Creating Fences

Use soft fences to control routing in a rectangular or polygonal area. When routing with fences the following guidelines usually apply:

• If all terminals of a net are outside of fence areas, all wiring for the net must be outside of fence areas.
• If all terminals of a net are inside of a fence area, all wiring for the net must be inside of the fence area.
• If terminals of a net are inside and outside of a fence area, then the wiring for the net can cross the fence to make the connection.

The soft fence boundary is viewable in the workspace and its visibility is controlled by the area_boundary:soft fence entry in the Object section of the Layer Object Display Panel.

To create a rectangular fence that covers the current workspace area,

create_soft_fence -name fence1 -region [get_window_area]

Related Topics

Preparing the Routing Environment