Fluidity - NextGen Fluid Dynamics - [ RELEASED ]

Completely understand, and thank you for the detailed explanation. I'm sure it will help many people to have a better understanding of the CPU<->GPU pipeline.

Keep up the amazing work!

 

@MoHoe :

Here's the JetEngine demo you requested.

There's a slider in the top right which controls the engine thrust... Slider could of done with being a bit more obvious TBH...

Heat haze coming tomorrow

 

I'm not a gamer, I'm a developer Yes, I still develop on winxp desktop, though I have a win7 notebook

 

Pity this is Dx11 only. But very well done btw.

 

Nice Work Alex .. pretty awesome actually. A few questions

1: I can see some lines in there especially when thrusters are low, is that intentional? can it be removed?

2: It looks a bit grainy especially from the side, is there a way around this?

3: At full thrust the environment lights up, is this just by the light emitted from the thrusters or have you added lights in there?

4: I'm assuming it's not expensive or my GPU fan would have spun faster, your opinion? do you think it was expensive?

5: will you be adding the demo to the package? silly question really, I think the answer is yes... just checking

Heat Haze coming so soon, man you're fast

Awesome Alex

 

1. The lines aren't from the fluid, the geometry of the jet has a sort of grille thing on the go.

2. Yeah, spend more time tweaking the parameters haha, it was a quick job for me so didn't spend to long on it sorry.

3. The lights are just Unity point lights, but they are linked to the volumes using Fluidity.

4. The demo is very cheap, the simulation for the thrusters is instanced (each thruster shares the same simulation). The whole thing costs around 4ms. The simulation is very high quality,1M particles (which I've set on highest settings) with 2nd order correction and vorticity confinement enabled, as well as 10 pressure iterations.

5. Yeah, don't see why not.

 

Updated the jet demo to show off the new heat haze effect. Available on a per volume basis, obviously comes with tweakable controls as well ( spread, taps, strength ).

Here's the link again
JetEngine

 

Getting ready to push this update to the store.

 

So here's the feature list for the next update I'm pushing:

• Unbounded fluid, with edge fading.
• Heat haze with a variety of controls.
• Reverse the gradient so it's more intuitive.

Anything I've forgot before I sub this thing?

 

You've just listed all the stuff i'd find absolutely perfect right now, get that thing up there! It's super needed very shortly as the weekend is my initial deadline and it would be a shame not to have this in there. However if it does what I hope I could have something amusing to show it off with shortly after getting my greasy mitts on it. I hope.

 

I'm hoping to be able to simulate some kind of turbulence too although I dont thing that will be hard to mimic, there'll just be a few things raining from the sky, on fire, with I guess all of them being instances of one or two simulations, does that sound about okay?

 

Hello.I bought this great asset.Thank you to made this asset.
Then, i have a question, is There are any plan to add feature to change blend mode?
if there is a way to change blend mode already, if you teach me , i feel glad.
Thanks.

 

Hi there, thanks for using Fluidity. I think I've experimented with that in the past and left some of the code in there. Which blend modes wild you like?

 

Thank you for your kindness ! I want Additive blend　only.Is there any chance？

 

Yeah certainly, is this for the full screen quad which renders the fluid? Or the fluid itself?

 

How do you see the turbulent fields working? As another effect type? With direction?

 

As far as I can see right now the Heat Haze is only some change in color of the fluid? Would it possible to have some additional effect of diffraction the light so you get an air flickering effect? (Just found this for better explanation: http://www.bartkuipers.com/bart/2010/tutorial-22-hlsl-heat-haze/ )

 

Yeah Thanks! I hope fluid itself.I feel happy!

 

What else is heat haze but a change in colour?

Maybe my demo doesn't show the technique off to well, I will tweak some parameters and update it

 

In the link I provided above you see the effect I mean. The image parts that are behind the heated air are getting distorted.
Here an old Unity thread with the same effect: http://forum.unity3d.com/threads/50132-Heat-Distortion

 

I know what you mean, and I know how to make a heat distortion effect. I was just making a graphics programmer joke, how any effect can be quantified to a simple change in colour

Yeah, so heat distortion is a really simple effect to produce and I assure you my fluid system is doing the exact same thing (infact I'm taking it a step further and by adding light diffusion also). As I said, I'll tweak the numbers in the demo in order to exaggerate the effect.

 

Ok, let's get married

 

Haha

 

This looks really pretty, but I don't see any screens or demos with what I'd call fluid... looks more like a smoke and fire plugin... Am I missing something?

I'm interested in fluid dynamics atm for a game I'm developing. Could this plugin support something like fluid being fired out of a hose pipe? And then splashing onto the floor?

 

Smoke and fire are both fluid. You mean you want liquid? I am working on uploading a liquid demo using this system. It requires a slightly different method of rendering so it involves a little work. But yeah, this system could handle the scenario you've proposed in your post.

 

Man, it looks totally awesome.

 

Thanks alot! It's about to get a whole lot awsomererer

I just completed the upgrades to the renderer last night to handle different blend modes. This will be making it into the next asset store update.

 

Can we see some more examples of its functionality? For instance...

Could this be configured to work as a go-to tool for explosions?
What do the controls in the inspector look like?
Can the quality be easily scaled back enough to allow many sources? Does it still run well when used like that?
Do I need to make custom scripts to create unique variety beyond a flame appearance? (ie, how accessible is this for non-scripters?)
Can gravity be applied to the particles?
Can the particles collide with meshes? Is that expensive?

I'm kind of just looking for more info and functional examples. It appears that this can do what I need but for $100 I'd want it to be flexible enough to use on a larger scale in the project and for the inspector tools to basically fill all of my flexibility needs.

 

I don't see why not, you can get a pretty cool nuke effect.

I plan on posting a nice video demonstrating this.

