:58 PM

Great stuff!!! Thanks for the example file! :D
How did you get the HOT ocean to blend into the sim and extend out to the horizon?
Ive got one blending with the flip surface ok, but struggling with extending it further.

#11 Nerox

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Posted 16 October 2012 - 11:54 AM

Hi Neil,

Based on your breakdown video, I wonder, does the flip container actually move in worldspace? Or did you apply forces to the water to make it look like it does?
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#12 Nerox

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Posted 17 October 2012 - 01:42 AM

I've had a closer look at the hipfile, I find it very clever indeed. I'm currently simulating it with 20.000.000 particles and there are artifacts showing around the edges of the container where fluid is sourced. Some work has to be done to turn this into an easy to apply HDA, but it definitely shows the potential of this approach. Things become considerable more complicated when your boat has to turn, or how when you want the container to scale automatically according to the ripple that you create.

For those who used the first iteration of the FLIP solver, doing something like this used to be unthinkable. Having a container, was a problem on it self, but this ... Things like this show the terrific progress that SESI made with this iteration.

Tnx Neil! :-)
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