void test2()
{
  // Mirror parameters
  const Double_t kR1 = 1363;
  const Double_t kRad = 425;
  const Double_t kR2 = 1363+8;

  TGeoManager* manager = new TGeoManager("manager", "test");

  // Make the world
  TGeoBBox* box1 = new TGeoBBox("box1", 2000, 2000, 2000);
  TGeoVolume *top = new TGeoVolume("top", box1);
  manager->SetTopVolume(top);

  // Mirror
  Double_t r = kR2*TMath::Tan(TMath::ASin(kRad/kR1));
  Double_t deg2rad = TMath::Pi()/180;

  TGeoArb8* cut = new TGeoArb8("cut", kR2/2.);
  for(Int_t i=0; i<i; j++) cut->SetVertex(i, 0, 0);
  cut->SetVertex(4, r*TMath::Cos(60*deg2rad), r*TMath::Sin(60*deg2rad));
  cut->SetVertex(5, r*TMath::Cos(-8.6*deg2rad), r*TMath::Sin(-8.6*deg2rad));
  cut->SetVertex(6, r*TMath::Cos(188.6*deg2rad), r*TMath::Sin(188.6*deg2rad));
  cut->SetVertex(7, r*TMath::Cos(120*deg2rad), r*TMath::Sin(120*deg2rad));
      
  TGeoSphere* mirSph = new TGeoSphere("mirSph", kR1, kR2, 0,
					      TMath::ASin(kRad/kR1)/deg2rad);

  TGeoTranslation* tr = new TGeoTranslation("tr", 0, 0, kR2/2.);
  tr->RegisterYourself();

  TGeoCompositeShape* mirSphCut = new TGeoCompositeShape("cs", "mirSph*(cut:tr)");
  TGeoVolume* mirror = new TGeoVolume("mirror", mirSphCut);
  top->AddNode(mirror, 1);
  
  manager->CloseGeometry();

  top->Draw();
}