Method DrawPathSVG

Rendering/GL2PSOpenGL2/vtkOpenGLGL2PSHelperImpl.cxx:1090–1239

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//------------------------------------------------------------------------------
void vtkOpenGLGL2PSHelperImpl::DrawPathSVG(vtkPath* path, double rasterPos[3], double windowPos[2],
  unsigned char rgba[4], double scale[2], double rotateAngle, float strokeWidth,
  const std::string& label)
{
  vtkFloatArray* points = vtkArrayDownCast<vtkFloatArray>(path->GetPoints()->GetData());
  vtkIntArray* codes = path->GetCodes();

  if (points->GetNumberOfTuples() != codes->GetNumberOfTuples())
  {
    return;
  }

  std::stringstream out;
  out.setf(std::ios_base::left | std::ios_base::fixed);

  constexpr int floatPrec = 2;
  constexpr int floatWidth = 6;
  out.precision(floatPrec);
  out.width(floatWidth);

  float curveto[3][2];
  float curX = 0;
  float curY = 0;

  float* pt = points->GetPointer(0);
  int* code = codes->GetPointer(0);

  double windowHeight = static_cast<double>(this->RenderWindow->GetSize()[1]);

  // These are only used in an assertion, ifdef silences warning on non-debug
  // builds
#ifndef NDEBUG
  float* ptBegin = pt;
  int* codeBegin = code;
#endif

  if (!label.empty())
  {
    out << "<!-- " << label << " -->" << endl;
  }

  int* codeEnd = code + codes->GetNumberOfTuples();
  out << "<g transform=\"" << endl
      << "     translate(" << windowPos[0] << " " << windowHeight - windowPos[1] << ")" << endl;
  if (scale)
  {
    out << "     scale(" << scale[0] << " " << -scale[1] << ")" << endl;
  }
  else
  {
    out << "     scale(1.0 -1.0)" << endl;
  }
  out << "     rotate(" << rotateAngle << ")\"" << endl;
  if (strokeWidth > 1e-5)
  {
    out << "   fill=\"none\"" << endl
        << "   stroke-width=\"" << strokeWidth << "\"" << endl
        << "   stroke=\"rgb(" << std::setprecision(0) << static_cast<int>(rgba[0]) << ","