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How to get the "flow" look without moving

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Dakota Joe
How to get the "flow" look without moving
on Feb 2, 2006 at 1:16:06 am

Hi,

Just started playing - uh...I mean, working with PI3 -- it's wonderful.

Question: I want to make a being appear like he is on fire (like the Human Torch) but I want the scenery to move and for him to stay basically in place. How can I get the flame to trail behind his body without dragging the emitter? (I can get the look I want easily when I drag the emitter, but then, of course, my character would have to change his position relative to the camera to maintain this effect) Currently, I am working with NEW SLOW FLAMES 01 in emitters_05_06.il3

Thanks.


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Aharon Rabinowitz
Re: How to get the "flow" look without moving
on Feb 2, 2006 at 2:16:42 pm

It depends on what your doing - if he's just staying in the middle, and it's falling behind him, for this emitter, it's a simple matter of just setting the particle type's (called cloud) weight to a positive number. Right now it's set to negative, which makes the flames go up instead of down.

On the other hand, if there's a lot of motion, and your character changes direction, then you need to do a mix of animating the layer's offset property, in the direction the background appears to be moving (which moves everything in the layer, including your emitter, without creating the drag effect), and next move the emitter back to it's original position on the screen. So basically, it's like the equivilent of gettin on an escalatior backwards and wailking in place. The floor, which would be like your particles, continue to move behind you, while you (the emitter) stay still.

Make sense?

----------------------------------------
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
----------------------------------------
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com


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Alan Lorence
Re: How to get the "flow" look without moving
on Feb 2, 2006 at 2:38:38 pm

Another option (simpler?) may be to add some velocity to the particles, change the emission range to 0 and emission angle to match the direction you want them to "flow", and possibly change the particle angle option to "align to motion".




Alan.
wondertouch


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Aharon Rabinowitz
Re: How to get the "flow" look without moving
on Feb 2, 2006 at 2:58:07 pm

duh- I always assume the easy stuff's been tried and go straight for the complicated solutions.

Sorry about that.

----------------------------------------
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
----------------------------------------
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com


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Dakota Joe
Re: How to get the "flow" look without moving
on Feb 4, 2006 at 4:49:07 am

Thanks, you guys! I'll try what you suggest and get back to you.


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Dakota Joe
Re: How to get the "flow" look without moving
on Feb 4, 2006 at 7:31:35 am

Well...I definitley have a lot to learn. I guess I did not understand what you said, because I did not get the desired result.

Essentially what I really want is to have the "flaming trail" effect (as in "fire_01") without having to drag the emitter to get the effect. That look is exactly what I want. :o


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Alan Lorence
Re: How to get the "flow" look without moving
on Feb 4, 2006 at 1:49:58 pm

ok, here are the exact steps to do using Aharon's method of animating layer offset.

1) start a new project.
2) add the "new flames 01" emitter (or whichever one you want) to the center of the stage.
3) click layer "offset" in the hierarchy.
4) click at the left side of the stage
5) jump to frame 90 using whatever method you want.
6) click at the right side of the stage.

At this point you should see the layer offset animated across the stage, and your emitter has now disappeared off-stage right. You should still be at frame 90.

7) select the emitter in the hierarchy
8) switch to "select" mode by hitting the "A" key
9) switch to "Move" mode by hitting the "M" key, then move the mouse (no clicking) to the left until your emitter is back in the center of the stage, then click.

Now play your animation and you will see the flames trail with the emitter not moving. Some tweaking will be needed.

This is also the same technique described in this old tutorial on our website:
http://www.wondertouch.com/tutorials/wind_01/Layer_Offset_wind.htm





Alan.
wondertouch


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Aharon Rabinowitz
Re: How to get the "flow" look without moving
on Feb 5, 2006 at 12:45:28 am

In Alan's approach, you need to raise the velocity value, and lower the emission range values to something like 20. This makes the flames shoot out of one direction

If you want more flames, increase the number property value.

If it's going in the wrong direction, play with the emission angle value.

----------------------------------------
Aharon Rabinowitz
aharon(AT)yahoo(DOT)com
http://www.allbetsareoff.com
----------------------------------------
Creative Cow Master Series DVD
particleIllusion Fusion Volume 1
available @ http://www.pIllusionFusion.com


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Dakota Joe
Re: How to get the "flow" look without moving
on Feb 5, 2006 at 6:44:38 pm

Thanks a lot! Very helpful. (it works!) I really appreciate you both taking the time to help me. This is an amazing program -- everytime I use it, I think about how much more time and work it would take to create the same effect with any other program.


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