void ProcessRegion(Action<Triangle> func)
{
Otri testtri = default(Otri);
Otri neighbor = default(Otri);
Osub neighborsubseg = default(Osub);
Behavior behavior = mesh.behavior;
// Loop through all the infected triangles, spreading the attribute
// and/or area constraint to their neighbors, then to their neighbors'
// neighbors.
for (int i = 0; i < viri.Count; i++)
{
// WARNING: Don't use foreach, viri list gets modified.
testtri.triangle = viri[i];
// A triangle is marked as infected by messing with one of its pointers
// to subsegments, setting it to an illegal value. Hence, we have to
// temporarily uninfect this triangle so that we can examine its
// adjacent subsegments.
// TODO: Not true in the C# version (so we could skip this).
testtri.Uninfect();
// Apply function.
func(testtri.triangle);
// Check each of the triangle's three neighbors.
for (testtri.orient = 0; testtri.orient < 3; testtri.orient++)
{
// Find the neighbor.
testtri.Sym(ref neighbor);
// Check for a subsegment between the triangle and its neighbor.
testtri.SegPivot(ref neighborsubseg);
// Make sure the neighbor exists, is not already infected, and
// isn't protected by a subsegment.
if ((neighbor.triangle != Mesh.dummytri) && !neighbor.IsInfected()
&& (neighborsubseg.seg == Mesh.dummysub))
{
// Infect the neighbor.
neighbor.Infect();
// Ensure that the neighbor's neighbors will be infected.
viri.Add(neighbor.triangle);
}
}
// Remark the triangle as infected, so it doesn't get added to the
// virus pool again.
testtri.Infect();
}
// Uninfect all triangles.
foreach (var virus in viri)
{
virus.infected = false;
}
// Empty the virus pool.
viri.Clear();
}
