fix(poly): working on 3D polytrope

not working yet

src/poly/utils/public/polyMFEMUtils.h

@@ -3,6 +3,7 @@
 
 #include "mfem.hpp"
 #include <string>
+#include "config.h"
 
 
 
@@ -22,6 +23,7 @@ namespace polyMFEMUtils {
    */
   class NonlinearPowerIntegrator: public mfem::NonlinearFormIntegrator {
   private: 
+    Config& config = Config::getInstance();
     mfem::Coefficient &coeff_;
     double polytropicIndex;
   public:
@@ -187,19 +189,30 @@ namespace polyMFEMUtils {
 
   class AugmentedOperator : public mfem::Operator {
     private:
+      Config& config = Config::getInstance();
       mfem::NonlinearForm &nfl;
       mfem::LinearForm &C;
+      double C_val;
       int lambdaDofOffset;
       mutable mfem::SparseMatrix *lastJacobian = nullptr;
 
     public:
-      AugmentedOperator(mfem::NonlinearForm &nfl_, mfem::LinearForm &C_, int lambdaDofOffset_);
+      AugmentedOperator(mfem::NonlinearForm &nfl_, mfem::LinearForm &C_, int lambdaDofOffset_, double C_val_);
       ~AugmentedOperator();
 
       virtual void Mult(const mfem::Vector &x, mfem::Vector &y) const override;
 
       virtual mfem::Operator &GetGradient(const mfem::Vector &x) const override;
   };
+
+  /**
+   * @brief Calculates the Gaussian integral.
+   * 
+   * @param mesh The mesh.
+   * @param gaussianCoeff The Gaussian coefficient.
+   * @return The Gaussian integral.
+   */
+  double calculateGaussianIntegral(mfem::Mesh &mesh, polyMFEMUtils::GaussianCoefficient &gaussianCoeff);
 } // namespace polyMFEMUtils
 
 #endif // POLYMFEMUTILS_H