Cuts free space into rooms bounded by real pads and tracks and searches room to room (Freerouting).glossary, Physical / electrical concepts
Cuts free space into rooms bounded by the real pads and tracks and searches room to room (Freerouting, Altium interactive). Option B.glossary, Ants: routing and our own terms (from Nov 2026)
How it looks
Drawing: an idealised patch of board
Free space cut into rooms (dashed). The router never looks at single points, only at these shapes.