TF2GL.cxx

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// @(#)root/gl:$Id$
// Author:  Matevz Tadel, Jun 2007
 
/*************************************************************************
 * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers.               *
 * All rights reserved.                                                  *
 *                                                                       *
 * For the licensing terms see $ROOTSYS/LICENSE.                         *
 * For the list of contributors see $ROOTSYS/README/CREDITS.             *
 *************************************************************************/
 
#include "TF2GL.h"
 
#include <TF2.h>
#include <TF3.h>
#include <TH2.h>
#include <TVirtualPad.h>
 
#include "TGLSurfacePainter.h"
#include "TGLTF3Painter.h"
#include "TGLAxisPainter.h"
 
#include "TGLRnrCtx.h"
 
#include "TGLIncludes.h"
 
/** \class TF2GL
\ingroup opengl
GL renderer for TF2.
TGLPlotPainter is used internally.
*/
 
ClassImp(TF2GL);
 
////////////////////////////////////////////////////////////////////////////////
/// Constructor.
 
TF2GL::TF2GL() : TGLPlot3D(), fM(0), fH(0)
{
}
 
////////////////////////////////////////////////////////////////////////////////
/// Destructor.
 
TF2GL::~TF2GL()
{
   delete fH;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Set model object.
 
Bool_t TF2GL::SetModel(TObject* obj, const Option_t* opt)
{
   TString option(opt);
   option.ToLower();
 
   fM = SetModelDynCast<TF2>(obj);
 
   fH = (TH2*) fM->CreateHistogram();
   if (!fH) return kFALSE;
 
   fH->GetZaxis()->SetLimits(fH->GetMinimum(), fH->GetMaximum());
 
   if (dynamic_cast<TF3*>(fM))
      SetPainter( new TGLTF3Painter((TF3*)fM, fH, 0, &fCoord) );
   else
      SetPainter( new TGLSurfacePainter(fH, 0, &fCoord) );
 
   if (option.Index("sph") != kNPOS)
      fCoord.SetCoordType(kGLSpherical);
   else if (option.Index("pol") != kNPOS)
      fCoord.SetCoordType(kGLPolar);
   else if (option.Index("cyl") != kNPOS)
      fCoord.SetCoordType(kGLCylindrical);
 
   fPlotPainter->AddOption(option);
   fPlotPainter->InitGeometry();
 
   return kTRUE;
}
 
////////////////////////////////////////////////////////////////////////////////
/// Setup bounding-box.
 
void TF2GL::SetBBox()
{
   fBoundingBox.Set(fPlotPainter->RefBackBox().Get3DBox());
}
 
////////////////////////////////////////////////////////////////////////////////
/// Render the object.
 
void TF2GL::DirectDraw(TGLRnrCtx & rnrCtx) const
{
   fPlotPainter->RefBackBox().FindFrontPoint();
 
   glPushAttrib(GL_ENABLE_BIT | GL_LIGHTING_BIT);
 
   glEnable(GL_NORMALIZE);
   glDisable(GL_COLOR_MATERIAL);
 
   fPlotPainter->InitGL();
   fPlotPainter->DrawPlot();
 
   glDisable(GL_CULL_FACE);
   glPopAttrib();
 
   // Axes
   TGLAxisPainterBox axe_painter;
   axe_painter.SetUseAxisColors(kFALSE);
   axe_painter.SetFontMode(TGLFont::kPixmap);
   axe_painter.PlotStandard(rnrCtx, fH, fBoundingBox);
}