BF_C_T_P1_2D.h

// ***********************************************************************
// P1 element, conforming, 2D
// ***********************************************************************

// base function values
static void C_T_P1_2D_Funct(double xi, double eta, double *values)
{
  values[0]=1-xi-eta;
  values[1]=xi;
  values[2]=eta;
}

// values of the derivatives in xi direction
static void C_T_P1_2D_DeriveXi(double xi, double eta, double *values)
{
  values[0]=-1;
  values[1]=1;
  values[2]=0;
}

// values of the derivatives in eta direction
static void C_T_P1_2D_DeriveEta(double xi, double eta, double *values)
{
  values[0]=-1;
  values[1]=0;
  values[2]=1;
}
// values of the derivatives in xi-xi  direction
static void C_T_P1_2D_DeriveXiXi(double xi, double eta, double *values)
{
  values[0]=0;
  values[1]=0;
  values[2]=0;
}
// values of the derivatives in xi-eta direction
static void C_T_P1_2D_DeriveXiEta(double xi, double eta, double *values)
{
  values[0]=0;
  values[1]=0;
  values[2]=0;
}
// values of the derivatives in eta-eta direction
static void C_T_P1_2D_DeriveEtaEta(double xi, double eta, double *values)
{
  values[0]=0;
  values[1]=0;
  values[2]=0;
}

// ***********************************************************************

TBaseFunct2D *BF_C_T_P1_2D_Obj = new TBaseFunct2D
        (3, BF_C_T_P1_2D, BFUnitTriangle, 
         C_T_P1_2D_Funct, C_T_P1_2D_DeriveXi,
         C_T_P1_2D_DeriveEta, C_T_P1_2D_DeriveXiXi,
         C_T_P1_2D_DeriveXiEta, C_T_P1_2D_DeriveEtaEta, 1, 1,
         0, NULL);