Creating bridge placement rules

Bridge placement rules

A bridge placement rule says how many bridges and of what length will be placed on a object whose length falls within a certain interval. Bridge placement rules are defined in the same way for all three types of objects — lines, arc and circles.
When you create a bridge placement rule, you create a length interval. In the table, a length interval is determined by two successive rows: the upper one determines the lower threshold of the interval; the lower one determines the upper threshold of the interval.

A length interval as defined in the table. The upper row determines how many bridges of what length will be placed on the objects whose length is between 13 mm and 50 mm. In this case, one 2-mm-long bridge will be placed on these objects.

When a new row is created, it appears above the currently selected row and its Bridge length value is the half of the interval that existed prior to the adding of the new row.
In the table, if you click outside a row, a new rule will appear above the topmost rule. Its base length value will follow the method described in the previous note.
In the table, the first row serves as the upper threshold of the interval starting at zero (0) — its lower threshold is never visible in the table. No bridges are placed on the objects that fall within this interval.
IMPORTANT: The Base Length value of the first row cannot be zero (0).
The last row determines an open-ended interval — the rule set in it applies for all objects whose length is above the value set in the Base length column.
In the table, the Up to column is read-only. Prinect computes the value automatically.

In the table, rules are created for bridges with length: (1) from zero to 12.99 mm — no bridges. (2) from 13.00 mm to 49.99 mm — one 2-mm-long bridge. (3) from 50 mm to 99.99 mm — two 5-mm-long bridges. (4) from 100 mm to 399.99 mm — three 5-mm-long bridges. (5) above 400 mm — four 5-mm-long bridges and an extra bridge per each 150-mm distance.

To create a rule

The following procedure concerns only how rules are created in the table. It is part of the procedures for both creating and editing a bridge template, but does not comprise them.
The procedure applies for the three types of objects — line, arc and circle.

In the table, right-click, select a length row, and then click Add new rule.
In the Base length column, click, and then enter a new value for the base length. NOTE: It must be greater than the previous one and lower than the next one.
In the Base bridges column, click, and then enter how many bridges you want placed for a rule that falls within the set length interval.
In the Bridge length column, click, and then enter a value for how long you want the bridges in the interval to be.
In the Extra bridge at column, click, and then enter additional length at which you want an extra bridge placed.
Select the placement pattern in which you want the bridges distributed along the rule: 1–1–1 or 1–2–1.