Original polyline or offset distance = 0

[seghier]

Hello
When i save svg file i get the result without the original polyline,
Is this how Clipper2 works or i miss something?

[AngusJohnson]

I can't help without a simple code sample.
But the SvgWriter class requires you to add every path yourself (eg AddPath() or AddPaths() or using a wrapper function SvgAddSubject() etc). So it's up to you whether you wish to include the original path (or any other path) in the SVG image.

[seghier]

Thank you @AngusJohnson
I use AddOpenPaths and AddClosedPaths
I add this function to the code of SVG to create svg output but i get all paths separated
I want get the svg string without need to save the file everytime.

public string GetSvgContent(int maxWidth = 0, int maxHeight = 0, int margin = -1)
{
  if (margin < 0) margin = 20;
  RectD bounds = GetBounds();
  if (bounds.IsEmpty()) return string.Empty;

  double scale = 1.0;
  if (maxWidth > 0 && maxHeight > 0)
    scale = Math.Min(
        (maxWidth - margin * 2) / bounds.Width,
        (maxHeight - margin * 2) / bounds.Height);

  long offsetX = margin - (long) (bounds.left * scale);
  long offsetY = margin - (long) (bounds.top * scale);

  StringBuilder svgContent = new StringBuilder();
  StringWriter writer = new StringWriter(svgContent);

  // Write the SVG header
  if (maxWidth <= 0 || maxHeight <= 0)
    writer.Write(svg_header, (bounds.right - bounds.left) + margin * 2,
        (bounds.bottom - bounds.top) + margin * 2);
  else
    writer.Write(svg_header, maxWidth, maxHeight);

  // Iterate over PolyInfoList and write paths
  foreach (PolyInfo pi in PolyInfoList)
  {
    writer.Write(" <path d=\"");
    foreach (PathD path in pi.paths)
    {
      if (path.Count < 2) continue;
      if (!pi.IsOpen && path.Count < 3) continue;
      writer.Write(string.Format(NumberFormatInfo.InvariantInfo, " M {0:f2} {1:f2}",
          (path[0].x * scale + offsetX),
          (path[0].y * scale + offsetY)));
      for (int j = 1; j < path.Count; j++)
      {
        writer.Write(string.Format(NumberFormatInfo.InvariantInfo, " L {0:f2} {1:f2}",
        (path[j].x * scale + offsetX),
        (path[j].y * scale + offsetY)));
      }
      if (!pi.IsOpen) writer.Write(" z");
    }

    if (!pi.IsOpen)
      writer.Write(string.Format(NumberFormatInfo.InvariantInfo, svg_path_format,
          ColorToHtml(pi.BrushClr), GetAlpha(pi.BrushClr),
          (FillRule == FillRule.EvenOdd ? "evenodd" : "nonzero"),
          ColorToHtml(pi.PenClr), GetAlpha(pi.PenClr), pi.PenWidth));
    else
      writer.Write(string.Format(NumberFormatInfo.InvariantInfo, svg_path_format2,
          ColorToHtml(pi.PenClr), GetAlpha(pi.PenClr), pi.PenWidth));

    if (pi.ShowCoords)
    {
      writer.Write("<g font-family=\"{0}\" font-size=\"{1}\" fill=\"{2}\">\n", coordStyle.FontName, coordStyle.FontSize, ColorToHtml(coordStyle.FontColor));
      foreach (PathD path in pi.paths)
      {
        foreach (PointD pt in path)
        {
          writer.Write("<text x=\"{0:f2}\" y=\"{1:f2}\">{2},{3}</text>\n", (Math.Round(pt.x, 2) * scale + offsetX), (Math.Round(pt.y, 2) * scale + offsetY), Math.Round(pt.x, 2), Math.Round(pt.y, 2));
        }
      }
      writer.Write("</g>\n\n");
    }
  }

  // Write textInfos
  foreach (TextInfo captionInfo in textInfos)
  {
    writer.Write("<g font-family=\"Verdana\" font-style=\"normal\" " +
                 "font-weight=\"normal\" font-size=\"{0}\" fill=\"{1}\">\n", captionInfo.fontSize, ColorToHtml(captionInfo.fontColor));
    writer.Write("<text x=\"{0}\" y=\"{1}\">{2}</text>\n</g>\n", captionInfo.posX * scale + offsetX, captionInfo.posY * scale + offsetX, captionInfo.text);
  }

  // Close the SVG content
  writer.Write("</svg>\n");
  writer.Close();

  return svgContent.ToString();
}