Vector LocalAverage::getCentralAtom(){ addDerivativeOfCentralAtomPos( 0, Tensor::identity() ); return getPositionOfCentralAtom(0); }
Vector NumberOfLinks::getCentralAtom(){ addDerivativeOfCentralAtomPos( 0, 0.5*Tensor::identity() ); addDerivativeOfCentralAtomPos( 1, 0.5*Tensor::identity() ); return 0.5*( getPositionOfCentralAtom(0) + getPositionOfCentralAtom(1) ); }
Vector OrientationSphere::getCentralAtom(){ addDerivativeOfCentralAtomPos( 0, Tensor::identity() ); return getPositionOfCentralAtom(0); }