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pointset.C File Reference

Detailed Description

Demonstrates usage of class TEvePointSet.

#include <TEveManager.h>
#include <TEvePointSet.h>
#include <TColor.h>
#include <TRandom.h>
#include <TMath.h>
TEvePointSet* pointset(Int_t npoints = 512, TEveElement* parent=nullptr)
if (!gRandom) gRandom = new TRandom(0);
Float_t s = 100;
auto ps = new TEvePointSet();
for(Int_t i = 0; i<npoints; i++)
ps->SetNextPoint(r.Uniform(-s,s), r.Uniform(-s,s), r.Uniform(-s,s));
ps->SetPointId(new TNamed(Form("Point %d", i), ""));
ps->SetMarkerColor(TMath::Nint(r.Uniform(2, 9)));
ps->SetMarkerSize(r.Uniform(1, 2));
if (parent) {
} else {
return ps;
TEvePointSet* pointset_hierarchy(Int_t level=3, Int_t nps=1, Int_t fac=2,
Int_t npoints=512, TEveElement* parent=nullptr)
// This only works in compiled mode!
TEvePointSet* ps = nullptr;
for (Int_t i=0; i<nps; ++i) {
printf("level=%d nps=%d i=%d\n", level, nps, i);
ps = pointset(npoints, parent);
if (level) {
pointset_hierarchy(level, nps*fac, fac, npoints/fac, ps);
return ps;
TEvePointSetArray* pointsetarray()
TRandom r(0);
auto l = new TEvePointSetArray("TPC hits - Charge Slices", "");
l->SetMarkerStyle(4); // antialiased circle
l->InitBins("Charge", 9, 10, 100);
TColor::SetPalette(1, nullptr); // Spectrum palette
for (Int_t i = 1; i <= 9; ++i)
l->GetBin(i)->SetMainColor(TColor::GetColorPalette(i * nCol / 10));
l->GetBin(0) ->SetMainColor(kGray);
Double_t rad, phi, z;
for (Int_t i = 0; i < 10000; ++i) {
rad = r.Uniform(60, 180);
phi = r.Uniform(0, TMath::TwoPi());
z = r.Uniform(-250, 250);
l->Fill(rad*TMath::Cos(phi), rad*TMath::Sin(phi), z, r.Uniform(0, 110));
return l;
int Int_t
Definition RtypesCore.h:45
float Float_t
Definition RtypesCore.h:57
double Double_t
Definition RtypesCore.h:59
constexpr Bool_t kTRUE
Definition RtypesCore.h:100
@ kGray
Definition Rtypes.h:65
@ kWhite
Definition Rtypes.h:65
R__EXTERN TEveManager * gEve
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
R__EXTERN TRandom * gRandom
Definition TRandom.h:62
char * Form(const char *fmt,...)
Formats a string in a circular formatting buffer.
Definition TString.cxx:2467
static void SetPalette(Int_t ncolors, Int_t *colors, Float_t alpha=1.)
Static function.
Definition TColor.cxx:2566
static Int_t GetColorPalette(Int_t i)
Static function returning the color number i in current palette.
Definition TColor.cxx:1450
static Int_t GetNumberOfColors()
Static function returning number of colors in the color palette.
Definition TColor.cxx:1470
Base class for TEveUtil visualization elements, providing hierarchy management, rendering control and...
Definition TEveElement.h:36
void AddElement(TEveElement *element, TEveElement *parent=nullptr)
Add an element.
static TEveManager * Create(Bool_t map_window=kTRUE, Option_t *opt="FIV")
If global TEveManager* gEve is not set initialize it.
void Redraw3D(Bool_t resetCameras=kFALSE, Bool_t dropLogicals=kFALSE)
An array of point-sets with each point-set playing a role of a bin in a histogram.
TEvePointSet is a render-element holding a collection of 3D points with optional per-point TRef and a...
The TNamed class is the base class for all named ROOT classes.
Definition TNamed.h:29
This is the base class for the ROOT Random number generators.
Definition TRandom.h:27
Int_t Nint(T x)
Round to nearest integer. Rounds half integers to the nearest even integer.
Definition TMath.h:693
Double_t Cos(Double_t)
Returns the cosine of an angle of x radians.
Definition TMath.h:594
Double_t Sin(Double_t)
Returns the sine of an angle of x radians.
Definition TMath.h:588
constexpr Double_t TwoPi()
Definition TMath.h:44
TLine l
Definition textangle.C:4
Matevz Tadel

Definition in file pointset.C.