More module implementation partition units

1 files changed, 42 insertions, 0 deletions

diff --git a/server/src/geo.cpp b/server/src/geo.cpp
new file mode 100644
index 0000000..1776f3c
--- /dev/null
+++ b/server/src/geo.cpp
@@ -0,0 +1,42 @@
+module;
+
+#include <boost/geometry.hpp>
+
+module routemon:geo$impl;
+
+import :geo;
+
+namespace routemon::geo {
+
+auto split_linestring_with_overlap_segments(
+    linestring const& ls, double max_split_distance_m,
+    std::vector<linestring>& append_to) -> void
+{
+  if (bgeo::is_empty(ls))
+    return;
+
+  auto current_ls = linestring{};
+  auto current_ls_length = 0.0;
+  auto previous = std::optional<point>{};
+  bgeo::for_each_point(
+      ls,
+      [&](point p) -> void
+      {
+        bgeo::append(current_ls, p);
+        if (previous)
+        {
+          auto d = bgeo::distance(*previous, p, vincenty_strategy());
+          current_ls_length += d;
+          if (current_ls_length > max_split_distance_m)
+          {
+            append_to.push_back(std::move(current_ls));
+            current_ls = linestring{*previous, p};
+            current_ls_length = d;
+          }
+        }
+        previous = p;
+      });
+  append_to.emplace_back(std::move(current_ls));
+}
+
+} // namespace routemon::geo