JChemPaintRendererModel model = chemModelRelay.getRenderer().getRenderer2DModel();
double d = model.getSelectionRadius() / model.getScale();
if (start.distance(worldCoord) < 4*d)
return;
IAtomContainer fromContainer = null, toContainer = null;
IChemModel chemModel = chemModelRelay.getChemModel();
if(source != null){
fromContainer = ChemModelManipulator.getRelevantAtomContainer(chemModel, source);
if (chemModelRelay.getPhantoms().getAtomCount() > 0)
chemModelRelay.getPhantoms().removeAtom(0);
if (merge != null)