Travel lines around the earth
by Simon Levshin
on
Jul 31, 2008 at 10:21:19 am
Hi everyone,
I'm trying to create travel lines (as in aeroplane routes), that
animate over the earth from one central lcoation. Problem is the earth
is scaling down. I've drawn a mask but I need one end of the mask to stay
in position on the globe (motion track perhaps) and have them "bend"
over the earth to the other side.
Re: Travel lines around the earth by Patrick Hearn on Jul 31, 2008 at 10:49:06 am
OK. I'm going to assume your setup is this:
·image of earth as a globe
·paths for lines
·stroke effect animated to draw onto paths
Now you say the earth is scaling down... I'm guessing you start in close and then move out. Perhaps precomp the earth and masks and scale that.
Better yet, if you want a better looking move away (if indeed that is what you're doing) make the precomp a 3d layer and create a camera. Now snimate the camera away from the layer. The rate of size change is much more natural this way.
Re: Travel lines around the earth by William J. Meyer on Jul 31, 2008 at 3:36:50 pm
Hi Simon,
How about this:
Create two precomps of identical dimensions, twice as wide as they are tall. One of these will be your map of the Earth. The other will be the animation of your airplane routes over a transparent background.
In a master comp, apply CC Sphere to each of the above precomps. Give the airplane route comp a slightly larger radius. Now the routes will bend over the Earth globe but maintain their starting point.
Of course, you'll have to fiddle with the CC Sphere controls to turn the globe properly toward the viewer.
Re: Travel lines around the earth by Thad Ciechanowski on Jul 31, 2008 at 4:13:12 pm
The trouble with that is the lines can't "arc" back to the Earth. I've had to do this same effect and I wound up using the method of the above poster: making a flat map with the lines, pre-comping, and the using ccSphere.
This is tough in AE because you can't create 3D objects. If any of these workarounds won't do, try Zaxwerks to create the sphere, or Trapcode 3D Stroke to create a 3D stroke on the sphere (still difficult though).
