# include <cstdlib>
# include <iostream>
# include <fstream>
# include <iomanip>
# include <cmath>
# include <ctime>

using namespace std;

# include "tetrahedron_nco_rule.hpp"

//****************************************************************************80

double r8mat_det_4d ( double a[] )

//****************************************************************************80
//
//  Purpose:
//
//    R8MAT_DET_4D computes the determinant of a 4 by 4 R8MAT.
//
//  Discussion:
//
//    An R8MAT is a doubly dimensioned array of double precision values, which
//    may be stored as a vector in column-major order.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    10 September 2003
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    Input, double A[4*4], the matrix whose determinant is desired.
//
//    Output, double R8MAT_DET_4D, the determinant of the matrix.
//
{
  double det;

  det =
      a[0+0*4] * (
          a[1+1*4] * ( a[2+2*4] * a[3+3*4] - a[2+3*4] * a[3+2*4] )
        - a[1+2*4] * ( a[2+1*4] * a[3+3*4] - a[2+3*4] * a[3+1*4] )
        + a[1+3*4] * ( a[2+1*4] * a[3+2*4] - a[2+2*4] * a[3+1*4] ) )
    - a[0+1*4] * (
          a[1+0*4] * ( a[2+2*4] * a[3+3*4] - a[2+3*4] * a[3+2*4] )
        - a[1+2*4] * ( a[2+0*4] * a[3+3*4] - a[2+3*4] * a[3+0*4] )
        + a[1+3*4] * ( a[2+0*4] * a[3+2*4] - a[2+2*4] * a[3+0*4] ) )
    + a[0+2*4] * (
          a[1+0*4] * ( a[2+1*4] * a[3+3*4] - a[2+3*4] * a[3+1*4] )
        - a[1+1*4] * ( a[2+0*4] * a[3+3*4] - a[2+3*4] * a[3+0*4] )
        + a[1+3*4] * ( a[2+0*4] * a[3+1*4] - a[2+1*4] * a[3+0*4] ) )
    - a[0+3*4] * (
          a[1+0*4] * ( a[2+1*4] * a[3+2*4] - a[2+2*4] * a[3+1*4] )
        - a[1+1*4] * ( a[2+0*4] * a[3+2*4] - a[2+2*4] * a[3+0*4] )
        + a[1+2*4] * ( a[2+0*4] * a[3+1*4] - a[2+1*4] * a[3+0*4] ) );

  return det;
}
//****************************************************************************80

void reference_to_physical_t4 ( double t[], int n, double ref[], double phy[] )

//****************************************************************************80
//
//  Purpose:
//
//    REFERENCE_TO_PHYSICAL_T4 maps T4 reference points to physical points.
//
//  Discussion:
//
//    Given the vertices of an order 4 physical tetrahedron and a point
//    (R,S,T) in the reference tetrahedron, the routine computes the value
//    of the corresponding image point (X,Y,Z) in physical space.
//
//    This routine will also be correct for an order 10 tetrahedron,
//    if the mapping between reference and physical space
//    is linear.  This implies, in particular, that the sides of the
//    image tetrahedron are straight, the faces are flat, and 
//    the "midside" nodes in the physical tetrahedron are
//    halfway along the edges of the physical tetrahedron.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    Input, double T[3*4], the coordinates of the vertices.
//    The vertices are assumed to be the images of (0,0,0), (1,0,0),
//    (0,1,0) and (0,0,1) respectively.
//
//    Input, int N, the number of objects to transform.
//
//    Input, double REF[3*N], points in the reference tetrahedron.
//
//    Output, double PHY[3*N], corresponding points in the
//    physical tetrahedron.
//
{
  int i;
  int j;

  for ( i = 0; i < 3; i++ )
  {
    for ( j = 0; j < n; j++ )
    {
      phy[i+j*3] = t[i+0*3] * ( 1.0 - ref[0+j*3] - ref[1+j*3] - ref[2+j*3] ) 
                 + t[i+1*3] *       + ref[0+j*3] 
                 + t[i+2*3] *                    + ref[1+j*3]                  
                 + t[i+3*3] *                                 + ref[2+j*3];
    }
  }

  return;
}
//****************************************************************************80

