){kind=link}
//private static double FlipY(double y, Geometry.Extent2D viewBox)
//{
// return viewBox.min.y + viewBox.max.y - y;
//}
//private static Geometry.Point2D FlipY(Geometry.Point2D p, Geometry.Extent2D viewBox)
//{
// double y = viewBox.min.y + viewBox.max.y - p.y;
// return new Geometry.Point2D(p.x, y);
//}
//private static List<Geometry.Point2D> FlipY(IEnumerable<Geometry.Point2D> points, Geometry.Extent2D viewBox)
//{
// return points.Select(p => FlipY(p, viewBox)).ToList();
//}
// 世界坐标绘图函数以Add开头
public void AddLine(double x1, double y1, double x2, double y2)
{
x1 = _calcx(x1);
y1 = _calcy(y1);
x2 = _calcx(x2);
y2 = _calcy(y2);
_svgWriter.AddLine(x1.ToString("0.##"), y1.ToString("0.##"), x2.ToString("0.##"), y2.ToString("0.##"));
}