Repo created

generator/feature_helpers.cpp

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+#include "generator/feature_helpers.hpp"
+#include "generator/feature_builder.hpp"
+
+#include "indexer/feature_visibility.hpp"
+
+#include "base/stl_helpers.hpp"
+
+#include <algorithm>
+
+namespace feature
+{
+CalculateMidPoints::CalculateMidPoints()
+{
+  m_minDrawableScaleFn = [](FeatureBuilder const & fb)
+  { return GetMinDrawableScale(fb.GetTypesHolder(), fb.GetLimitRect()); };
+}
+
+void CalculateMidPoints::operator()(FeatureBuilder const & ft, uint64_t pos)
+{
+  // Reset state.
+  m_midLoc = m2::PointD::Zero();
+  m_locCount = 0;
+
+  ft.ForEachPoint(*this);
+  CHECK_GREATER(m_locCount, 0, ());
+  m_midLoc = m_midLoc / m_locCount;
+
+  uint64_t const pointAsInt64 = PointToInt64Obsolete(m_midLoc, m_coordBits);
+  int const minScale = m_minDrawableScaleFn(ft);
+
+  /// May be invisible if it's small area object with [0-9] scales.
+  /// @todo Probably, we need to keep that objects if 9 scale (as we do in 17 scale).
+  if (minScale != -1)
+  {
+    uint64_t const order = (static_cast<uint64_t>(minScale) << 59) | (pointAsInt64 >> 5);
+    m_vec.emplace_back(order, pos);
+  }
+}
+
+bool CalculateMidPoints::operator()(m2::PointD const & p)
+{
+  m_midLoc += p;
+  m_midAll += p;
+  ++m_locCount;
+  ++m_allCount;
+  return true;
+}
+
+m2::PointD CalculateMidPoints::GetCenter() const
+{
+  // Possible in unit tests.
+  if (m_allCount == 0)
+    return {0, 0};
+
+  return m_midAll / m_allCount;
+}
+
+void CalculateMidPoints::Sort()
+{
+  std::sort(m_vec.begin(), m_vec.end(), base::LessBy(&CellAndOffset::first));
+}
+}  // namespace feature