ffc_22.h

Dolfin provide a high-performance linear algebra library

    for (unsigned int row = 1; row < num_derivatives; row++)
    {
      for (unsigned int num = 0; num < row; num++)
      {
        for (unsigned int col = n-1; col+1 > 0; col--)
        {
          if (combinations[row][col] + 1 > 2)
            combinations[row][col] = 0;
          else
          {
            combinations[row][col] += 1;
            break;
          }
        }
      }
    }
    
    // Compute inverse of Jacobian, components are scaled because of difference in FFC/FIAT reference elements
    const double Jinv[3][3] ={{2*d00 / detJ, 2*d10 / detJ, 2*d20 / detJ}, {2*d01 / detJ, 2*d11 / detJ, 2*d21 / detJ}, {2*d02 / detJ, 2*d12 / detJ, 2*d22 / detJ}};
    
    // Declare transformation matrix
    // Declare pointer to two dimensional array and initialise
    double **transform = new double *[num_derivatives];
        
    for (unsigned int j = 0; j < num_derivatives; j++)
    {
      transform[j] = new double [num_derivatives];
      for (unsigned int k = 0; k < num_derivatives; k++)
        transform[j][k] = 1;
    }
    
    // Construct transformation matrix
    for (unsigned int row = 0; row < num_derivatives; row++)
    {
      for (unsigned int col = 0; col < num_derivatives; col++)
      {
        for (unsigned int k = 0; k < n; k++)
          transform[row][col] *= Jinv[combinations[col][k]][combinations[row][k]];
      }
    }
    
    // Reset values
    for (unsigned int j = 0; j < 3*num_derivatives; j++)
      values[j] = 0;
    
    if (0 <= i and i <= 0)
    {
      // Map degree of freedom to element degree of freedom
      const unsigned int dof = i;
    
      // Generate scalings
      const double scalings_y_0 = 1;
      const double scalings_z_0 = 1;
    
      // Compute psitilde_a
      const double psitilde_a_0 = 1;
    
      // Compute psitilde_bs
      const double psitilde_bs_0_0 = 1;
    
      // Compute psitilde_cs
      const double psitilde_cs_00_0 = 1;
    
      // Compute basisvalues
      const double basisvalue0 = 0.866025403784439*psitilde_a_0*scalings_y_0*psitilde_bs_0_0*scalings_z_0*psitilde_cs_00_0;
    
      // Table(s) of coefficients
      const static double coefficients0[1][1] =   \
      {{1.15470053837925}};
    
      // Interesting (new) part
      // Tables of derivatives of the polynomial base (transpose)
      const static double dmats0[1][1] =   \
      {{0}};
    
      const static double dmats1[1][1] =   \
      {{0}};
    
      const static double dmats2[1][1] =   \
      {{0}};
    
      // Compute reference derivatives
      // Declare pointer to array of derivatives on FIAT element
      double *derivatives = new double [num_derivatives];
    
      // Declare coefficients
      double coeff0_0 = 0;
    
      // Declare new coefficients
      double new_coeff0_0 = 0;
    
      // Loop possible derivatives
      for (unsigned int deriv_num = 0; deriv_num < num_derivatives; deriv_num++)
      {
        // Get values from coefficients array
        new_coeff0_0 = coefficients0[dof][0];
    
        // Loop derivative order
        for (unsigned int j = 0; j < n; j++)
        {
          // Update old coefficients
          coeff0_0 = new_coeff0_0;
    
          if(combinations[deriv_num][j] == 0)
          {
            new_coeff0_0 = coeff0_0*dmats0[0][0];
          }
          if(combinations[deriv_num][j] == 1)
          {
            new_coeff0_0 = coeff0_0*dmats1[0][0];
          }
          if(combinations[deriv_num][j] == 2)
          {
            new_coeff0_0 = coeff0_0*dmats2[0][0];
          }
    
        }
        // Compute derivatives on reference element as dot product of coefficients and basisvalues
        derivatives[deriv_num] = new_coeff0_0*basisvalue0;
      }
    
      // Transform derivatives back to physical element
      for (unsigned int row = 0; row < num_derivatives; row++)
      {
        for (unsigned int col = 0; col < num_derivatives; col++)
        {
          values[row] += transform[row][col]*derivatives[col];
        }
      }
      // Delete pointer to array of derivatives on FIAT element
      delete [] derivatives;
    
