lineset.C

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/// \file
/// \ingroup tutorial_eve
/// Demonstrates usage of class REveStraightLineSet. The elements in the set can be individually picked when enable secondary select.
/// The REveStraightLineSet is a projectable class. It can be visible in RhoZ and RhoPhi projected views.
///
/// \macro_code
///
 
#include "TRandom.h"
 
#include <ROOT/REveElement.hxx>
#include <ROOT/REveScene.hxx>
#include <ROOT/REveManager.hxx>
#include <ROOT/REveStraightLineSet.hxx>
 
namespace REX = ROOT::Experimental;
 
REX::REveStraightLineSet* makeLineSet(Int_t nlines = 40, Int_t nmarkers = 4, bool sc = true)
{
   TRandom r(0);
   Float_t s = 100;
 
   auto ls = new REX::REveStraightLineSet();
 
   for (Int_t i = 0; i<nlines; i++) {
      ls->AddLine( r.Uniform(-s,s), r.Uniform(-s,s), r.Uniform(-s,s),
                   r.Uniform(-s,s), r.Uniform(-s,s), r.Uniform(-s,s));
      // add random number of markers
      Int_t nm =  1 + Int_t(nmarkers * r.Rndm());
      for (Int_t m = 0; m < nm; m++) ls->AddMarker(i, r.Rndm());
   }
 
   ls->SetMarkerSize(5);
   ls->SetMarkerStyle(1);
   ls->SetAlwaysSecSelect(sc);
   REX::gEve->GetEventScene()->AddElement(ls);
 
   return ls;
}
 
void lineset(bool secondarySelect = true)
{
   auto eveMng = REX::REveManager::Create();
 
   auto ls1 = makeLineSet(50, 10, secondarySelect);
   ls1->SetMainColor(kViolet);
   ls1->SetMarkerColor(kGreen + 3);
   ls1->SetName("LineSet_1");
   
   auto ls2 = makeLineSet(200, 20, secondarySelect);
   ls2->SetMainColor(kBlue);
   ls2->SetMarkerColor(kCyan + 2);
   ls2->SetName("LineSet_2");
   ls2->InitMainTrans();
   ls2->RefMainTrans().Move3LF(40, 200, 200);
 
   eveMng->Show();
}