int tetrahedron_nco_degree ( int rule )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_DEGREE: degree of an NCO rule for the tetrahedron.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Output, int TETRAHEDRON_NCO_DEGREE, the polynomial degree of exactness of
//    the rule.
//
{
  int degree;

  if ( 1 <= rule && rule <= 7 )
  {
    degree = rule - 1;
  }
  else
  {
    degree = -1;
    cout << "\n";
    cout << "TETRAHEDRON_NCO_DEGREE - Fatal error!\n";
    cout << "  Illegal RULE = " << rule << "\n";
    exit ( 1 );
  }

  return degree;
}
//****************************************************************************80

int tetrahedron_nco_order_num ( int rule )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_ORDER_NUM: order of an NCO rule for the tetrahedron.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Output, int TETRAHEDRON_NCO_ORDER_NUM, the order (number of points) 
//    of the rule.
//
{
  int order;
  int order_num;
  int *suborder;
  int suborder_num;

  suborder_num = tetrahedron_nco_suborder_num ( rule );

  suborder = tetrahedron_nco_suborder ( rule, suborder_num );

  order_num = 0;
  for ( order = 0; order < suborder_num; order++ )
  {
    order_num = order_num + suborder[order];
  }

  delete [] suborder;

  return order_num;
}
//****************************************************************************80

void tetrahedron_nco_rule ( int rule, int order_num, double xyz[], double w[] )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_RULE returns the points and weights of an NCO rule.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Input, int ORDER_NUM, the order (number of points) of the rule.
//
//    Output, double XYZ[3*ORDER_NUM], the points of the rule.
//
//    Output, double W[ORDER_NUM], the weights of the rule.
//
{
  int o;
  int s;
  int *suborder;
  int suborder_num;
  double *suborder_w;
  double *suborder_xyz;
//
//  Get the suborder information.
//
  suborder_num = tetrahedron_nco_suborder_num ( rule );

  suborder_xyz = new double[4*suborder_num];
  suborder_w = new double[suborder_num];

  suborder = tetrahedron_nco_suborder ( rule, suborder_num );

  tetrahedron_nco_subrule ( rule, suborder_num, suborder_xyz, suborder_w );
//
//  Expand the suborder information to a full order rule.
//
  o = 0;

  for ( s = 0; s < suborder_num; s++ )
  {
    if ( suborder[s] == 1 )
    {
      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
    }
//
//  Fourfold symmetry on (A,A,A,B)
//
//    123 AAA
//    124 AAB
//    142 ABA
//    412 BAA
//
    else if ( suborder[s] == 4 )
    {
      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
    }
//
//  Sixfold symmetry on (A,A,B,B):
//
//    123 (A,A,B)
//    132 (A,B,A),
//    134 (A,B,B)
//    312 (B,A,A)
//    314 (B,A,B)
//    341 (B,B,A)
//
    else if ( suborder[s] == 6 )
    {
      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
    }
//
//  Twelvefold symmetry on (A,A,B,C):
//
//    123 (A,A,B)
//    124 (A,A,C)
//    132 (A,B,A)
//    134 (A,B,C)
//    142 (A,C,A)
//    143 (A,C,B)
//    312 (B,A,A)
//    314 (B,A,C)
//    341 (B,C,A)
//    412 (C,A,A)
//    413 (C,A,B)
//    431 (C,B,A)
//
    else if ( suborder[s] == 12 )
    {
      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
 
      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
    }
//
//  24 fold symmetry on (A,B,C,D):
//
//    123 (A,B,C)
//    124 (A,B,D)
//    132 (A,C,B)
//    134 (A,C,D)
//    142 (A,D,B)
//    143 (A,D,C)
//    213 (B,A,C)
//    214 (B,A,D)
//    231 (B,C,A)
//    234 (B,C,D)
//    241 (B,D,A)
//    243 (B,D,C)
//    312 (C,A,B)
//    314 (C,A,D)
//    321 (C,B,A)
//    324 (C,B,D)
//    341 (C,D,A)
//    342 (C,D,B)
//    412 (D,A,B)
//    413 (D,A,C)
//    421 (D,B,A)
//    423 (D,B,C)
//    431 (D,C,A)
//    432 (D,C,B)
//
    else if ( suborder[s] == 24 )
    {
      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[0+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[4+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[1+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[3+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[2+s*4];
      xyz[1+o*3] = suborder_xyz[3+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[0+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[1+s*4];
      xyz[2+o*3] = suborder_xyz[2+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[0+s*4];
      w[o] = suborder_w[s];
      o = o + 1;

