[closestPointPerf] added documentation
[closestPointPerf] added documentation

RobertoMalatesta/plottable,RobertoMalatesta/plottable,onaio/plottable,palantir/plottable,gdseller/plottable,alyssaq/plottable,NextTuesday/plottable,softwords/plottable,onaio/plottable,iobeam/plottable,NextTuesday/plottable,jacqt/plottable,palantir/plottable,palantir/plottable,iobeam/plottable,NextTuesday/plottable,gdseller/plottable,danmane/plottable,iobeam/plottable,jacqt/plottable,gdseller/plottable,palantir/plottable,softwords/plottable,softwords/plottable,alyssaq/plottable,jacqt/plottable,onaio/plottable,danmane/plottable,alyssaq/plottable,RobertoMalatesta/plottable,danmane/plottable