/****************************************************************************
 *           Origin: I.Belikov, CERN, Jouri.Belikov@cern.ch                 *
 ****************************************************************************/

#ifndef __CINT__
#include <Riostream.h>
#include <TFile.h>
#include <TTree.h>
#include <TCanvas.h>
#include <TView.h>
#include <TPolyMarker3D.h>
#include <TNode.h>
#include <TGeometry.h>

#include "AliTPCParam.h"
#include "AliClusters.h"
#include "AliTPCcluster.h"
#endif

Int_t AliTPCDisplayClusters(Int_t eventn=0, Int_t noiseth=15) {
   cerr<<"Displaying clusters...\n";

   TFile *file=TFile::Open("galice.root");
   if (!file->IsOpen()) {cerr<<"Can't open galice.root !\n"; return 1;}

   TFile *cf=TFile::Open("AliTPCclusters.root");
   if (!cf->IsOpen()){cerr<<"Can't open AliTPCclusters.root !\n"; return 3;}

   AliTPCParam *dig=(AliTPCParam *)cf->Get("75x40_100x60_150x60");
   if (!dig) {cerr<<"TPC parameters have not been found !\n"; return 2;}

   TCanvas *c1=new TCanvas("cdisplay", "Cluster display",0,0,700,730);
   TView *v=new TView(1);
   v->SetRange(-430,-560,-430,430,560,1710);
   c1->Clear();
   c1->SetFillColor(1);
   c1->SetTheta(90.);
   c1->SetPhi(0.);

   char  cname[100];
   sprintf(cname,"TreeC_TPC_%d",eventn);
   TTree *cTree=(TTree *)cf->Get(cname);
   if (!cTree) {
     cerr<<"Can't find tree : "<<cname<<endl;
     return 1;
   }

   AliClusters *clusters=new AliClusters(); 
   clusters->SetClass("AliTPCcluster");

   cTree->SetBranchAddress("Segment",&clusters);

   Int_t nrows=Int_t(cTree->GetEntries());
   for (Int_t n=0; n<nrows; n++) {
       cTree->GetEvent(n);
       Int_t sec,row;
       dig->AdjustSectorRow(clusters->GetID(),sec,row);
       TClonesArray &clrow=*clusters->GetArray();
       Int_t ncl=clrow.GetEntriesFast();
       TPolyMarker3D *pm=new TPolyMarker3D(ncl);
       while (ncl--) {
           AliTPCcluster *cl=(AliTPCcluster*)clrow[ncl];
           Double_t x=dig->GetPadRowRadii(sec,row), y=cl->GetY(), z=cl->GetZ();
	   if (cl->GetQ()<noiseth) continue;
           Float_t cs, sn, tmp;
           dig->AdjustCosSin(sec,cs,sn);
           tmp = x*cs-y*sn; y= x*sn+y*cs; x=tmp;
           pm->SetPoint(ncl,x,y,z);
       }
       clrow.Clear();
       pm->SetMarkerSize(1); pm->SetMarkerColor(2); pm->SetMarkerStyle(1);
       pm->Draw();
   }
   delete cTree;
   delete dig;
   cf->Close();

   TGeometry *geom=(TGeometry*)file->Get("AliceGeom");
   TNode * main = (TNode*)((geom->GetListOfNodes())->First());
   TIter next(main->GetListOfNodes());
   TNode  *module=0;
   while((module = (TNode*)next())) {
     char ch[100];
     sprintf(ch,"%s\n",module->GetTitle());
     //printf("%s\n",module->GetTitle());
     if (ch[0]=='T'&&ch[1]=='P' && ch[2]=='C')  //if TPC draw
       module->SetVisibility(3);
     else
       module->SetVisibility(-1);
   }
     
   
   geom->Draw("same");
   c1->Modified(); c1->Update(); 

   file->Close();
   return 0;
}