/// <summary>
/// Check a subsegment's deallocation.
/// </summary>
internal static bool IsDead(SubSegment sub)
{
return(sub.subsegs[0].seg == null);
}
/// <summary>
/// Set a subsegment's deallocation.
/// </summary>
internal static void Kill(SubSegment sub)
{
sub.subsegs[0].seg = null;
sub.subsegs[1].seg = null;
}
/// <summary>
/// Set a subsegment's deallocation.
/// </summary>
internal static void Kill(SubSegment sub)
{
sub.subsegs[0].seg = null;
sub.subsegs[1].seg = null;
}
/// <summary>
/// Dissolve a subsegment bond (from one side).
/// </summary>
/// <remarks>Note that the other subsegment will still think it's
/// connected to this subsegment.</remarks>
internal void Dissolve(SubSegment dummy)
{
seg.subsegs[orient].seg = dummy;
}
/// <summary>
/// Dissolve a subsegment bond (from one side).
/// </summary>
/// <remarks>Note that the other subsegment will still think it's
/// connected to this subsegment.</remarks>
internal void Dissolve(SubSegment dummy)
{
seg.subsegs[orient].seg = dummy;
}
/// <summary>
/// Check a subsegment's deallocation.
/// </summary>
internal static bool IsDead(SubSegment sub)
{
return sub.subsegs[0].seg == null;
}
/// <summary>
/// Create a new subsegment with orientation zero.
/// </summary>
/// <param name="newsubseg">Reference to the new subseg.</param>
internal void MakeSegment(ref Osub newsubseg)
{
var seg = new SubSegment();
seg.hash = this.hash_seg++;
seg.subsegs[0].seg = dummysub;
seg.subsegs[1].seg = dummysub;
seg.triangles[0].tri = dummytri;
seg.triangles[1].tri = dummytri;
newsubseg.seg = seg;
newsubseg.orient = 0;
subsegs.Add(seg.hash, seg);
}
private void Initialize()
{
dummysub = new SubSegment();
dummysub.hash = DUMMY;
// Initialize the two adjoining subsegments to be the omnipresent
// subsegment. These will eventually be changed by various bonding
// operations, but their values don't really matter, as long as they
// can legally be dereferenced.
dummysub.subsegs[0].seg = dummysub;
dummysub.subsegs[1].seg = dummysub;
// Set up 'dummytri', the 'triangle' that occupies "outer space."
dummytri = new Triangle();
dummytri.hash = dummytri.id = DUMMY;
// Initialize the three adjoining triangles to be "outer space." These
// will eventually be changed by various bonding operations, but their
// values don't really matter, as long as they can legally be
// dereferenced.
dummytri.neighbors[0].tri = dummytri;
dummytri.neighbors[1].tri = dummytri;
dummytri.neighbors[2].tri = dummytri;
// Initialize the three adjoining subsegments of 'dummytri' to be
// the omnipresent subsegment.
dummytri.subsegs[0].seg = dummysub;
dummytri.subsegs[1].seg = dummysub;
dummytri.subsegs[2].seg = dummysub;
}
/// <summary>
/// Deallocate space for a subsegment, marking it dead.
/// </summary>
/// <param name="dyingsubseg"></param>
internal void SubsegDealloc(SubSegment dyingsubseg)
{
// Mark the subsegment as dead. This makes it possible to detect dead
// subsegments when traversing the list of all subsegments.
Osub.Kill(dyingsubseg);
subsegs.Remove(dyingsubseg.hash);
}
/// <summary>
/// Dissolve a bond (from the triangle side).
/// </summary>
internal void SegDissolve(SubSegment dummy)
{
tri.subsegs[orient].seg = dummy;
}
/// <summary>
/// Dissolve a bond (from the triangle side).
/// </summary>
internal void SegDissolve(SubSegment dummy)
{
tri.subsegs[orient].seg = dummy;
}