Surf Longjump Plugin

I want to know if its possible doing this . See this pic i made to be easier to understand how a Surf Longjump works.

http://imageshack.us/photo/my-images/822/surflj.png/

The plugin would messure the distance between the green dot and the blue dot.

no one would like to do this project?
world-surf community would be very glad =/