I think I have a demo already posted at the start of this thread showing 150+ fluid systems. I have many optimisations in place to handle lots of systems in a single scene, namely culling and rendering LOD.

You have full control over appearance from the editor. Currently only gas fluids are supported, so things like fire and smoke are what it's best at (although liquid coming soon).

Hmm, it's not particles in the same sense as shuriken for example. It's a truly volumetric effect rendered without geometry.

Not in this version, I have a working prototype of this type of thing (as well as mesh emitters) but it's not an optimal method. Hopefully Unity will release the ability to render into 3d render targets, if not I will submit my workaround method.

I've posted 4 demos at the start of this thread. What else would you like to see in a demo? More interactive demos maybe?

 

Great info, thanks.

Yeah, I noticed that naturally happening when the sliders ramped and its a cool effect but I'm curious about other shapes. For instance shuriken allows different shape emitters (specifically, spherical) and i think all I'm seeing is unidirectional emission from the demos here. Maybe some variety in the logo demo, but I can't really tell.

Awesome, I think that'll clear up a lot of questions and help show what you can do with it.

Ahh I see, I didn't realize I could move around with that demo. It looked like just a dozen or so.

Which is awesome, but is this something that users should take into consideration? This kind of gets more into your liquids, I think, but I'm just trying to look ahead and get a better idea of what we can/can't do with it... For example if I making a flame thrower and fire it sideways would the smoke effect at the end of it drift up/down? Maybe I should just buy it and try to break it

Variety, mainly. I know this is more than a 'fire simulator' but for me the demos just look like fire clones. For example the jet demo at max power just looks like sideways flame i could burn in my backyard, and I would expect a Jet engine to appear different.

http://www.youtube.com/watch?v=GcFWP_TvNjM

Its clear that the technical power is there, its just that the examples are so peaceful and serene, showing a flame type of effect... Lets see some mayhem, chaos and destruction! Also I would be looking to basically replace the bulk of my shuriken systems with this so I keep thinking of comparisons to shurkien, like emitter shapes, shape over time, color over time, things like that.

 

Went ahead and purchased it, but I don't get any fluid simulation. I enabled DX11 and tried it in a blank project but its not rendering any fluid. The webdemo's work fine. Using Radeon HD 6450 on this machine.

I'll try it on another computer in about an hour.

 

That's a bummer! Congrats though, you're the first. Could you get in touch with me via email (in the docs). I have the new updated project you can try out, I have done some major refactoring of the rendering code.

 

Totally! I sent you an email. You can also get me on skype @ zer0bounds if you use it.

 

I just want to get the following information out there ASAP!

This requires Unity Pro DX11.

 

You'll be pleased to know that recent changes to fluidity have prompted me to refactor much of the rendering code. This has much improved memory consumption, draw calls, and performance!! It seems about a 0.5ms win with a single fluid system being rendered in the scene. That number scales with number of active fluid systems being rendered.

 

That is very nice to hear
keep it up i will get this asset soon.

 

I've just submitted the update to the asset store.

New features include:
- Blend modes (alpha blending, additive blending and selective).
- Scatter based heat haze.
- Edge fading for volumes.
- Unbounded fluid, turns off collisions with fluid volume.
- Also added in support for viscosity and gravity. (this is the first steps toward a water simulation)
- A major rewrite of the rendering system.

I've also just updated the jet engine demo, showing off the new heat haze effect. Here's a link:
::Jet Engine Heat Haze Demo

Now that that's out of the way, I'm planning on making a new video showing off some of the effects possible, as well as a tutorial video. Stay tuned.

 

You make a lot of people very happy with this cool stuff!!!
Looks amazing! Can't wait to have the next version in my hands.

Is there some sort of 2D option for the fluid? So we could restrict the simulation into only 2 dimensions?

 

Umm, I think you could just make a 3d volume but shrink the resolution on one of the axis to 1... Other than that, no, this system wont support 2D fluids.

On the subject though, with the upcoming release of Unity2D I have developed a plugin for Fluidity, which lets you "bake out" fluid systems to 2D sprite sheets. The benefit of this is you no longer require DX11 to playback these fluid systems. Maybe this is something I should include in the next update?

 

I've started work on the next update.

New features will include:

• Translating fixed grids. Using this you can move your fluid volumes around the world, and the parallax will match up.
• Receiver fluid effector.
• CPU -> GPU feedback, allows for things like collision callbacks, temperature readings.
• Simulation optimizations.

Here's a screen grab of the latest update in action, I've added a flamethrower to the Angry Bots demo.

​

Here's the angry bots demo, with flame thrower:
::Flaming Bots


I will be making a tutorial video showing you how to modify the AngryBots demo to add the flamethrower with no scripting what so ever.

 

Man, I can play the whole day with this fluid! Just missing the smell of real gasoline when I put everything on fire.
But now I'm real curious how to quench this with some liquid

 

Yeah it's pretty cool, I'm pleased with the results. Imagine what can be done with this by someone with real art skills Can't wait to see what people manage to come up with.

Liquid is coming, with the update I just submitted to the store, you can create liquid simulations by tweaking a few parameters (viscosity and gravity) and with a coming update, you will be able to render liquids with reflection, refraction, density fogging, diffusion, foam... and much more

 

Pure AWESOMENESS! Now come-on payday!

 

I should also mention that Oculus VR support will be coming with the next update as well.

 

Is the smoke illuminated by the environment?

 

No.

 

Any plans on adding that?

 

Yeah I've got a rough idea of how to do that efficiently, will be in a future update.

 

Looks like that's the next update ready. Man that was quick

Just waiting on confirmation from my guys doing the Oculus testing and then ready to submit to store.

 

Mr.smb02dunnal ,Thanks for update ! I'm looking forward to it on store !