1 files changed, 43 insertions, 0 deletions
diff --git a/lib/include/wolff/models/height.hpp b/lib/include/wolff/models/height.hpp
new file mode 100644
index 0000000..bd0ceb6
--- /dev/null
+++ b/lib/include/wolff/models/height.hpp
@@ -0,0 +1,43 @@
+
+#pragma once
+
+#include <cmath>
+#include <wolff/types.h>
+
+template <class T>
+struct height_t {
+  T x;
+
+  height_t() : x(0) {}
+  height_t(T x) : x(x) {}
+
+  typedef T M_t;
+  typedef double F_t;
+
+  inline T operator*(v_t a) const {
+    return x * a;
+  }
+
+  inline double operator*(double a) const {
+    return x * a;
+  }
+
+  inline T operator-(const height_t& h) const {
+    return x - h.x;
+  }
+};
+
+template <class T>
+inline T& operator+=(T& M, const height_t<T> &h) {
+  M += h.x;
+
+  return M;
+}
+
+template <class T>
+inline T& operator-=(T& M, const height_t<T> &h) {
+  M -= h.x;
+
+  return M;
+}
+