public void addChild(Leaf child)
{
if (!_children.Contains(child))
_children.Add(child);
if (!child._parents.Contains(this))
child._parents.Add(this);
for (int i = 0; i < GameManager.NUM_COLORS; i++)
{
if (_distToColors[i] == -1 || _distToColors[i] > GameManager.MAX_DIST_TO_COLOR[i])
child.updateDistToColor(i, -1);
else
child.updateDistToColor(i, _distToColors[i]+1);
}
}
