bool fill_planar()
{
Vector3d n = Vector3d.Zero, c = Vector3d.Zero;
int NE = FillLoop.EdgeCount;
for (int k = 0; k < NE; ++k)
{
int eid = FillLoop.Edges[k];
n += Mesh.GetTriNormal(Mesh.GetEdgeT(eid).a);
c += Mesh.GetEdgePoint(eid, 0.5);
}
n.Normalize(); c /= (double)NE;
var filler = new PlanarHoleFiller(Mesh);
filler.FillTargetEdgeLen = TargetEdgeLength;
filler.AddFillLoop(FillLoop);
filler.SetPlane(c, n);
bool bOK = filler.Fill();
return(bOK);
}