protected virtual void OverlayFn(LineSeg a,
LineSeg b,
double ang_tol,
double distsqtol,
out LineSeg before,
out bool a_before,
out LineSeg overlap,
out LineSeg after,
out bool a_after)
{
LineSeg.Overlay(a, b, Vector.GetParTolerance(ang_tol), distsqtol,
out before, out a_before, out overlap,
out after, out a_after);
}
private bool insertFrag(T src,
LineSeg l,
IIndexedSeg cand,
Stack <IIndexedSeg> cand_remainders,
Stack <LineSeg> l_remainders)
{
Fragment frag = cand.Val as Fragment;
LineSeg a, b, o; bool l_before, l_after;
LineSeg.Overlay(l, frag.LineSeg, m_atol, m_dtolsq,
out b, out l_before, // leftover before
out o,
out a, out l_after); // leftover after
if (o != null) // There was an overlay...
// For partial overlays, manage any leftovers that are
// already in the index.
{
if (b != null && !l_before)
{
Fragment nfraga, nfragb;
frag.Split(out nfraga, b, out nfragb, o);
Pair <IIndexedSeg, IIndexedSeg> sp =
m_index.Split(cand, nfraga, nfragb);
// relable 'c' and 'frag' to point at the overlaping part.
cand_remainders.Push(sp.First);
cand = sp.Second;
frag = nfragb;
}
if (a != null && !l_after)
{
Fragment nfraga, nfragb;
frag.Split(out nfraga, o, out nfragb, a);
Pair <IIndexedSeg, IIndexedSeg> sp =
m_index.Split(cand, nfraga, nfragb);
// relable 'c' and 'frag' to point at the overlaping part.
cand_remainders.Push(sp.Second);
cand = sp.First;
frag = nfraga;
}
// Attribute the overlapping portion w/ the source line.
frag.Sources = frag.Sources.Cons(src);
// And manage any leftovers that are -not- part of the index.
if (b != null && l_before)
{
l_remainders.Push(b);
}
if (a != null && l_after)
{
l_remainders.Push(a);
}
return(true);
}
else
{
// No overlap so leftovers are complete.
cand_remainders.Push(cand);
return(false);
}
}