Travel lines?

I'm working on a video of an object travelling around a map, and I'd
like to have a dotted line follow it around, showing its path as it moves.

I know Motion has Motion Paths and the ability to Align an object
to a motion path. This made it easy to make my object move along
a spline path and maintain it's orientation properly.

However, the dotted line part is causing me some trouble. I tried using
a particle emitter, and I noticed that you can use geometry in the emitter
and specify a spline. I specified the spline path for my object, but that
just causes particles to be emitted from every point on the spline path.

I'm thinking I may need to have the dotted line path already plotted
out in a graphic, and then keyframe a mask as the object moves around
on the path, reveal more of the dotted line path.

It seems like there might be an easier way to accomplish this in Motion
w/o keyframes, but I'm a bit stuck at the moment.. any other suggestions
would be greatly appreciated.

Thanks,
Kevin

Hi Kevin,

Although, the following in not the solution for "motion", but this is my way to due with a traveling object around a map. Sorry, no dotted line and not spline path based.

A fxscript plug-in for FCP, I wrote this for year ago.
[homepage.mac.com]

If you like, feel free to use it.
Antonio Hui

Hey Antonio - do you sell your plug-ins anywhere? I'd love to see more of them.

Happy to know that you like my works. I wrote a lot but I have no plan to sell them, because I guess they are not good enough. I still leaning at the moment. The plug-in that I wrote are mainly for my video project or experiment.

This is the only finalized plug-in I ever wrote.
[homepage.mac.com]
(Sorry, nothings there, only the front page is ready)

Yes, it is a good idea for put the others plug-in for share too.
I will done it ASAP.

Happy Sharing.
Antonio Hui

Oops... I still learning at the moment...

Well thank you for the ones you have shared with us at these forums.