      xyz[0+o*3] = suborder_xyz[3+s*4];
      xyz[1+o*3] = suborder_xyz[2+s*4];
      xyz[2+o*3] = suborder_xyz[1+s*4];
      w[o] = suborder_w[s];
      o = o + 1;
    }
    else
    {
      cout << "\n";
      cout << "TETRAHEDRON_NCO_RULE - Fatal error!\n;";
      cout << "  Illegal SUBORDER(" << s << ") = " << suborder[s] << "\n";
      exit ( 1 );
    }
  }

  delete [] suborder;
  delete [] suborder_xyz;
  delete [] suborder_w;

  return;
}
//****************************************************************************80

int tetrahedron_nco_rule_num ( )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_RULE_NUM returns the number of NCO rules available.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Output, int TETRAHEDRON_NCO_RULE_NUM, the number of rules available.
//
{
  int rule_num;

  rule_num = 7;

  return rule_num;
}
//****************************************************************************80

int *tetrahedron_nco_suborder ( int rule, int suborder_num )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBORDER returns the suborders for an NCO rule.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int TETRAHEDRON_NCO_SUBORDER[SUBORDER_NUM], 
//    the suborders of the rule.
//
{
  int *suborder;

  suborder = new int[suborder_num];

  if ( rule == 1 )
  {
    suborder[0] = 1;
  }
  else if ( rule == 2 )
  {
    suborder[0] = 4;
  }
  else if ( rule == 3 )
  {
    suborder[0] = 4;
    suborder[1] = 6;
  }
  else if ( rule == 4 )
  {
    suborder[0] =  4;
    suborder[1] = 12;
    suborder[2] =  4;
  }
  else if ( rule == 5 )
  {
    suborder[0] =  4;
    suborder[1] = 12;
    suborder[2] =  6;
    suborder[3] = 12;
    suborder[4] =  1;
  }
  else if ( rule == 6 )
  {
    suborder[0] =  4;
    suborder[1] = 12;
    suborder[2] = 12;
    suborder[3] = 12;
    suborder[4] = 12;
    suborder[5] =  4;
  }
  else if ( rule == 7 )
  {
    suborder[0] =  4;
    suborder[1] = 12;
    suborder[2] = 12;
    suborder[3] = 12;
    suborder[4] =  6;
    suborder[5] = 24;
    suborder[6] =  4;
    suborder[7] =  4;
    suborder[8] =  6;
  }
  else
  {
    cout << "\n";
    cout << "TETRAHEDRON_NCO_SUBORDER - Fatal error!\n";
    cout << "  Illegal RULE = " << rule << "\n";
    exit ( 1 );
  }

  return suborder;
}
//****************************************************************************80

int tetrahedron_nco_suborder_num ( int rule )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBORDER_NUM returns the number of suborders for an NCO rule.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Output, int TETRAHEDRON_NCO_SUBORDER_NUM, the number of suborders 
//    of the rule.
//
{
  int suborder_num;

  if ( rule == 1 )
  {
    suborder_num = 1;
  }
  else if ( rule == 2 )
  {
    suborder_num = 1;
  }
  else if ( rule == 3 )
  {
    suborder_num = 2;
  }
  else if ( rule == 4 )
  {
    suborder_num = 3;
  }
  else if ( rule == 5 )
  {
    suborder_num = 5;
  }
  else if ( rule == 6 )
  {
    suborder_num = 6;
  }
  else if ( rule == 7 )
  {
    suborder_num = 9;
  }
  else
  {
    suborder_num = -1;
    cout << "\n";
    cout << "TETRAHEDRON_NCO_SUBORDER_NUM - Fatal error!\n";
    cout << "  Illegal RULE = " << rule << "\n";
    exit ( 1 );
  }

  return suborder_num;
}
//****************************************************************************80

