/** Produce the secondary radius based upon the second atom radius. */
 public float getSplitBondRadius(final Bond bond) {
   final Atom atom = bond.getAtom(1);
   final StructureMap structureMap = atom.getStructure().getStructureMap();
   final StructureStyles structureStyles = structureMap.getStructureStyles();
   final AtomStyle atomStyle = (AtomStyle) structureStyles.getStyle(atom);
   return this.scale * atomStyle.getAtomRadius(atom);
 }