Method Update

libs/drape_frontend/path_text_handle.cpp:149–192

}

void PathTextContext::Update(ScreenBase const & screen)
{
  if (m_updated)
    return;
  m_updated = true;

  m_pixel3dSplines.clear();
  m_centerPointIters.clear();
  m_centerGlobalPivots.clear();

  m2::SplineEx pixelSpline(m_globalSpline->GetSize());
  for (auto pos : m_globalSpline->GetPath())
  {
    pos = screen.GtoP(pos);
    if (screen.IsReverseProjection3d(pos))
    {
      if (pixelSpline.GetSize() > 1)
        m_pixel3dSplines.push_back(std::move(pixelSpline));
      pixelSpline.Clear();
      continue;
    }
    AddPointAndRound(pixelSpline, screen.PtoP3d(pos));
  }

  if (pixelSpline.GetSize() > 1)
    m_pixel3dSplines.emplace_back(std::move(pixelSpline));

  if (m_pixel3dSplines.empty())
    return;

  ASSERT_EQUAL(m_globalPivots.size(), m_globalOffsets.size(), ());
  for (auto const & pivot : m_globalPivots)
  {
    m2::PointD const pt2d = screen.GtoP(pivot);
    if (!screen.IsReverseProjection3d(pt2d))
    {
      auto projectionIter = GetProjectedPoint(screen.PtoP3d(pt2d));
      if (!projectionIter.IsAttached())
        continue;
      m_centerPointIters.push_back(projectionIter);
      m_centerGlobalPivots.push_back(pivot);
    }
  }
}

m2::Spline::iterator PathTextContext::GetProjectedPoint(m2::PointD const & pt) const
{