void tetrahedron_nco_subrule ( int rule, int suborder_num, 
  double suborder_xyz[], double suborder_w[] )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE returns a compressed NCO rule.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int RULE, the index of the rule.
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, double SUBORDER_XYZ[4*SUBORDER_NUM],
//    the barycentric coordinates of the abscissas.
//
//    Output, double SUBORDER_W[SUBORDER_NUM], the suborder weights.
//
{
  int i;
  int s;
  int suborder_w_d;
  int *suborder_w_n;
  int suborder_xyz_d;
  int *suborder_xyz_n;

  suborder_xyz_n = new int[4*suborder_num];
  suborder_w_n = new int[suborder_num];

  if ( rule == 1 )
  {
    tetrahedron_nco_subrule_01 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 2 )
  {
    tetrahedron_nco_subrule_02 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 3 )
  {
    tetrahedron_nco_subrule_03 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 4 )
  {
    tetrahedron_nco_subrule_04 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 5 )
  {
    tetrahedron_nco_subrule_05 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 6 )
  {
    tetrahedron_nco_subrule_06 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else if ( rule == 7 )
  {
    tetrahedron_nco_subrule_07 ( suborder_num, suborder_xyz_n, &suborder_xyz_d,
    suborder_w_n, &suborder_w_d );
  }
  else
  {
    cout << "\n";
    cout << "TETRAHEDRON_NCO_SUBRULE - Fatal error!\n";
    cout << "  Illegal RULE = " << rule << "\n";
    exit ( 1 );
  }

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz[i+s*4] =
          ( double ) ( 1 + suborder_xyz_n[i+s*4] ) 
        / ( double ) ( 4 + suborder_xyz_d );
    }
  }
  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w[s] = ( double ) suborder_w_n[s] / ( double ) suborder_w_d;
  }

  delete [] suborder_w_n;
  delete [] suborder_xyz_n;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_01 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_01 returns a compressed NCO rule 1.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_01[4*1] = {
      0, 0, 0, 0
  };
  int suborder_xyz_d_01 = 0;
  int suborder_w_n_01[1] = { 1 };
  int suborder_w_d_01 = 1;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_01[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_01;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_01[s];
  }
  *suborder_w_d = suborder_w_d_01;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_02 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_02 returns a compressed NCO rule 2.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_02[4*1] = {
      0, 0, 0, 1
  };
  int suborder_xyz_d_02 = 1;
  int suborder_w_n_02[1] = { 1 };
  int suborder_w_d_02 = 4;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_02[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_02;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_02[s];
  }
  *suborder_w_d = suborder_w_d_02;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_03 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_03 returns a compressed NCO rule 3.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_03[4*2] = {
      0, 0, 0, 2,
      1, 1, 0, 0
  };
  int suborder_xyz_d_03 = 2;
  int suborder_w_n_03[2] = { 11, -4 };
  int suborder_w_d_03 = 20;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_03[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_03;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_03[s];
  }
  *suborder_w_d = suborder_w_d_03;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_04 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_04 returns a compressed NCO rule 4.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_04[4*3] = {
      0, 0, 0, 3,
      0, 0, 1, 2,
      1, 1, 1, 0
  };
  int suborder_xyz_d_04 = 3;
  int suborder_w_n_04[3] = { 20, 13, -29 };
  int suborder_w_d_04 = 120;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_04[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_04;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_04[s];
  }
  *suborder_w_d = suborder_w_d_04;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_05 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_05 returns a compressed NCO rule 5.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_05[4*5] = {
      0, 0, 0, 4,  
      0, 0, 3, 1,  
      2, 2, 0, 0,  
      1, 1, 0, 2,  
      1, 1, 1, 1   
  };
  int suborder_xyz_d_05 = 4;
  int suborder_w_n_05[5] = { 79, -68, 142, -12, 2 };
  int suborder_w_d_05 = 210;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_05[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_05;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_05[s];
  }
  *suborder_w_d = suborder_w_d_05;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_06 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_06 returns a compressed NCO rule 6.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_06[4*6] = {
      0, 0, 0, 5,  
      0, 0, 4, 1,  
      0, 0, 3, 2,  
      1, 1, 0, 3,  
      2, 2, 1, 0,  
      1, 1, 1, 2   
  };
  int suborder_xyz_d_06 = 5;
  int suborder_w_n_06[6] = { 277, 97, 223, -713, 505, -53 };
  int suborder_w_d_06 = 2240;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_06[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_06;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_06[s];
  }
  *suborder_w_d = suborder_w_d_06;