      // Delete pointer to array of combinations of derivatives
      delete [] combinations;
    
    }
    
    if (1 <= i and i <= 1)
    {
      // Map degree of freedom to element degree of freedom
      const unsigned int dof = i - 1;
    
      // Generate scalings
      const double scalings_y_0 = 1;
      const double scalings_z_0 = 1;
    
      // Compute psitilde_a
      const double psitilde_a_0 = 1;
    
      // Compute psitilde_bs
      const double psitilde_bs_0_0 = 1;
    
      // Compute psitilde_cs
      const double psitilde_cs_00_0 = 1;
    
      // Compute basisvalues
      const double basisvalue0 = 0.866025403784439*psitilde_a_0*scalings_y_0*psitilde_bs_0_0*scalings_z_0*psitilde_cs_00_0;
    
      // Table(s) of coefficients
      const static double coefficients0[1][1] =   \
      {{1.15470053837925}};
    
      // Interesting (new) part
      // Tables of derivatives of the polynomial base (transpose)
      const static double dmats0[1][1] =   \
      {{0}};
    
      const static double dmats1[1][1] =   \
      {{0}};
    
      const static double dmats2[1][1] =   \
      {{0}};
    
      // Compute reference derivatives
      // Declare pointer to array of derivatives on FIAT element
      double *derivatives = new double [num_derivatives];
    
      // Declare coefficients
      double coeff0_0 = 0;
    
      // Declare new coefficients
      double new_coeff0_0 = 0;
    
      // Loop possible derivatives
      for (unsigned int deriv_num = 0; deriv_num < num_derivatives; deriv_num++)
      {
        // Get values from coefficients array
        new_coeff0_0 = coefficients0[dof][0];
    
        // Loop derivative order
        for (unsigned int j = 0; j < n; j++)
        {
          // Update old coefficients
          coeff0_0 = new_coeff0_0;
    
          if(combinations[deriv_num][j] == 0)
          {
            new_coeff0_0 = coeff0_0*dmats0[0][0];
          }
          if(combinations[deriv_num][j] == 1)
          {
            new_coeff0_0 = coeff0_0*dmats1[0][0];
          }
          if(combinations[deriv_num][j] == 2)
          {
            new_coeff0_0 = coeff0_0*dmats2[0][0];
          }
    
        }
        // Compute derivatives on reference element as dot product of coefficients and basisvalues
        derivatives[deriv_num] = new_coeff0_0*basisvalue0;
      }
    
      // Transform derivatives back to physical element
      for (unsigned int row = 0; row < num_derivatives; row++)
      {
        for (unsigned int col = 0; col < num_derivatives; col++)
        {
          values[num_derivatives + row] += transform[row][col]*derivatives[col];
        }
      }
      // Delete pointer to array of derivatives on FIAT element
      delete [] derivatives;
    
      // Delete pointer to array of combinations of derivatives
      delete [] combinations;
    
    }
    
    if (2 <= i and i <= 2)
    {
      // Map degree of freedom to element degree of freedom
      const unsigned int dof = i - 2;
    
      // Generate scalings
      const double scalings_y_0 = 1;
      const double scalings_z_0 = 1;
    
      // Compute psitilde_a
      const double psitilde_a_0 = 1;
    
      // Compute psitilde_bs
      const double psitilde_bs_0_0 = 1;
    
      // Compute psitilde_cs
      const double psitilde_cs_00_0 = 1;
    
      // Compute basisvalues
      const double basisvalue0 = 0.866025403784439*psitilde_a_0*scalings_y_0*psitilde_bs_0_0*scalings_z_0*psitilde_cs_00_0;
    
      // Table(s) of coefficients
      const static double coefficients0[1][1] =   \
      {{1.15470053837925}};
    
      // Interesting (new) part
      // Tables of derivatives of the polynomial base (transpose)
      const static double dmats0[1][1] =   \
      {{0}};
    
      const static double dmats1[1][1] =   \
      {{0}};
    
      const static double dmats2[1][1] =   \
      {{0}};
    
