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gtime.C File Reference

Detailed Description

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Example of TGraphTime.

#include "TCanvas.h"
#include "TRandom3.h"
#include "TMath.h"
#include "TText.h"
#include "TArrow.h"
#include "TGraphTime.h"
#include <vector>
void gtime(Int_t nsteps = 500, Int_t np = 100)
{
if (np > 1000) np = 1000;
std::vector<Int_t> color(np);
std::vector<Double_t> rr(np), phi(np), dr(np), size(np);
Double_t xmin = -10, xmax = 10, ymin = -10, ymax = 10;
auto g = new TGraphTime(nsteps, xmin, ymin, xmax, ymax);
g->SetTitle("TGraphTime demo;X domain;Y domain");
for (Int_t i = 0; i < np; i++) { // calculate some object parameters
rr[i] = r.Uniform(0.1 * xmax, 0.2 * xmax);
phi[i] = r.Uniform(0, 2 * TMath::Pi());
dr[i] = r.Uniform(0, 1) * 0.9 * xmax / Double_t(nsteps);
Double_t rc = r.Rndm();
if (rc > 0.7)
color[i] = kYellow;
else if (rc > 0.3)
color[i] = kBlue;
else
color[i] = kRed;
size[i] = r.Uniform(0.5, 6);
}
for (Int_t s = 0; s < nsteps; s++) { // fill the TGraphTime step by step
for (Int_t i = 0; i < np; i++) {
Double_t newr = rr[i] + dr[i] * s;
Double_t newsize = 0.2 + size[i] * TMath::Abs(TMath::Sin(newr + 10));
Double_t newphi = phi[i] + 0.01 * s;
Double_t xx = newr * TMath::Cos(newphi);
Double_t yy = newr * TMath::Sin(newphi);
TMarker *m = new TMarker(xx, yy, 20);
m->SetMarkerColor(color[i]);
m->SetMarkerSize(newsize);
g->Add(m, s);
if (i == np - 1)
g->Add(new TArrow(xmin, ymax, xx, yy, 0.02, "-|>"), s);
}
g->Add(new TPaveLabel(.90, .92, .98, .97, TString::Format("%d", s + 1), "brNDC"), s);
}
g->Draw();
// save object as animated gif
// g->SaveAnimatedGif("gtime.gif");
//save object to a file
auto f = TFile::Open("gtime.root","recreate");
f->WriteObject(g, "g");
delete f;
//to view this object in another session do
// TFile::Open("gtime.root");
// g->Draw();
}
#define f(i)
Definition RSha256.hxx:104
#define g(i)
Definition RSha256.hxx:105
size_t size(const MatrixT &matrix)
retrieve the size of a square matrix
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
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
Draw all kinds of Arrows.
Definition TArrow.h:29
virtual void SetMarkerColor(Color_t mcolor=1)
Set the marker color.
Definition TAttMarker.h:38
virtual void SetMarkerSize(Size_t msize=1)
Set the marker size.
Definition TAttMarker.h:45
static TFile * Open(const char *name, Option_t *option="", const char *ftitle="", Int_t compress=ROOT::RCompressionSetting::EDefaults::kUseCompiledDefault, Int_t netopt=0)
Create / open a file.
Definition TFile.cxx:4089
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:594
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:588
Short_t Abs(Short_t d)
Returns the absolute value of parameter Short_t d.
Definition TMathBase.h:123
TMarker m
Definition textangle.C:8
Author
Rene Brun

Definition in file gtime.C.