points.C

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/// \file
/// \ingroup tutorial_eve_7
///  This example display only points in web browser
///
/// \macro_code
///
 
#include "TRandom.h"
#include <ROOT/REveElement.hxx>
#include <ROOT/REveScene.hxx>
#include <ROOT/REveManager.hxx>
#include <ROOT/REvePointSet.hxx>
 
namespace REX = ROOT::Experimental;
 
REX::REvePointSet *createPointSet(int npoints = 2, float s = 2, int color = 28)
{
   TRandom &r = *gRandom;
 
   REX::REvePointSet *ps = new REX::REvePointSet("MyTestPoints", "list of eve points", npoints);
 
   for (Int_t i = 0; i < npoints; ++i)
      ps->SetNextPoint(r.Uniform(-s, s), r.Uniform(-s, s), r.Uniform(-s, s));
 
   ps->SetMarkerColor(color);
   ps->SetMarkerSize(5 + r.Uniform(1, 15));
   ps->SetMarkerStyle(4);
   return ps;
}
 
void points()
{
   auto eveMng = REX::REveManager::Create();
 
   REX::REveElement *event = eveMng->GetEventScene();
 
   auto psDot = createPointSet(100, 300);
   psDot->SetMarkerStyle(1);
   event->AddElement(psDot);
 
   auto psSquare = createPointSet(100, 300);
   psSquare->SetMarkerStyle(2);
   event->AddElement(psSquare);
 
   auto psStar = createPointSet(10, 300);
   psStar->SetMarkerStyle(3);
   event->AddElement(psStar);
 
   eveMng->Show();
}