How to make a wave that follows empty? So I'm trying to make it so that when the empty goes across the object it creates a wave. I'm following up this question. Here's the .blend 



As you can see if you drag the empty slowly across the object it creates a single wave but if you play the animation it just makes multiple waves. I'm trying to re-create the effect you get from dragging the empty across the object. How would you do this? 

Thanks!
To make just one wave uncheck the Cyclic option on the wave modifier.

Then just find the proper offset so that when the empty moves across the object the wave occurs.







EDIT

Another option I can think of (not knowing what you are after ultimately) is not using a wave modifier but a displace modifier, and using the empty to control the texture. Animating the strenght as the empty goes across the sphere can give a nice result: