| router algo | state | 
|---|
| horver | Make sure pin/pad centers are aligned on a (preferrably >=100mil) grid.
        Precise grid alignment is essential for this router. Make sure you do
        not have any pin larger than your via setting. 
        Bug: some escape lines will run too close to the pin.
 
 | 
| rt_topo/trbs | Bug: depending on the triangulation, some line segments may run too
        close to the corner of rectangular pads or to round pads. | 
| rt_topo/crbs | Limitations: 
         because of the convex-only approach currently implemented,
        some traces include unnecessary curves, especially around rectangular
        pads.
         because of the same convex-only limitation and missing corridor
             code, some rats are not routed or go around far away obstacles in
             long detours
         |