Merge branch 'feature/add_unary_minus_to_vector' into 'master'

Add unary minus operator to vector

See merge request eclipse/simopenpass/scenario_api!21

MantleAPI/include/MantleAPI/Common/vector.h

@@ -24,11 +24,23 @@ namespace mantle_api
 template <typename T, class = typename std::enable_if_t<units::traits::is_unit_t<T>::value>>
 struct Vec3
 {
+  Vec3() = default;
+
+  Vec3(T x_in, T y_in, T z_in)
+      : x{x_in}, y{y_in}, z{z_in}
+  {
+  }
+
   T x{0};
   T y{0};
   T z{0};
 
   inline T Length() const { return units::math::sqrt((x * x) + (y * y) + (z * z)); }
+
+  inline Vec3<T> operator-() const noexcept
+  {
+    return {-x, -y, -z};
+  }
 };
 
 template <typename T>