New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/coding/tesselator_decl.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "base/assert.hpp"
+
+#include <cstdint>
+
+namespace tesselator
+{
+// Edge of graph, built from triangles list.
+struct Edge
+{
+  int m_p[2];        // indexes of connected triangles (0 -> 1)
+  uint64_t m_delta;  // delta of 1 - triangle from 0 - triangle
+
+  // intersected rib of 0 - triangle:
+  // - -1 - uninitialized or root edge
+  // -  0 - this edge intersects 1-2 rib;
+  // -  1 - this edge intersects 2-0 rib;
+  int8_t m_side;
+
+  Edge(int from, int to, uint64_t delta, char side) : m_delta(delta), m_side(side)
+  {
+    m_p[0] = from;
+    m_p[1] = to;
+  }
+};
+}  // namespace tesselator