Merge branch 'feature/direction-export-ctype' into 'master'

[geom][direction] export ctype

See merge request tools/frackit!162

frackit/geometry/direction.hh

@@ -55,6 +55,9 @@ public:
     //! export underlying vector type
     using Vector = typename Frackit::Vector<CT, 1>;
 
+    //! export type used for coordinates
+    using ctype = CT;
+
     //! export dimensionality
     static constexpr int myDimension() { return 1; };
     static constexpr int worldDimension() { return 1; };
@@ -111,6 +114,9 @@ public:
     //! export underlying vector type
     using Vector = typename Frackit::Vector<CT, 2>;
 
+    //! export type used for coordinates
+    using ctype = CT;
+
     //! export dimensionality
     static constexpr int myDimension() { return 1; };
     static constexpr int worldDimension() { return 2; };
@@ -171,6 +177,9 @@ public:
     //! export underlying vector type
     using Vector = typename Frackit::Vector<CT, 3>;
 
+    //! export type used for coordinates
+    using ctype = CT;
+
     //! export dimensionality
     static constexpr int myDimension() { return 1; };
     static constexpr int worldDimension() { return 3; };