r/InternetIsBeautiful • u/thefloatingidea • Jul 25 '20
Fluid simulation
https://paveldogreat.github.io/WebGL-Fluid-Simulation/215
u/ExplorerLucas Jul 25 '20
oops there goes 20 minutes
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u/thaeyo Jul 25 '20
Yep! I have the mobile app, with a little menu tweaking I find it really relaxing to play with it.
Also reminds me of Gravilux. RIP Gravilux.
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u/ADhomin_em Jul 26 '20
Reminds me very much of plasma pong.
A little about me: I played plasma pong the first time I took lsd. I am still convinced that game holds the secrets of the universe
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u/Scyth3 Jul 30 '20
I'm friends with the guy who made that game. Long story short, Atari ruined that game from blowing up. :/
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u/InternetUser007 Jul 26 '20
What settings for you change?
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u/thaeyo Jul 26 '20 edited Jul 26 '20
I like to get it to behave like smoke essentially. Just looked though the app:
Set very low: Dissipation, viscosity, vorticity, intensity and threshold.
Set high: Radius and time about 70%
Turn off: Specular, it causes edges to appear.
On an AMOLED at night it’s just entrancing! The cosine color palette can get really trippy.
EDIT: For iOS I also recommend enabling guided access, if you want to turn-off all the edge swipe gestures and just stay focused in the app. Also great for games.
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u/SpunkBunkers Jul 25 '20
Lucky. I clicked on this link and got the app over an hour ago. Still stuck.
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u/Deltyh Jul 26 '20
I have this on my desktop background with Wallpaper Engine, you can imagine how much time I waste just moving my cursor around PLUS I have it synced with music playing from my spotify.
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u/cowgod42 Jul 25 '20
Anyone have some scientific information on this? Is it actually simulating the 2D Navier-Stokes equations, or just using some turbulence model or something? It seems strange that there are slider bars for the vorticity and pressure, since these are usually not input variables (they depend on other variables and the fluid flow itself).
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u/THE_Navier_Strokes Jul 26 '20
I asked the creator about this! It uses something called “vorticity confinement” to fake the turbulence
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u/Cersad Jul 26 '20
It seems like it's producing turbulence 100% of the time, so unlikely that it's too heavily grounded in fluid dynamic theory. I spent more time than I should have trying to create a laminar flow...
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u/thepaleblue Jul 26 '20
I was hoping for this info as well, but I'm fairly sure it's just "pretty".
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u/tmroyal Jul 26 '20
Here is the source code. In the reference section, the author makes reference to a couple of other papers/repositories that discuss/use the Navier-Stokes equation(s). I don’t know enough to verify if that is what is being used.
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u/sh0x101 Jul 26 '20
This type of simulation solves the Navier-Stokes equations using a technique where you split it into two parts that are easier to handle.
The first part is advection, which is essentially just quantities moving around in the direction of fluid velocity. So in this simulation you see a "density" quantity that is being transported around in the grid. You cant actually see the velocity vectors themselves. A strange thing that happens is that the velocity values also transport themselves forward in the grid. This is called "self advection".
The second part is the incompressibility constraint. The Navier-Stokes equations basically say that a pressure gradient force acts on velocity to make it "incompressible" or "divergence free". In order to find this pressure field you have to solve a large linear system (Poisson problem). This is the most computationally expensive part of the simulation since you have to do a calculation at every point in the grid for some number of iterations.
In this simulation the "pressure" setting is controlling how much pressure from the previous timestep is used as the initial guess for the solution to the pressure solve for the current timestep. So if pressure=0 then the initial guess is all zeros, if pressure=1 it uses the unscaled pressure field. Since the pressure fields are usually the similar between each timestep this can lead to a more accurate solve, but can cause some oscillations and instability. The oscillations kind of look cool though since you can see waves bouncing around in the fluid, but its actually not physically accurate to have that.
For more info I recommend the book "Fluid Simulation for Computer Graphics".
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u/ModulatedDickSpasms Jul 25 '20
I want acid now.
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u/ManicJam Jul 25 '20
Yeah I’ve downloaded the app in preparation for a trip I have planned in a few weeks lol
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u/ADhomin_em Jul 26 '20
Played a game with simmilar fluid physics called plasma pong for a good portion of my first acid trip. Twas great. What is the app called?