  return;
}
//****************************************************************************80

void tetrahedron_nco_subrule_07 ( int suborder_num, int suborder_xyz_n[],
  int *suborder_xyz_d, int suborder_w_n[], int *suborder_w_d )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_NCO_SUBRULE_07 returns a compressed NCO rule 7.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    31 January 2007
//
//  Author:
//
//    John Burkardt
//
//  Reference:
//
//    Peter Silvester,
//    Symmetric Quadrature Formulae for Simplexes,
//    Mathematics of Computation,
//    Volume 24, Number 109, January 1970, pages 95-100.
//
//  Parameters:
//
//    Input, int SUBORDER_NUM, the number of suborders of the rule.
//
//    Output, int SUBORDER_XYZ_N[4*SUBORDER_NUM],
//    the numerators of the barycentric coordinates of the abscissas.
//
//    Output, int *SUBORDER_XYZ_D,
//    the denominator of the barycentric coordinates of the abscissas.
//
//    Output, int SUBORDER_W_N[SUBORDER_NUM], 
//    the numerator of the suborder weights.
//
//    Output, int SUBORDER_W_D, 
//    the denominator of the suborder weights.
//
{
  int i;
  int s;
  int suborder_xyz_n_07[4*9] = {
      0, 0, 0, 6,  
      0, 0, 5, 1,  
      0, 0, 4, 2,  
      1, 1, 0, 4,  
      3, 3, 0, 0,  
      3, 2, 1, 0,  
      1, 1, 1, 3,  
      2, 2, 2, 0,  
      2, 2, 1, 1   
  };
  int suborder_xyz_d_07 = 6;
  int suborder_w_n_07[9] = { 430, -587, 1327, 187, -1298, -398, 22, 1537, -38 };
  int suborder_w_d_07 = 1512;

  for ( s = 0; s < suborder_num; s++ )
  {
    for ( i = 0; i < 4; i++ )
    {
      suborder_xyz_n[i+s*4] = suborder_xyz_n_07[i+s*4];
    }
  }
  *suborder_xyz_d = suborder_xyz_d_07;

  for ( s = 0; s < suborder_num; s++ )
  {
    suborder_w_n[s] = suborder_w_n_07[s];
  }
  *suborder_w_d = suborder_w_d_07;

  return;
}
//****************************************************************************80

double tetrahedron_volume ( double tetra[3*4] )

//****************************************************************************80
//
//  Purpose:
//
//    TETRAHEDRON_VOLUME  computes the volume of a tetrahedron.
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    06 August 2005
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    Input, double TETRA[3*4], the vertices of the tetrahedron.
//
//    Output, double TETRAHEDRON_VOLUME, the volume of the tetrahedron.
//
{
  double a[4*4];
  int i;
  int j;
  double volume;

  for ( i = 0; i < 3; i++ )
  {
    for ( j = 0; j < 4; j++ )
    { 
      a[i+j*4] = tetra[i+j*3];
    }
  }

  i = 3;
  for ( j = 0; j < 4; j++ )
  {
    a[i+j*4] = 1.0;
  }

  volume = fabs ( r8mat_det_4d ( a ) ) / 6.0;

  return volume;
}
//****************************************************************************80

void timestamp ( )

//****************************************************************************80
//
//  Purpose:
//
//    TIMESTAMP prints the current YMDHMS date as a time stamp.
//
//  Example:
//
//    31 May 2001 09:45:54 AM
//
//  Licensing:
//
//    This code is distributed under the MIT license. 
//
//  Modified:
//
//    24 September 2003
//
//  Author:
//
//    John Burkardt
//
//  Parameters:
//
//    None
//
{
# define TIME_SIZE 40

  static char time_buffer[TIME_SIZE];
  const struct tm *tm;
  time_t now;

  now = time ( NULL );
  tm = localtime ( &now );

  strftime ( time_buffer, TIME_SIZE, "%d %B %Y %I:%M:%S %p", tm );

  cout << time_buffer << "\n";

  return;
# undef TIME_SIZE
}