TVirtualGeoChecker.cxx

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/*************************************************************************
 * Copyright (C) 1995-2025, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
/** \class TVirtualGeoChecker
\ingroup Geometry_classes
 
Abstract class for geometry checkers
*/
 
#include "TROOT.h"
#include "TVirtualGeoChecker.h"
#include "TPluginManager.h"
#include "TGeoManager.h"
 
TVirtualGeoChecker *TVirtualGeoChecker::fgGeoChecker = nullptr;
 
////////////////////////////////////////////////////////////////////////////////
/// Geometry checker default constructor
 
TVirtualGeoChecker::TVirtualGeoChecker() {}
 
////////////////////////////////////////////////////////////////////////////////
/// Geometry checker destructor
 
TVirtualGeoChecker::~TVirtualGeoChecker()
{
   fgGeoChecker = nullptr;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set number of points to be generated on the shape outline when checking for overlaps.
 
void TVirtualGeoChecker::SetNmeshPoints(Int_t npoints)
{
   fNmeshPoints = npoints;
   if (npoints < 1000) {
      Error("SetNmeshPoints", "Cannot allow less than 1000 points for checking - set to 1000");
      fNmeshPoints = 1000;
   }
}
 
////////////////////////////////////////////////////////////////////////////////
/// Static function returning a pointer to the geometry checker.
/// If the geometry checker does not exist a default checker is created.
 
TVirtualGeoChecker *TVirtualGeoChecker::GeoChecker()
{
   // if no painter set yet, create a default painter via the PluginManager
   if (!fgGeoChecker) {
      TPluginHandler *h;
      if ((h = gROOT->GetPluginManager()->FindHandler("TVirtualGeoChecker"))) {
         if (h->LoadPlugin() == -1)
            return nullptr;
         fgGeoChecker = (TVirtualGeoChecker *)h->ExecPlugin(1, gGeoManager);
      }
   }
   return fgGeoChecker;
}