Goal Fluid To Geometry Or Image?

[tnt]

Is there a way to goal a fluid to an object? I want a fluid to move to the surface of an object.

Thanks,

[david-schoneveld]

well I can tell you there is no goal attr and fields with negative mag (if you try to pull it towards the object) don't really work well on fluids b/c they are non compressable so it can't really push in on its self. Nothing comes to mind of a way to do that with fluids off hand.

[duncanbrinsmead]

Depending on the effect you are after, it might work to emit fluid from the object, then play the simulation backwards. You can reverse a cached fluid by breaking the timenode connection to fluid.currentTime and reverse keying the currentTime value.

Duncan

[tnt]

Yeah I already tried that but the fluid dynamics don't look right when going in reverse. I would like the eddies and turbulence to continue in a continual motion. The reverse technique makes it look like a ping-pong effect.

What I'd like to do is emit a fluid from a texture then form it into text

QUOTE(DuncanBrinsmead @ 09/16/05, 08:47 AM)
Depending on the effect you are after, it might work to emit fluid from the object, then play the simulation backwards. You can reverse a cached fluid by breaking the timenode connection to fluid.currentTime and reverse keying the currentTime value.

  Duncan
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[duncanbrinsmead]

Here are some other similar threads:

http://www.highend3d.com/boards/index.php?showtopic=176493
http://www.highend3d.com/boards/index.php?showtopic=209573
http://www.highend3d.com/boards/index.php?showtopic=204453

A more involved solution might involve creating particles with a goal force, or surface attraction, then pushing the particles by a fluid while at the same time having an expression that has particles emit velocity into the fluid grid. This allows for a fluid motion, but with a goal force that is updated every step. If one wished to also have density on the fluid, one could either emit fluid density where the particles are emitted, or emit density from the particles into the fluid with an expression ( and have the fluid density dissipation very high ).
Normally the fluid is incompressibile. If emitting from the particles into the fluid, some compression may be desirable to better follow the particles. This can be achieved by setting the fluid simulationQuality very low.

The emission expressions would use fluidVoxelInfo and setFluidAttr commands(you could search this forum for these commands for more info)

I'm not sure how well this would work, but if you try it please post how it goes.

Duncan