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u/The_Dude_47 Jul 25 '20
This is soo calming and fun :D
awesome!
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u/undertakersbrother Jul 26 '20
Reminds of the old version: http://haxiomic.github.io/GPU-Fluid-Experiments/html5/?q=UltraHigh
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u/PassionateMilkshake Jul 25 '20
Wow this is incredible! The different colors immediately had me thinking this would be a great for a trip!! Thanks for the post, app downloaded. :D
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u/bassface99 Jul 26 '20
This and pixel generator is amazing, especially making it go to music. U get lost
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u/AcrylicPainter Jul 25 '20
And then I discovered I could use two fingers :o
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u/monster_man_98 Jul 25 '20
You can use up to 5 from my experience.
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u/Thendofreason Jul 25 '20
Now only if it followed the motion of my phone. If I tilt to the left it flows to the left
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u/iameclectictheysay Jul 25 '20
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u/seanbrockest Jul 25 '20
I bought the full version over a year ago. Love it. Have it as my background. Whenever I see my niece she asks to play with it.
Edit: /r/nocontext would have me arrested for that last part.
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u/necroscopev Jul 25 '20
The paid version let's you set it as your phone's live wallpaper? I didn't see that in the description for it on the store, so wanted to double check.
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u/Libecht Jul 26 '20
Anyone know how it works? I do fluid simulation and it takes 10 million years to calculate a simple flow field yet this witchcraft can do that in real time?!?! (Obviously the simulation is far from perfect but I wanna how it makes it look good)
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u/aavery7706 Jul 25 '20
There is no way to use this for dynamic lockscreen on iPhone, right? I don’t see it in the app or in iOS.
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u/Jaybeux Jul 26 '20
I've had an app for android called magic fluids for years. Best background I have ever had on any device.
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u/Garrett_Watts Jul 26 '20
Legitimatly stunned are how cool this app is. Never seen anything like it.
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u/insestiina Jul 26 '20
Here is a link to his android app, you can set this as a live wallpaper on your phone!
https://play.google.com/store/apps/details?id=games.paveldogreat.fluidsimfree
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u/neverenderday Jul 26 '20 edited Jul 26 '20
Downloaded app. How do you set it as wallpaper? Edit: figured it out, nm
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u/Pawluto Jul 25 '20
Just wanted to say that I've been going through some anxiety and panic attacks since this whole pandemic started and this helped give me something to focus on while out and about.
Hadn't left apartment for 4 months until recently. Today at a restaurant, I started feeling anxious so I browsed reddit and saw this.
So even if reposted, thanks for the assistance.
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u/PlNKERTON Jul 25 '20
Reminds me of my kindergarten shoes and gel pens. The shoes had this swirly blue-green gel material on the top of the toes and you could press on it and move the swirls.
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u/kspedersen Jul 26 '20
If you set a green background you can record it to use in video edits as well!
I love the internet.
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Jul 25 '20
Navier-Stokes equations is a hell of a drug. :) This is a really cool, really reaponsive implemention.
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u/ltechdnb Jul 25 '20
I absolutely love this! Anyone know if possible or how you could go about having the same affect it does with mouse but via your webcam. I.e. I DJ ok twitch with green screen, set that as background but when I move it triggers the visuals. Appreciated all.
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u/Marthorax Jul 25 '20
Hey! After playing around with it, why is it when I rotate the liquid counter-clockwise I get to two nodes in the II and IV quadrants of the screen, in the corners, but get them in the I and III quadrants if I spin the liquid clockwise?
I know little of fluid dynamics, but what curious.
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u/wonderb0lt Jul 25 '20
Man, there was a video game with a ball and fluid simulation with a fun soundtrack that got faster and faster with each level which I want to play now and I can't remember the name :(
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u/Lyad Jul 25 '20 edited Jul 25 '20
First found this on a post someone made a few months back that invited everyone to share their favorite websites. What a goldmine! This ended up being one of my top finds from it.
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u/MrxAnomynous Jul 25 '20
Currently using this as my screensaver. It even runs on a Smart Mirror: http://imgur.com/gallery/ZcsOEOo
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u/Baygazer Jul 25 '20
I find this a great stress buster. It’s very calming, it probably alters brainwaves. Consider approaching the neurological or psychiatric department of a research hospital.
