public Ellipse()
{
m_Origin = new Point2D();
m_rx = 1.0;
m_ry = 1.0;
m_scale = 1.0;
m_num = 4;
m_step = 0;
m_cw = false;
}
public void init(double OriginX, double OriginY, double RadiusX, double RadiusY,
int num_steps, bool cw)
{
m_Origin = new Point2D(OriginX, OriginY);
m_rx = RadiusX;
m_ry = RadiusY;
m_num = num_steps;
m_step = 0;
m_cw = cw;
if (m_num == 0) calc_num_steps();
}