Directional Radio Waves that animate and move between two points

Question

I want to figure out how to have a radio wave effect that is directional and looks like ) ) ) ) ) ) ), with the beginning point moving along tracking point 1, and the end of the waves moving along tracking point 2. I want it to behave similarly to the attached video, where I have dashed lines animating between three points. I did this effect by using the 'create nulls from path' tool under Windows and attaching those nulls to my tracking points. I plan on doing this multiple times in one composition, so any help would be great! Thank you

Rick Gerard · Accepted Answer

The closest thing I can think of is to add a mask to a text layer filled with ))))))))))))

Attach your nulls to the path, add the path to the text, animate the first margin until you get two of the letters to line up, and add a loopOut() expression.

Anything else I think of (like Echo or some 3rd party effects) will have the repeated shapes come off the path as it moves. There is probably another way, but I can't think of it right now.

This is what the comp looks like:

The frame rate of the GIF kind of fouls up the look. Maybe this will give you an idea you can use.

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