Ball starts where the club face is aimed at impact, mostly (85% for irons), and moves based on the relationship of the face to path difference.

So target will be 20 yards left of flag, club face aimed here, body aimed another 10 yard left, swing along body lines.

Ball starts where club face is aiming (20 yards left of flag), and moves based on difference between swing path and face (moves to right in this case).

This is how I play shots. It's not exact (it doesn't account any d-plane, ie...hitting down on the ball effectively shifts your swing path to the right), but it usually gets the ball moving how I want. Takes practice to see how much movement you will get based on your swing.