private static Atom calcSimple_H(Atom c, Atom o, Atom n) throws StructureException {
Atom h = Calc.substract(c, o);
double dist = Calc.getDistance(o, c);
// System.out.println(dist);
double x = n.getX() + h.getX() / dist;
double y = n.getY() + h.getY() / dist;
double z = n.getZ() + h.getZ() / dist;
h.setX(x);
h.setY(y);
h.setZ(z);
h.setName("H");
h.setFullName(" H ");
return h;
}