void draw_dedx() {
	gSystem->Load("/home/soft/tbb/libtbb");
	gSystem->Load("/u/andrey/soft/tbb/Lenny64/libtbb");
	gSystem->Load("/u/andrey/soft/tbb/Etch32/libtbb");

	gROOT->LoadMacro("$VMCWORKDIR/gconfig/basiclibs.C");
	basiclibs();
	gROOT->LoadMacro("$VMCWORKDIR/macro/littrack/cbmrootlibs.C");
	cbmrootlibs();

	CbmLitCheckEnergyLoss checker;
	checker.SetMaterial("iron");
	checker.Check();

//	CbmLitCheckBrem checker;
//	checker.SetMaterial("iron");
//	checker.Check();
}