3d Cloud Interation

[Wick3dParticle]

Im sorry...I dont understand your description.

What is a 3d cylinder cloud? and how is this cloud kinda stuck to your object?

~Ilan

[Sinsatanme]

what i'm trying to do is to take the 3d cylinder and make it react to the cloud .. like a natural effect ..
the way its swirling.. the cloud is supposed to swirl once it comes in contact with the 3d object .. need to know how it would be done ..

for eg: when a jet plan runs through a cloud it takes a lil bit of cloud with it .like drags it and stuff..

[Wick3dParticle]

Hey Sinsatanme.

From what I see in your scene file, you have a non dynamic cloud system here. As for as I know there is no way to interact with that kind of fluid system because it is texture driven, not dynamic.

You may want to consider alternative techniques, such as:

fluid shaded particles
or dynamic dluid systems with motion feilds and collision objects.


~Ilan

[Duncan]

The cloudbanks create the fluid through texture, but it is possible to push the texture coordinates around. Make the velocityGrid dynamic on the fluid, the coordinateMethod = Grid and the coordinateSpeed = 1. Select the fluid and the cylinder and do fluid>make motion field. In this case I found that the magnitude of the motion field(a drag field with inheritMotion) was too high, so I lowered it to 1.0. As well I made the volume shape on the motion field a cylinder to better fit your object and scaled it up a bit. As well I increased the viscosity on the fluid to make the push effect smoother. (see attached file) Ultimately when pushing coordinates around the texture quickly looses its character and become streaked. If you don't want that then it might work better to create clouds with fluid shaded particles and push them around.

Duncan

[Wick3dParticle]

Hey Duncan,

Thanks for clarifying that. Though I opened your file in 2008 (that's what I have at work) and it doesn't seem to be working as you described. I see a container which is filled using a constant as the opacity input, and the motion field stirring through it; but the fluid remains static.

Thanks,

~Ilan

[viki164]

hey guys,
I did a quick test of 3d cloud swirl of what Duncan has suggested!
his tips are always life saving kind. have check with my quick Wip cloud swirl test & let me know if there is any better ways of achieving similar effects. currently i m using a volumetric fied for the fluids & fluids velocity is set to dynamic & texture co-ordinates to Grid. I m not quite happy of wt I have got so far coz I m looking for a swirl which is there in Pearl Harbour shot it has nice swirls in cloud. Critics & comments are always welcome.

plz check :

http://in.youtube.com/watch?v=F_XkabijJTk
or
http://s463.photobucket.com/albums/qq359/viki164/?action=view&current=tstswirlcloud2_2.flv

thnxs

Eager Yung Minds.

Viki

[Wick3dParticle]

Ah...nevermind my previous post... Thats pretty cool! Just learned something new. Thanks everyone.

~Ilan

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