private void AddToTheRightGroup(ref BBox b1, ref int count1, int lp, ref int rp, ObjectWithBox g)
{
Swap(lp, rp);
rp--;
b1.Add(g.Box);
count1++;
}
private static void AddToTheLeftGroup(ref BBox b0, ref int count0, ref int lp, ObjectWithBox g)
{
lp++;
count0++;
b0.Add(g.Box);
}