GHPython: Rebuild trimmed surface

Hello,

I'm trying to rebuild a trimmed surface in Python, but in the process the surface is always untrimmed. How do I stop that from happening?

My code:

import Rhino as rc

eps = rs.SurfaceEditPoints(srf)

udist = eps[0].DistanceTo(eps[2])
vdist = eps[0].DistanceTo(eps[1])

u = int(udist/resolution)
v = int(vdist/resolution)

rebuilt = srf.Rebuild(3,3,u,v)

Cheers,

Max