calorimeters.C

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/// \file
/// \ingroup tutorial_eve_7
///
/// \macro_code
///
#include <ROOT/REveElement.hxx>
#include <ROOT/REveScene.hxx>
#include <ROOT/REveViewer.hxx>
#include <ROOT/REveManager.hxx>
#include <ROOT/REveCaloData.hxx>
#include <ROOT/REveCalo.hxx>
#include <ROOT/REveJetCone.hxx>
#include <ROOT/REveGeoShape.hxx>
 
#include "TFile.h"
#include "TGeoTube.h"
 
const char *histFile = "http://root.cern/files/cms_calo_hist.root";
 
const Double_t kR_min = 128;
const Double_t kR_max = 129;
const Double_t kZ_d = 268.39;
 
using namespace ROOT::Experimental;
 
void makeCalo2D(REveCalo3D *calo3d, const char *pname, REveProjection::EPType_e t)
{
   auto eveMng = ROOT::Experimental::gEve;
 
   auto geomScene = eveMng->SpawnNewScene(Form("%s Geometry", pname), pname);
   auto eventScene = eveMng->SpawnNewScene(Form("%s Event Data", pname), pname);
 
   auto mng = new REveProjectionManager();
   mng->SetProjection(t);
 
   // project Calo3D
   REveCalo2D *calo2d = (REveCalo2D *)mng->ImportElements(calo3d, eventScene);
 
   // project reference geometry
   REveElement *geo2d = mng->ImportElements(eveMng->GetGlobalScene()->FirstChild(), geomScene);
 
   auto view = eveMng->SpawnNewViewer("RPhi View", "");
   view->SetCameraType(REveViewer::kCameraOrthoXOY);
   view->AddScene(geomScene);
   view->AddScene(eventScene);
}
 
void add_jet(REveElement *parent, const char *name, Float_t eta, Float_t phi, Float_t deta, Float_t dphi)
{
   auto jet = new REveJetCone(name, name);
   jet->SetMainTransparency(60);
   jet->SetLineColor(kRed);
   jet->SetCylinder(kR_min - 10, kZ_d - 10);
   jet->AddEllipticCone(eta, phi, deta, dphi);
   jet->SetPickable(kTRUE);
   jet->SetHighlightFrame(kFALSE);
   parent->AddElement(jet);
}
 
void calorimeters()
{
   auto eveMng = REveManager::Create();
 
   TFile::SetCacheFileDir(".");
   auto hf = TFile::Open(histFile, "CACHEREAD");
   auto ecalHist = (TH2F *)hf->Get("ecalLego");
   auto hcalHist = (TH2F *)hf->Get("hcalLego");
   auto data = new REveCaloDataHist();
   data->AddHistogram(ecalHist);
   data->RefSliceInfo(0).Setup("ECAL", 0.f, kBlue);
   data->AddHistogram(hcalHist);
   data->RefSliceInfo(1).Setup("HCAL", 0.1, kRed);
   eveMng->GetEventScene()->AddElement(data);
 
   auto b1 = new REveGeoShape("Barrel 1");
   b1->SetShape(new TGeoTube(kR_min, kR_max, kZ_d));
   b1->SetMainColor(kCyan);
   b1->SetMainTransparency(90);
   b1->SetNSegments(80);
   eveMng->GetGlobalScene()->AddElement(b1);
 
   auto calo3d = new REveCalo3D(data);
   calo3d->SetBarrelRadius(kR_max + 1);
   calo3d->SetEndCapPos(kZ_d + 1);
   calo3d->SetMaxTowerH(300);
   eveMng->GetEventScene()->AddElement(calo3d);
 
   add_jet(calo3d, "JetCone Lojz", 1.4, 1.0, 0.4, 0.2);
   add_jet(calo3d, "JetCone Mici", -2.0, -2.1, 0.2, 0.4);
 
   makeCalo2D(calo3d, "RPhi", REveProjection::kPT_RPhi);
   makeCalo2D(calo3d, "RhoZ", REveProjection::kPT_RhoZ);
 
   eveMng->Show();
}