basisGradient[0] = -1.;
basisGradient[1] = -1.;
basisGradient[2] = 0.;

basisGradient[3] = +1.;
basisGradient[4] = 0.;
basisGradient[5] = 0.;

basisGradient[6] = 0.;
basisGradient[7] = +1.;
basisGradient[8] = 0.;