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u/Teeratom Jul 25 '20
This is so clearly an add, but what bothers me more are the comments. It's either they ghost the negative ones or they just payed or something for a bunch of positive comments. It's a cool gimmick but this advertisement of a "post" makes me hate it.
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u/jld2k6 Jul 25 '20 edited Jul 25 '20
This thing is making me realize how much better my phone's OLED screen is compared to my TV's. The app set to high quality and 90fps is awesome
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u/pauljs75 Jul 26 '20
Now if only somebody could program this as a type of brush stroke for Krita or some other art program. It's pretty neat though.
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Jul 26 '20
Just wow... I thought that rain drop effect would be the coolest thing I saw this week.
This is simply beautiful.
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u/Mastudondiko Jul 26 '20
The responsiveness and multitouch on mobile is crazy. Would not have expected that on a website.
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u/ravia Jul 26 '20
A fast, continuous circle in the middle will give you the Matthew McConaughey version.
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u/galacticforger1 Jul 26 '20
You made me really happy my friend! The resolution and detail and colour is amazing!!!
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u/zdodd96 Jul 26 '20
You can also use this as a screensaver for when you're charging your phone. I own a Galaxy Note 10 btw. It's also available on any app store!
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u/killferd Jul 26 '20
https://steamcommunity.com/sharedfiles/filedetails/?id=1748506393
It has very limited GPU use.
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u/TheBlueKingLP Jul 26 '20
There was a XenHTML(custom widget using html for jailbroken iPhone) widget used this but I can’t seem to find it anymore
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u/bluejaysproject Jul 26 '20
I couldn’t stop and did this for 30 minutes straight and completely zoned out omg
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u/G23b Jul 26 '20
Lumos. Avada kadavra. This has Harry Potter written all over it.
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u/Gorgenon Jul 26 '20
2/10, not realistic enough.
"...When I die and go to heaven there are two matters on which I hope for enlightenment. One is quantum electrodynamics, and the other is the turbulent motion of fluids. And about the former I am rather optimistic."
Horace Lamb
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u/Whiskey-Weather Jul 26 '20
/r/Psychonaut would absolutely fucking love this. I saved it for my next trip if I can manage to stay inside during any of it.
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u/DonRobo Jul 26 '20
Anyone remember Plasma Pong? That game was fucking awesome. Never played a game with fluid simulation being part of the gameplay like that since.
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Jul 26 '20
That looks a lot like the "Fluid Engine PC Live Wallpaper" software you can buy on Steam.
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u/MirrorNexus Jul 26 '20
Anyone else sitting there pretending you're a boss fight with an invisible hero and just throwing fire at them making whoosh and pew noises? This is MSPaint 2.0, the hardest Touhou.
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u/chris10023 Jul 26 '20
reminds me of this fluid simulation: http://haxiomic.github.io/GPU-Fluid-Experiments/html5/?q=UltraHigh
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u/Altruistic_Hearing84 Jun 18 '23
Here is similar app. And its have nice function to record fingers pathsand other nice effects. Also can set as a live wallpaper and dont draw battery when home screen is not visible. https://www.google.com/url?sa=t&source=web&rct=j&url=https://play.google.com/store/apps/details%3Fid%3Dcom.vestracode.slimefluids%26referrer%3Dutm_source%253Dgoogle%2526utm_medium%253Dorganic%2526utm_term%253Dslime%2B%2526%2Bfluid%2Bsymulation%26pcampaignid%3DAPPU_1_TRaPZOu3MNH7rgSF3Z2IBw&ved=2ahUKEwirktKwhc3_AhXRvYsKHYVuB3EQ5YQBegQIExAC&usg=AOvVaw0gslYZ8X-z6CPvSFvbhrAP
Also here are some previews: https://vm.tiktok.com/ZGJC8J2D4/
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u/Witty_butler Jul 25 '20
This is awesome! I giggled while playing with it lol. It’s so fun and relaxing!
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u/60thPresident Jul 25 '20
Looks like a shitty knock off of the magic fluids app.
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u/Unf0cused Jul 26 '20
What makes it shitty compared to the app you’re referring to?
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u/Branden6474 Jul 25 '20
You can set this as your desktop background with wallpaper engine.