Method CalcDelta

generator/tesselator.cpp:153–166

Calc delta of 'from'->'to' graph edge.

/// Calc delta of 'from'->'to' graph edge.
uint64_t TrianglesInfo::ListInfo::CalcDelta(PointsInfo const & points, Triangle const & from, Triangle const & to) const
{
  std::pair<int, int> const p = CommonEdge(to, from);

  m2::PointU const prediction = coding::PredictPointInTriangle(points.m_max,
                                                               // common edge with 'to'
                                                               points.m_points[from.m_p[(p.second + 1) % 3]],
                                                               points.m_points[from.m_p[(p.second)]],
                                                               // diagonal point of 'from'
                                                               points.m_points[from.m_p[(p.second + 2) % 3]]);

  // delta from prediction to diagonal point of 'to'
  return coding::EncodePointDeltaAsUint(points.m_points[to.m_p[(p.first + 2) % 3]], prediction);
}

template <class TPopOrder>
void TrianglesInfo::ListInfo::MakeTrianglesChainImpl(PointsInfo const & points, TIterator start,