Tài liệu Defining a Boundary ppt

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Defining a Boundary

We contend with boundaries every day. Although boundaries can take many forms—

physical, financial, mental—in the end they're nothing more than an indication of a limit.

To make a boundary work, you define its limits and take appropriate action when (or just

before) those limits are exceeded. Think of driving a car: lines on the road define the

boundaries within which the car is supposed to remain. If you're approaching the line on

the left (the left boundary), you move the steering wheel to adjust; if you're approaching

the line on the right, you adjust in the opposite direction—conditional logic in action!

Written in ActionScript, those actions might look like this:

if (car_mc._x < leftOfRoad) {

turnWheel ("right");

} else if (car_mc._x > rightOfRoad) {

turnWheel ("left");

}