ROOT
v6-22
Reference Guide
pointset.C File Reference
Tutorials
»
Event display tutorials
Detailed Description
Demonstrates usage of class
TEvePointSet
.
#include <
TEveManager.h
>
#include <
TEvePointSet.h
>
#include <
TEveRGBAPalette.h
>
#include <
TColor.h
>
#include <
TRandom.h
>
#include <
TMath.h
>
TEvePointSet
* pointset(
Int_t
npoints = 512,
TEveElement
* parent=0)
{
TEveManager::Create
();
if
(!
gRandom
)
gRandom
=
new
TRandom
(0);
TRandom
&
r
= *
gRandom
;
Float_t
s
= 100;
auto
ps
=
new
TEvePointSet
();
ps
->SetOwnIds(
kTRUE
);
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));
ps
->SetMarkerStyle(4);
if
(parent) {
parent->AddElement(
ps
);
}
else
{
gEve
->
AddElement
(
ps
);
gEve
->
Redraw3D
();
}
return
ps
;
}
TEvePointSet
* pointset_hierarchy(
Int_t
level=3,
Int_t
nps=1,
Int_t
fac=2,
Int_t
npoints=512,
TEveElement
* parent=0)
{
// This only works in compiled mode!
TEvePointSet
*
ps
= 0;
--level;
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()
{
TEveManager::Create
();
TRandom
r
(0);
auto
l
=
new
TEvePointSetArray
(
"TPC hits - Charge Slices"
,
""
);
l
->SetSourceCS(
TEvePointSelectorConsumer::kTVT_RPhiZ
);
l
->SetMarkerColor(3);
l
->SetMarkerStyle(4);
// antialiased circle
l
->SetMarkerSize(0.8);
gEve
->
AddElement
(
l
);
l
->InitBins(
"Charge"
, 9, 10, 100);
TColor::SetPalette
(1, 0);
// Spectrum palette
const
Int_t
nCol =
TColor::GetNumberOfColors
();
for
(
Int_t
i = 1; i <= 9; ++i)
l
->GetBin(i)->SetMainColor(
TColor::GetColorPalette
(i * nCol / 10));
l
->GetBin(0) ->SetMainColor(
kGray
);
l
->GetBin(10)->SetMainColor(
kWhite
);
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));
}
l
->CloseBins();
gEve
->
Redraw3D
();
return
l
;
}
r
ROOT::R::TRInterface & r
Definition:
Object.C:4
Int_t
int Int_t
Definition:
RtypesCore.h:43
Double_t
double Double_t
Definition:
RtypesCore.h:57
Float_t
float Float_t
Definition:
RtypesCore.h:55
kTRUE
const Bool_t kTRUE
Definition:
RtypesCore.h:89
kGray
@ kGray
Definition:
Rtypes.h:63
kWhite
@ kWhite
Definition:
Rtypes.h:63
TColor.h
TEveManager.h
gEve
R__EXTERN TEveManager * gEve
Definition:
TEveManager.h:243
TEvePointSet.h
TEveRGBAPalette.h
TMath.h
TRandom.h
gRandom
R__EXTERN TRandom * gRandom
Definition:
TRandom.h:62
Form
char * Form(const char *fmt,...)
TColor::SetPalette
static void SetPalette(Int_t ncolors, Int_t *colors, Float_t alpha=1.)
Static function.
Definition:
TColor.cxx:2417
TColor::GetColorPalette
static Int_t GetColorPalette(Int_t i)
Static function returning the color number i in current palette.
Definition:
TColor.cxx:1393
TColor::GetNumberOfColors
static Int_t GetNumberOfColors()
Static function returning number of colors in the color palette.
Definition:
TColor.cxx:1413
TEveElement
Base class for TEveUtil visualization elements, providing hierarchy management, rendering control and...
Definition:
TEveElement.h:34
TEveManager::AddElement
void AddElement(TEveElement *element, TEveElement *parent=0)
Add an element.
Definition:
TEveManager.cxx:528
TEveManager::Create
static TEveManager * Create(Bool_t map_window=kTRUE, Option_t *opt="FIV")
If global TEveManager* gEve is not set initialize it.
Definition:
TEveManager.cxx:893
TEveManager::Redraw3D
void Redraw3D(Bool_t resetCameras=kFALSE, Bool_t dropLogicals=kFALSE)
Definition:
TEveManager.h:168
TEvePointSelectorConsumer::kTVT_RPhiZ
@ kTVT_RPhiZ
Definition:
TEveTreeTools.h:48
TEvePointSetArray
An array of point-sets with each point-set playing a role of a bin in a histogram.
Definition:
TEvePointSet.h:111
TEvePointSet
TEvePointSet is a render-element holding a collection of 3D points with optional per-point TRef and a...
Definition:
TEvePointSet.h:36
TNamed
The TNamed class is the base class for all named ROOT classes.
Definition:
TNamed.h:29
TRandom
This is the base class for the ROOT Random number generators.
Definition:
TRandom.h:27
TGeant4Unit::rad
static constexpr double rad
Definition:
TGeant4SystemOfUnits.h:142
TGeant4Unit::s
static constexpr double s
Definition:
TGeant4SystemOfUnits.h:162
TGeant4Unit::ps
static constexpr double ps
Definition:
TGeant4SystemOfUnits.h:165
TMath::Nint
Int_t Nint(T x)
Round to nearest integer. Rounds half integers to the nearest even integer.
Definition:
TMath.h:703
TMath::Cos
Double_t Cos(Double_t)
Definition:
TMath.h:631
TMath::Sin
Double_t Sin(Double_t)
Definition:
TMath.h:627
TMath::TwoPi
constexpr Double_t TwoPi()
Definition:
TMath.h:45
l
auto * l
Definition:
textangle.C:4
Author
Matevz Tadel
Definition in file
pointset.C
.
tutorials
eve
pointset.C
ROOT v6-22 - Reference Guide Generated on Fri Apr 1 2022 11:54:07 (GVA Time) using Doxygen 1.9.4