Repo created

libs/geometry/region2d/binary_operators.cpp

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+#include "geometry/region2d/binary_operators.hpp"
+#include "geometry/region2d/boost_concept.hpp"
+
+namespace m2
+{
+void SpliceRegions(std::vector<RegionI> & src, std::vector<RegionI> & res)
+{
+  for (size_t i = 0; i < src.size(); ++i)
+  {
+    res.push_back(RegionI());
+    res.back().Swap(src[i]);
+  }
+}
+
+void IntersectRegions(RegionI const & r1, RegionI const & r2, MultiRegionI & res)
+{
+  MultiRegionI local;
+  using namespace boost::polygon::operators;
+  local += (r1 * r2);
+  SpliceRegions(local, res);
+}
+
+MultiRegionI IntersectRegions(RegionI const & r1, MultiRegionI const & r2)
+{
+  MultiRegionI local;
+  using namespace boost::polygon::operators;
+  local += (r1 * r2);
+  return local;
+}
+
+void DiffRegions(RegionI const & r1, RegionI const & r2, MultiRegionI & res)
+{
+  MultiRegionI local;
+  using namespace boost::polygon::operators;
+  local += boost::polygon::operators::operator-(r1, r2);
+  SpliceRegions(local, res);
+}
+
+void AddRegion(RegionI const & r, MultiRegionI & res)
+{
+  using namespace boost::polygon::operators;
+  res += r;
+}
+
+uint64_t Area(MultiRegionI const & rgn)
+{
+  uint64_t area = 0;
+  for (auto const & r : rgn)
+    area += r.CalculateArea();
+  return area;
+}
+}  // namespace m2