The straight parametric footprints must be created considering length as a parameter. You will then need to enter a parametric footprint for each width measurement. Since a "STRETCH" operation is performed on the parametric straights, you must provide the program the stretching coordinates and direction. To achieve this, use the sets of mates. There are particular mates to define the stretching area and a mate to define the direction.

The stretch mates are called "SNAP_STRETCH_AREAnn" (where nn can range from 01 to 99) and must be entered in order as leaders of the stretch range. The example shown the polygon that is a simple rectangle, so that four mates (SNAP_STRETCH_AREA01 - SNAP_STRETCH_AREA04) positioned in the four corners of the rectangle are sufficient.

It's very important to respect the order of insertion of mates; otherwise, the stretching effect will be wrong. The direction mate is called "SNAP_STRETCH_DIR" and can be placed anywhere on the drawing. In this case, the angle of insertion of the mate is very important. The angle defines the stretching direction. To facilitate the definition of the direction of stretching, the mate has a rather special shape.

The arrow clearly indicates the direction of stretch.

The straight parametric footprints must be drawn with a base length of 1,000 drawing units. In this way, the software will be able to bring them to the proper size.