Engulf And Animate An Object In A 3d Container

[enyawedblak]

i am trying to finish a "short" and the only problem that i am having right now is the fact that i don't know fluids very well, but my character is supposed to be engulfed in fire.

my question is, what is the best way for me to set my character on fire? right now, i'm trying to emit directly from my character via a 3D container, but when my character stops moving, the fluid seems to stop moving also, causing my "fire" to look like molten butter.

and also, it seems that i can only emit from one object per container. is this true? or am i doing something wrong? my character's head is actually separate from the body and won't emit. the body emits just fine. (the body's emissions don't look the way i want, but at least it's emitting). so, do i need to just add another container to the scene specifically for the head? or do i just need to make some adjustments in the settings?

[allegro]

I'm not sure why you are unable to create multiple emitters... I seem to be able to do it no problem. If you select your three objects (body, head, fluid container) you should be able to go to the fluid menu, edit contents, emit from object. That's what I did to make the attached image.

As for the flames not moving when the character stops... you might need to adjust the emitter's turbulence settings, or the fluid's buoyancy, or you may need to add in some forces to continue to push your fluids upward. It's hard to say specifically what's happening in your situation without further description of what's happening in your scene.

[jtujle]

Try and start with one of the fire examples in the visor. It will give you a good starting point.

I have a feeling that your motion problems come from either high damping or low buoyancy

[lamelame]

what does emitter's turbulence means? how big the explosion is?

for example, if i wanted to create an animation of a chef cooking where he spills some liquids and fire starts spewing out in the frying pan.
how should i go about doing it?
liquids and fire and completely random, what settings would i need to perform to create that type of animation?

any forms of advice and tutorials would help.

thanks in advance.

[duncanbrinsmead]

QUOTE(Joeisme @ 10/23/07, 08:53 PM) [snapback]275342[/snapback]
what does emitter's turbulence means? how big the explosion is?

Think of it like an animated 3d fractal mapping the amount of emission. Flames can come off a burning surface in an irregular fashion(in some cases). The flames can shift around where they emit from over time( turbulence speed ). Note that fluid emitters(unlike with particles) do not directly affect the velocity of the fluid, they simply emit into the various fluid grids. Velocity can be stimulated by attributes like buoyancy and temperature turbulence( or the global turbulence, which generally should only be used sparingly). As well one can use fields, which basically "emit" into the velocity grid. After the effects of turbulence and fields are added into the velocity grid we compute how the velocities must be modified to satisfy the condition that the fluid cannot compress.

For flame and explosion effects one generally wants to use a dynamic temperature grid. Temperature buoyancy, dissipation and turbulence are some of the key attributes. The color attribute of the fluid should be near black. If it is fully black turn off self shadowing, because you won't see this effect. Most of the color comes from incandescence.

Duncan