Abstract: A golf simulator includes a target screen that receives a projected image of a golf hole from a player's view. As a player hits a ball into the target screen, a main controller analyzes the swing and displays the path of the golf ball using a spotlight generated by a tracer. A slice/hook determining apparatus includes a clubhead impact angle sensor for determining the clubhead impact angle at impact with the ball. A controller in the slice/hook determining apparatus calculates a theoretical impact point where the ball would hit the impact screen if no side spin were imparted on the ball. The main controller compares the theoretical impact point with the actual impact point and accurately determines a slice/hook component of the ball trajectory based on the difference between the actual impact point and the theoretical input point.