Integrate Refactor solver sources and dual MSVC CMake builds

src/fesa/loads/shell_surface_pressure.cpp

@@ -6,10 +6,13 @@
 #include <cstddef>
 #include <string>
 #include <utility>
+#include "math/vector3_operations.h"
 
 namespace fesa {
 namespace {
 
+using math_internal::WeightedSum;
+
 constexpr std::size_t kNodeCount = 4U;
 constexpr std::size_t kDofsPerNode = 6U;
 constexpr std::size_t kDofCount = kNodeCount * kDofsPerNode;
@@ -54,16 +57,6 @@ ShapeData ShapeAt(const double xi, const double eta) noexcept {
             0.25 * (1.0 + xi), 0.25 * (1.0 - xi)}}};
 }
 
-/// @brief Evaluates one tangent or area vector from shape coefficients.
-Vector3 WeightedSum(const std::array<double, kNodeCount>& weights,
-                    const std::array<Vector3, kNodeCount>& coordinates) {
-  Vector3 result{};
-  for (std::size_t node = 0U; node < kNodeCount; ++node) {
-    result = result + weights[node] * coordinates[node];
-  }
-  return result;
-}
-
 /// @brief Evaluates finite bilinear surface data at one natural point.
 bool EvaluateGeometry(const std::array<Vector3, kNodeCount>& coordinates,
                       const double xi, const double eta,