/// <summary>
/// 绘制地铁站点间的线路。
/// </summary>
/// <param name="g">绘图图面。</param>
/// <param name="link">地铁站点间的线路。</param>
private void PaintLink(Graphics g, MetroLink link)
{
Point pt1 = new Point(link.From.X, link.From.Y);
Point pt2 = new Point(link.To.X, link.To.Y);
using (Pen pen = new Pen(link.Line.Color, 5))
{
pen.LineJoin = LineJoin.Round;
if (link.Flag == 0)
{//单线
g.DrawLine(pen, pt1, pt2);
}
else if (link.Flag > 0)
{//双线并轨（如果是同向，则Flag分别为1和2，否则都为1）
float scale = (pen.Width / 2) / Distance(pt1, pt2);
float angle = (float)(Math.PI / 2);
if (link.Flag == 2)
{
angle *= -1;
}
//平移线段
var pt3 = Rotate(pt2, pt1, angle, scale);
var pt4 = Rotate(pt1, pt2, -angle, scale);
g.DrawLine(pen, pt3, pt4);
}
}
}
/// <summary>
/// 最佳一条新的Link，并返回一条新的路线。
/// </summary>
/// <param name="link"></param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">如果link为空引用，则跑出该异常。</exception>
public MetroPath Append(MetroLink link)
{
if (link == null) throw new ArgumentNullException("link");
MetroPath newPath = new MetroPath();
newPath.Links.AddRange(this.Links);
newPath.Links.Add(link);
return newPath;
}
/// <summary>
/// 最佳一条新的Link，并返回一条新的路线。
/// </summary>
/// <param name="link"></param>
/// <returns></returns>
/// <exception cref="ArgumentNullException">如果link为空引用，则跑出该异常。</exception>
public MetroPath Append(MetroLink link)
{
if (link == null)
{
throw new ArgumentNullException("link");
}
MetroPath newPath = new MetroPath();
newPath.Links.AddRange(this.Links);
newPath.Links.Add(link);
return(newPath);
}
/// <summary>
/// 绘制地铁站点间的线路。
/// </summary>
/// <param name="g">绘图图面。</param>
/// <param name="link">地铁站点间的线路。</param>
private void PaintLink(Graphics g, MetroLink link)
{
Point pt1 = new Point(link.From.X, link.From.Y);
Point pt2 = new Point(link.To.X, link.To.Y);
using (Pen pen = new Pen(link.Line.Color, 5))
{
pen.LineJoin = LineJoin.Round;
if (link.Flag == 0)
{//单线
g.DrawLine(pen, pt1, pt2);
}
else if (link.Flag > 0)
{//双线并轨（如果是同向，则Flag分别为1和2，否则都为1）
float scale = (pen.Width / 2) / Distance(pt1, pt2);
float angle = (float)(Math.PI / 2);
if (link.Flag == 2) angle *= -1;
var pt3 = Rotate(pt2, pt1, angle, scale);
var pt4 = Rotate(pt1, pt2, -angle, scale);
g.DrawLine(pen, pt3, pt4);
}
}
}