Lost Adventurer, Aleks Kirilenko (3D)
LC #42 Pipers Alley

View Full Version : follow a path and draw

01-25-2006, 10:32 AM
I guys,
i saw some movies where there are a camera that follow a path that draw the shape of this sort of street... (is a little bit difficult to explain for me :( ).
I hope you understand what i mean. Do you know how to do it?
thanks a lot!

01-31-2006, 04:44 PM
I try to explain in a different way.
We have a shape like an "S".... i want make it visible following her shape in animation.


01-31-2006, 10:33 PM

Piece of cake in AE. Make a new solid and apply an S-shaped open mask to it. This will be the shape your line makes as it draws on. Now apply the Stroke effect (Effects>Render>Stroke). In the effects dialog box assign your mask to the Path pulldown. Set Paint Style to paint "on transparent". Now set your "End" paramater to zero and set a keyframe. Move a couple seconds down in the timeline and set the "End" to 100. Scrub back and forth and you should have an S-shaped line drawing on over a couple seconds. If the line is drawing in the wrong direction just animate the "Start" from 0 to 100 leaving the "End" at 100. Be sure to monkey with the other liders to see how they all work together.
Now turn on 3d for the layer and animate your camera to follow the leading edge of S as it draws on.
Good luck.

Scott Sp.

02-01-2006, 08:41 AM
Wonderful Scott!!!
thanks for your piece of cake!
Now I can start experiment!

02-01-2006, 09:23 AM
Now turn on 3d for the layer and animate your camera to follow the leading edge of S as it draws on.
Won't pasting the S shaped mask into Camers's position property and click on follow path make it easier than keyframing ?
Here's a video tut on Cretive Cow:

02-01-2006, 10:17 AM
cool!! thanks a lot...

I don't remember where I see that you paint over you immage and then AE repeat your paint as a mask animation!!
Do you?

02-01-2006, 10:32 AM
If you have Illustrator open at the same time, you don't have to replicate the shape as a mask in AE.
In Illustrator, select the shape, copy
Go to AE.
Select either mask property (or position property for Camera)
and paste.
This creates roving keyframes.

Here's the first part of that tutorial:

And download the recipe card for help:

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