public List <SimpleSurface> DecomposeToSimpleSurfaces()
{
var ps = _outer.SelectMany(edge => edge.Decompose().Select(s => s.P1)).ToList();
var res = new SimpleSurface(ps);
foreach (var inner in _inners)
{
ps = inner.SelectMany(edge => edge.Decompose().Select(s => s.P1)).ToList();
res.AddInner(ps);
}
return(new List <SimpleSurface> {
res
});
}
