Golfing on the hills

Been back to play around the physic engine project(codename Thechariot) and focusing on the golfing aspect of it.
With smaller levels and more focused design I have it up and running on html5 without too much sweat and dips in framerate.

Now I'm working on some tools to give the player a bit of insight on the shot is gonna try such as when the wood is ready to hit the ball again wich is already working by simply connecting the delay beetwen shot with a change of sprite.
The guiding line is giving me a bit more headache because I can easely draw a line beetwen 2 object but I'm still not sure how to project it toward the hypothetical shot direction. I could try to use an orbiting invisible object around the ball but I prefer solving it by code right now.

A great satisfaction has come by following this tutorial by 1up indie that show how to make the grass or other object skew around simulating the wind.
I adapted the code to react as the player pass by and for another cool object that I want to show next time and making me loose time because I love to interact with.

Have a goodday everybody :D