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# Particles on a Motion Path in Motion 4

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 Particles on a Motion Path in Motion 4 by Luke Henry Vanden Bosch on Jun 24, 2010 at 4:07:26 pm

I'm trying to get some particles to follow a motion path.

I've been using an object moving along the path and then trying to get the particles to follow that object with the 'Attract to' behavior. This makes the particles follow the object but not along the path as I guess should be expected. So if I have a wave the object follows the wave but the particles cut the corners just to follow the object.

Any help would be great.

Luke Henry
Mac Pro 4,1

 Re: Particles on a Motion Path in Motion 4by Andy Neil on Jun 24, 2010 at 4:38:04 pm

how exactly do you want the particles to behave? The easiest method for particles to follow a particular path is to make their speed 0, and then animate the emitter along the path. Particles will be born along the path but not move off it. Since the emitter is moving, new particles are born at different points along the path.

Andy

 Re: Particles on a Motion Path in Motion 4by Stephen Smith on Jun 24, 2010 at 4:42:59 pm

When I have a path such as a Bezier line I like to use the Motion Path behavior. Make sure it is set to Geometry for the path shape and place the bezier line in the Shape Source well and the particle will follow the path.

Stephen Smith
Utah Video Productions

Check out my Motion Training DVD

Check out my Motion Tutorials

 Re: Particles on a Motion Path in Motion 4by Luke Henry Vanden Bosch on Jun 24, 2010 at 5:01:11 pm

I am looking at making the particles behave like a stream of water. So a randomized group of particles that loosely stick together and follow a path.

Does that help?

Luke Henry
Mac Pro 4,1

 Re: Particles on a Motion Path in Motion 4by Andy Neil on Jun 24, 2010 at 5:10:04 pm

I'm not sure that a particle emitter is what you want. If you think of an emitter as a gun and the particle as the bullet, you're limited to how you can affect the particle once it's been emitted. You may have better luck with a replicator and the sequence replicate behavior.

Andy

 Re: Particles on a Motion Path in Motion 4by Stephen Smith on Jun 24, 2010 at 5:13:09 pm

Can you post an image of your path?

Stephen Smith
Utah Video Productions

Check out my Motion Training DVD

Check out my Motion Tutorials

 Re: Particles on a Motion Path in Motion 4by Luke Henry Vanden Bosch on Jun 24, 2010 at 7:22:27 pm

Luke Henry
Mac Pro 4,1

 Re: Particles on a Motion Path in Motion 4by Andy Neil on Jun 25, 2010 at 12:19:34 am

Like I said, you're probably better off with the replicator than with an emitter.

Andy

 Re: Particles on a Motion Path in Motion 4by Luke Henry Vanden Bosch on Jun 25, 2010 at 2:33:55 pm

To be honest I have not looked at the Replicator before. I understand the concept and the differences now. Thank you. I am still having an issue getting anything to move on the motion path though. Or are you suggesting I don't use a motion path?

Thanks.

Luke Henry
Mac Pro 4,1

 Re: Particles on a Motion Path in Motion 4by Luke Henry Vanden Bosch on Jun 25, 2010 at 3:04:17 pm

This is the look I am trying to recreate. This was created in After Effects. I am trying to get a similar look put together to use in templates within Final Cut Pro. I am also using this project to become more familiar with Motion.

http://reels.creativecow.net/film/bubbles

Thanks again.

Luke Henry
Mac Pro 4,1

 Re: Particles on a Motion Path in Motion 4by Mark Spencer on Jun 25, 2010 at 3:06:45 pm

Pretty easy to do in Motion. Use a replicator in 3D. Put the logo in a 2D group so it won't be affected by the camera. Turn on depth of field. You could animate the replicated particles as a group, or I'd tend to animate the camera to get that result - maybe a little bit of both. But perfectly doable in Motion.

--
Mark Spencer
Freelance Producer/Editor/Motion Graphics Artist
Apple-certified Master Trainer
Author, Motion 4 from Peachpit Press
http://www.applemotion.net