- more fixes

src/cpp/include/zell/io/vtk/ugrid/scalar_data.hpp

@@ -114,6 +114,9 @@ scalar_data<F, Alloc>::scalar_data(
   value_array_(nelement, alloc),
   field_array_(nelement * ncomponent, alloc)
 {
+  for (std::size_t i = 0; i < nelement; ++i) {
+    value_array_[i] = value_type(ncomponent, &field_array_[i * ncomponent]);
+  }
 }
 
 template <typename F, typename Alloc>

src/cpp/include/zell/io/vtk/ugrid/scalar_value.hpp

@@ -56,6 +56,12 @@ private:
   field_type* begin_;
   field_type* end_;
 };
+
+template <typename F>
+scalar_value<F>::scalar_value(std::size_t ncomp, field_type* begin)
+: begin_{begin}, end_{begin + ncomp}
+{
+}
 } // namespace zell::io::vtk::ugrid
 
 #endif // ZELL_IO_VTK_UGRID_SCALAR_VALUE_HPP