      // Compute reference derivatives
      // Declare pointer to array of derivatives on FIAT element
      double *derivatives = new double [num_derivatives];
    
      // Declare coefficients
      double coeff0_0 = 0;
    
      // Declare new coefficients
      double new_coeff0_0 = 0;
    
      // Loop possible derivatives
      for (unsigned int deriv_num = 0; deriv_num < num_derivatives; deriv_num++)
      {
        // Get values from coefficients array
        new_coeff0_0 = coefficients0[dof][0];
    
        // Loop derivative order
        for (unsigned int j = 0; j < n; j++)
        {
          // Update old coefficients
          coeff0_0 = new_coeff0_0;
    
          if(combinations[deriv_num][j] == 0)
          {
            new_coeff0_0 = coeff0_0*dmats0[0][0];
          }
          if(combinations[deriv_num][j] == 1)
          {
            new_coeff0_0 = coeff0_0*dmats1[0][0];
          }
          if(combinations[deriv_num][j] == 2)
          {
            new_coeff0_0 = coeff0_0*dmats2[0][0];
          }
    
        }
        // Compute derivatives on reference element as dot product of coefficients and basisvalues
        derivatives[deriv_num] = new_coeff0_0*basisvalue0;
      }
    
      // Transform derivatives back to physical element
      for (unsigned int row = 0; row < num_derivatives; row++)
      {
        for (unsigned int col = 0; col < num_derivatives; col++)
        {
          values[2*num_derivatives + row] += transform[row][col]*derivatives[col];
        }
      }
      // Delete pointer to array of derivatives on FIAT element
      delete [] derivatives;
    
      // Delete pointer to array of combinations of derivatives
      delete [] combinations;
    
    }
    
  }

  /// Evaluate linear functional for dof i on the function f
  virtual double evaluate_dof(unsigned int i,
                              const ufc::function& f,
                              const ufc::cell& c) const
  {
    double values[3];
    double coordinates[3];
    
    // Nodal coordinates on reference cell
    static double X[3][3] = {{0.25, 0.25, 0.25}, {0.25, 0.25, 0.25}, {0.25, 0.25, 0.25}};
    
    // Components for each dof
    static unsigned int components[3] = {0, 1, 2};
    
    // Extract vertex coordinates
    const double * const * x = c.coordinates;
    
    // Evaluate basis functions for affine mapping
    const double w0 = 1.0 - X[i][0] - X[i][1] - X[i][2];
    const double w1 = X[i][0];
    const double w2 = X[i][1];
    const double w3 = X[i][2];
    
    // Compute affine mapping x = F(X)
    coordinates[0] = w0*x[0][0] + w1*x[1][0] + w2*x[2][0] + w3*x[3][0];
    coordinates[1] = w0*x[0][1] + w1*x[1][1] + w2*x[2][1] + w3*x[3][1];
    coordinates[2] = w0*x[0][2] + w1*x[1][2] + w2*x[2][2] + w3*x[3][2];
    
    // Evaluate function at coordinates
    f.evaluate(values, coordinates, c);
    
    // Pick component for evaluation
    return values[components[i]];
  }

  /// Interpolate vertex values from dof values
  virtual void interpolate_vertex_values(double* vertex_values,
                                         const double* dof_values,
                                         const ufc::cell& c) const
  {
    // Evaluate at vertices and use affine mapping
    vertex_values[0] = dof_values[0];
    vertex_values[1] = dof_values[0];
    vertex_values[2] = dof_values[0];
    vertex_values[3] = dof_values[0];
    // Evaluate at vertices and use affine mapping
    vertex_values[4] = dof_values[1];
    vertex_values[5] = dof_values[1];
    vertex_values[6] = dof_values[1];
    vertex_values[7] = dof_values[1];
    // Evaluate at vertices and use affine mapping
    vertex_values[8] = dof_values[2];
    vertex_values[9] = dof_values[2];
    vertex_values[10] = dof_values[2];
    vertex_values[11] = dof_values[2];
  }

  /// Return the number of sub elements (for a mixed element)
  virtual unsigned int num_sub_elements() const
  {
    return 3;
  }

  /// Create a new finite element for sub element i (for a mixed element)
  virtual ufc::finite_element* create_sub_element(unsigned int i) const
  {
    switch ( i )
    {
    cas