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gr018_time2.C File Reference

Detailed Description

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Example of TGraphTime showing how the class could be used to visualize a set of particles with their time stamp in a MonteCarlo program.

See the TGraphTime documentation

#include "TRandom3.h"
#include "TMath.h"
#include "TMarker.h"
#include "TPaveLabel.h"
#include "TArrow.h"
#include "TGraphTime.h"
#include <vector>
void gr018_time2(Int_t nsteps = 200, Int_t np = 5000)
{
if (np > 5000) np = 5000;
std::vector<Int_t> color(np);
std::vector<Double_t> cosphi(np), sinphi(np), speed(np);
Double_t xmin = 0, xmax = 10, ymin = -10, ymax = 10;
g->SetTitle("TGraphTime demo 2;X;Y");
for (Int_t i = 0; i < np; i++) { // calculate some object parameters
speed[i] = r.Uniform(0.5, 1);
Double_t phi = r.Gaus(0, TMath::Pi() / 6.);
cosphi[i] = fact * speed[i] * TMath::Cos(phi);
sinphi[i] = fact * speed[i] * TMath::Sin(phi);
Double_t rc = r.Rndm();
color[i] = kRed;
if (rc > 0.3) color[i] = kBlue;
if (rc > 0.7) color[i] = kYellow;
}
for (Int_t s = 0; s < nsteps; s++) { // fill the TGraphTime step by step
for (Int_t i = 0; i < np; i++) {
Double_t xx = s*cosphi[i];
if (xx < xmin) continue;
Double_t yy = s*sinphi[i];
TMarker *m = new TMarker(xx,yy,25);
m->SetMarkerColor(color[i]);
m->SetMarkerSize(1.5 -s/(speed[i]*nsteps));
g->Add(m, s);
}
g->Add(new TPaveLabel(.70,.92,.98,.99,TString::Format("shower at %5.3f nsec",3.*s/nsteps),"brNDC"),s);
}
g->Draw();
// save object as animated gif
// g->SaveAnimatedGif("gr18_time2.gif");
// start animation, can be stopped with g->Animate(kFALSE);
// g->Animate();
}
#define g(i)
Definition RSha256.hxx:105
int Int_t
Definition RtypesCore.h:45
double Double_t
Definition RtypesCore.h:59
@ kRed
Definition Rtypes.h:66
@ kBlue
Definition Rtypes.h:66
@ kYellow
Definition Rtypes.h:66
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t Float_t Float_t Int_t Int_t UInt_t UInt_t Rectangle_t Int_t Int_t Window_t TString Int_t GCValues_t GetPrimarySelectionOwner GetDisplay GetScreen GetColormap GetNativeEvent const char const char dpyName wid window const char font_name cursor keysym reg const char only_if_exist regb h Point_t np
Option_t Option_t TPoint TPoint const char GetTextMagnitude GetFillStyle GetLineColor GetLineWidth GetMarkerStyle GetTextAlign GetTextColor GetTextSize void char Point_t Rectangle_t WindowAttributes_t Float_t r
float xmin
float ymin
float xmax
float ymax
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition TAttMarker.h:39
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition TAttMarker.h:46
TGraphTime is used to draw a set of objects evolving with nsteps in time between tmin and tmax.
Definition TGraphTime.h:30
Manages Markers.
Definition TMarker.h:22
A Pave (see TPave) with a text centered in the Pave.
Definition TPaveLabel.h:20
Random number generator class based on M.
Definition TRandom3.h:27
static TString Format(const char *fmt,...)
Static method which formats a string using a printf style format descriptor and return a TString.
Definition TString.cxx:2378
Double_t Cos(Double_t)
Returns the cosine of an angle of x radians.
Definition TMath.h:598
constexpr Double_t Pi()
Definition TMath.h:37
Double_t Sin(Double_t)
Returns the sine of an angle of x radians.
Definition TMath.h:592
TMarker m
Definition textangle.C:8
Author
Rene Brun

Definition in file gr018_time2.C.