You could probably accomplish this in many ways, the easiest being if it’s just a simple shape, use the pen tool to create a shape layer that follows the curve path. Then open up the shape layer > Stroke 1 > Dashes and press the “+” to enable dashes.
Highlight Click the “Path” and copy it. Now create a comp size solid and add a mask point. Now click the “Mask Path” and paste the path from your shape in there. Finally add & animate a stroke effect and use it as a track matte for your dashes.
There might be a better way to animate the dashes from within the shape layer, but I don’t use shapes enough to know exactly how to reveal along the paths. Maybe someone else does. Another method you could use, if you have really good video steady video is to use the tracker to track the motion of the pencil head, and copy those position frames to a path, and create your dashes that way. The reveal step would be the same.
Here’s a quick example project that I hope points you in the right direction. 5553_revealdashes.aep.zip
Johnny Cuevas, Editor
Thinkck.com
“I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
—THOMAS EDISON on inventing the light bulb.