[Soc-2017-dev] Weekly Report #07 - Mantaflow Particles and Fluid Guiding

[Nils Thuerey]

Hi Gottfried,

it's not a huge problem, but we basically have to spawn all articles for a single time-step around the emitter region. So for the distance "timestep * inflow-velocity" we have to create enough FLIP particles for a continuous stream of liquid without gaps.  When the object is not planar, that will be "messy", and not lead to a proper inflow. Is there some convenient way in the blender UI to input a direction? Then the inflow could consist of a volume defined by a mesh plus an inflow direction...

And you're right, it would be cool to have finer control over the inflow velocity with textures.

Cheers,
-> Nils 


=== Technical University of Munich , http://ge.in.tum.de/ ===


> On 16. Jul 2017, at 13:47, Gottfried Hofmann <gottfried at blenderdiplom.com> wrote:
> 
> Hello Nils,
> 
> On 16.07.2017 12:46, Nils Thuerey wrote:
>> And to quickly re-cap our discussion from Friday: it's an interesting
>> question how to best design and implement an inflow feature for liquids.
>> A UI widget to show and set the inflow direction is important, and we
>> discussed using planes (as currently done for smoke). The problem there
>> is that planes don't have a volume, but the volume is crucial for
>> generating the FLIP particles of a liquid sim.
> 
> I'm not familiar with the internals of FLIP fluids so I wonder why it is 
> difficult to spawn them on a plane (which can be done with regular 
> particles in Blender for example)?
> 
> I'd also like to add that I would appreciate if the inflow feature would 
> be designed in a way that it can be expanded in the future. One thing 
> you can do in Houdini that is really cool is that you can use a texture 
> or a force field to define initial velocity (or mix that influence in). 
> That can be used to for example add that extra tidbit of realism to the 
> simulation of a water faucet.
> 
> Cheers,
> Gottfried
> 
> 
> -- 
> --
> Gottfried Hofmann
> Blender Foundation Certified Trainer
> www.BlenderDiplom.com
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