if you draw a straight line between the avoider's center, and the obstacle's centers, then take the line from the avoider to it's destination, whichever side the line is on relative to the center line, is the side you should turn toward.

if you draw a straight line between the avoider's center, and the obstacle's centers, then take the line from the avoider to it's destination, whichever side the line is on, is the side you should turn toward.