void FloodFrom(Region tregion, Location start, Location c, Material mat, double maxRad)
{
if ((c - start).LengthSquared() > maxRad * maxRad)
{
return;
}
if (tregion.GetBlockMaterial(c) != Material.AIR)
{
return;
}
tregion.SetBlockMaterial(c, mat);
foreach (Location dir in FloodDirs)
{
FloodFrom(tregion, start, c + dir, mat, maxRad);
}
}