public bool Equals(LPoint obj)
{
if (X == obj.X && Y == obj.Y) return true;
return false;
}
public void MergeRectWithPoint(LPoint point)
{
long x_min = Math.Min(m_x1, point.X);
long y_min = Math.Min(m_y1, point.Y);
long x_max = Math.Max(m_x2, point.X);
long y_max = Math.Max(m_y2, point.Y);
m_x1 = x_min;
m_x2 = x_max;
m_y1 = y_min;
m_y2 = y_max;
}