From Ludovic, new file: macro to display and interact with reconstructed cascades.

diff --git a/EVE/alice-macros/esd_Cascade.C b/EVE/alice-macros/esd_Cascade.C
new file mode 100644 (file)
index 0000000..cc68f13
--- /dev/null
+++ b/EVE/alice-macros/esd_Cascade.C
@@ -0,0 +1,101 @@
+// #include "EVE/Alieve/EventAlieve.h"
+// #include "Reve/RGTopFrame.h"
+// #include "Reve/Cascade.h"
+
+// #include "AliESD.h"
+// #include "AliESDtrack.h"
+// #include "AliESDcascade.h"
+// #include "AliESDVertex.h"
+
+// using namespace Reve;
+// using namespace Alieve;
+
+
+
+Reve::Cascade* esd_make_cas(Reve::TrackRnrStyle* rnrStyle, AliESDVertex* primVtx, 
+                           AliESDcascade* cas, AliESDtrack* neg, AliESDtrack* pos,
+                           AliESDtrack* bach,Int_t i) {
+
+  Reve::Cascade* myCas = new Reve::Cascade(rnrStyle);
+  myCas->SetESDIndex(i);
+
+  static Double_t vx,vy,vz, px,py,pz;
+  cas->GetBPxPyPz(px,py,pz);
+  myCas->SetBachP(px,py,pz);
+  cas->GetNPxPyPz(px,py,pz);
+  myCas->SetNegP(px,py,pz);
+  cas->GetPPxPyPz(px,py,pz);
+  myCas->SetPosP(px,py,pz);
+
+  cas->GetXYZ(vx,vy,vz); // v0 decay vertex
+  myCas->SetV0vtx(vx,vy,vz);
+  cas->GetXYZcascade(vx,vy,vz); // cascade decay vertex
+  myCas->SetCascadeVtx(vx,vy,vz);
+
+  Double_t primx = primVtx->GetXv(),
+    primy = primVtx->GetYv(),
+    primz = primVtx->GetZv();
+
+  myCas->SetCasCosPointingAngle( cas->GetCascadeCosineOfPointingAngle(primx,primy,primz) );
+  myCas->SetDecayLength(primx, primy, primz);
+  myCas->SetDCA_v0_Bach(cas->GetDcaXiDaughters());
+
+  Float_t p = neg->GetP(), mc = neg->GetMass();
+  Float_t betaNeg = p/TMath::Sqrt(p*p + mc*mc);
+  p = pos->GetP(); mc = pos->GetMass();
+  Float_t betaPos = p/TMath::Sqrt(p*p + mc*mc);
+  p = bach->GetP(); mc = bach->GetMass();
+  Float_t betaBach = p/TMath::Sqrt(p*p + mc*mc);
+  if (bach->GetSign()<0) betaBach = -betaBach; // sign is stored is this parameter
+
+  myCas->SetBeta(betaNeg, betaPos, betaBach);
+
+  return myCas;
+}
+
+
+
+
+Reve::CascadeList* esd_Cascade(Double_t min_pt=0.1, Double_t max_pt=100)
+{
+
+  AliESD* esd = Alieve::Event::AssertESD();
+  AliESDVertex* primVertex =(AliESDVertex*) esd->GetVertex();
+
+  Reve::CascadeList* cont = new Reve::CascadeList("ESD cascade"); 
+  cont->SetMainColor(Color_t(3)); // green
+  Reve::TrackRnrStyle* rnrStyle = cont->GetRnrStyle();
+  rnrStyle->SetMagField( esd->GetMagneticField() );
+
+  gReve->AddRenderElement(cont);
+
+  Int_t count = 0;
+  //for (Int_t n=0; count<3; n++) {
+  for (Int_t n=0; n<esd->GetNumberOfCascades(); n++) {
+
+    AliESDcascade *cas = esd->GetCascade(n);
+    Int_t negInd = cas->GetNindex();
+    Int_t posInd = cas->GetPindex();
+    Int_t bachInd = cas->GetBindex();
+    AliESDtrack* negTr = esd->GetTrack(negInd);
+    AliESDtrack* posTr = esd->GetTrack(posInd);
+    AliESDtrack* bachTr = esd->GetTrack(bachInd);
+
+    if (cas) {
+      Reve::Cascade* myCas = esd_make_cas(rnrStyle, primVertex, cas,
+                                         negTr, posTr, bachTr, n);
+      if (myCas) {
+       gReve->AddRenderElement(cont, myCas);
+       count++;
+      }
+    }
+  }
+
+  cont->SetTitle("CascadeList");
+  cont->UpdateItems();
+
+  cont->MakeCascades();
+  gReve->Redraw3D();
+
+  return cont;
+}