doc/master/gl_2transp_8C.html

// Includes for ACLiC (cling does not need them).

#include "TCanvas.h"

#include "TColor.h"

#include "TError.h"

#include "TStyle.h"

#include "TH1F.h"


void transp(bool gl = true)

{

   auto redIndex = TColor::GetColor((Float_t)1., 0., 0., 0.85);

   auto greeIndex = TColor::GetColor((Float_t)0., 1., 0., 0.5);


   gStyle->SetCanvasPreferGL(kTRUE);

   auto cnv = new TCanvas("trasnparency", "transparency demo", 600, 400);


   auto hist = new TH1F("a5", "b5", 10, -2., 3.);

   auto hist2 = new TH1F("c6", "d6", 10, -3., 3.);

   hist->FillRandom("landau", 100000);

   hist2->FillRandom("gaus", 100000);


   hist->SetFillColor(redIndex);

   hist2->SetFillColor(greeIndex);


   cnv->cd();

   hist2->Draw();

   hist->Draw("SAME");

}

Float_t
float Float_t
Definition RtypesCore.h:57

kTRUE
constexpr Bool_t kTRUE
Definition RtypesCore.h:93

TCanvas.h

TRangeDynCast
ROOT::Detail::TRangeCast< T, true > TRangeDynCast
TRangeDynCast is an adapter class that allows the typed iteration through a TCollection.
Definition TCollection.h:358

TColor.h

TError.h

TH1F.h

TStyle.h

gStyle
R__EXTERN TStyle * gStyle
Definition TStyle.h:442

ROOT::Detail::TRangeCast
Definition TCollection.h:311

TCanvas
The Canvas class.
Definition TCanvas.h:23

TColor::GetColor
static Int_t GetColor(const char *hexcolor)
Static method returning color number for color specified by hex color string of form: "#rrggbb",...
Definition TColor.cxx:1924

TH1F
1-D histogram with a float per channel (see TH1 documentation)
Definition TH1.h:645

TStyle::SetCanvasPreferGL
void SetCanvasPreferGL(Bool_t prefer=kTRUE)
Definition TStyle.h:345