ShapeTet4-impl.h

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namespace NumLib
{
template <class T_X, class T_N>
void ShapeTet4::computeShapeFunction(const T_X& r, T_N& N)
{
    N[0] = 1. - r[0] - r[1] - r[2];
    N[1] = r[0];
    N[2] = r[1];
    N[3] = r[2];
}
 
template <class T_X, class T_N>
void ShapeTet4::computeGradShapeFunction(const T_X& /*r*/, T_N& dNdr)
{
    // dr
    dNdr[0] = -1.0;
    dNdr[1] = 1.0;
    dNdr[2] = 0.0;
    dNdr[3] = 0.0;
 
    // ds
    dNdr[4] = -1.0;
    dNdr[5] = 0.0;
    dNdr[6] = 1.0;
    dNdr[7] = 0.0;
 
    // dt
    dNdr[8] = -1.0;
    dNdr[9] = 0.0;
    dNdr[10] = 0.0;
    dNdr[11] = 1.0;
}
 
}  // namespace NumLib