private static bool Legalize(DTSweepContext tcx, DelaunayTriangle t)
{
for (int i = 0; i < 3; i++)
{
if (t.EdgeIsDelaunay[i])
{
continue;
}
DelaunayTriangle ot = t.Neighbors[i];
if (ot == null)
{
continue;
}
TriangulationPoint p = t.Points[i];
TriangulationPoint op = ot.OppositePoint(t, p);
int oi = ot.IndexOf(op);
if (ot.EdgeIsConstrained[oi] || ot.EdgeIsDelaunay[oi])
{
t.SetConstrainedEdgeAcross(p, ot.EdgeIsConstrained[oi]);
continue;
}
if (!TriangulationUtil.SmartIncircle(p, t.PointCCWFrom(p), t.PointCWFrom(p), op))
{
continue;
}
t.EdgeIsDelaunay[i] = true;
ot.EdgeIsDelaunay[oi] = true;
RotateTrianglePair(t, p, ot, op);
if (!Legalize(tcx, t))
{
tcx.MapTriangleToNodes(t);
}
if (!Legalize(tcx, ot))
{
tcx.MapTriangleToNodes(ot);
}
t.EdgeIsDelaunay[i] = false;
ot.EdgeIsDelaunay[oi] = false;
return(true);
}
return(false);
}