G4OpenGLStoredXViewer.cc

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// Andrew Walkden  7th February 1997
// Class G4OpenGLStoredXViewer : a class derived from G4OpenGLXViewer and
//                             G4OpenGLStoredViewer.
 
#include "G4OpenGLStoredXViewer.hh"
 
#include "G4OpenGLStoredSceneHandler.hh"
#include "G4ios.hh"
#include "G4Threading.hh"
 
G4OpenGLStoredXViewer::
G4OpenGLStoredXViewer (G4OpenGLStoredSceneHandler& sceneHandler,
         const G4String& name)
 : G4VViewer (sceneHandler, sceneHandler.IncrementViewCount (), name),
   G4OpenGLViewer (sceneHandler),
   G4OpenGLXViewer (sceneHandler),
   G4OpenGLStoredViewer (sceneHandler)
{
  if (fViewId < 0) return;  // In case error in base class instantiation.
 
  if (!vi_stored) {
    fViewId = -1;  // This flags an error.
    G4cerr << "G4OpenGLStoredXViewer::G4OpenGLStoredXViewer -"
      " G4OpenGLXViewer couldn't get a visual." << G4endl;
    return;
  }
}
 
G4OpenGLStoredXViewer::~G4OpenGLStoredXViewer () {}
 
void G4OpenGLStoredXViewer::Initialise () {
 
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredXViewer::Initialise\n");
#endif
  CreateGLXContext (vi_stored);
  CreateMainWindow ();
  CreateFontLists ();
 
  InitializeGLView ();
 
  glDrawBuffer (GL_BACK);
}
 
void G4OpenGLStoredXViewer::DrawView () {
 
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredXViewer::DrawView\n");
#endif
 
  G4ViewParameters::DrawingStyle style = GetViewParameters().GetDrawingStyle();
 
  // See if things have changed from last time and remake if necessary...
  // The fNeedKernelVisit flag might have been set by the user in
  // /vis/viewer/rebuild, but if not, make decision and set flag only
  // if necessary...
  if (!fNeedKernelVisit) KernelVisitDecision ();
  fLastVP = fVP;
  G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).
  ProcessView ();
 
  if(style!=G4ViewParameters::hlr && haloing_enabled) {
 
    HaloingFirstPass ();
    DrawDisplayLists ();
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredXViewer::DrawView flush \n");
#endif
    glFlush ();
 
    HaloingSecondPass ();
 
    DrawDisplayLists ();
 
  } else {
 
    if (!kernelVisitWasNeeded) {
#ifdef G4DEBUG_VIS_OGL
      printf("G4OpenGLStoredXViewer::DrawView NO need kernel visit\n");
#endif
      DrawDisplayLists ();
 
    } else {
 
#ifdef G4DEBUG_VIS_OGL
      printf("G4OpenGLStoredXViewer::DrawView NEED kernel visit\n");
#endif
    // However, union cutaways are implemented in DrawDisplayLists, so make
    // an extra pass...
      if (fVP.IsCutaway() &&
      fVP.GetCutawayMode() == G4ViewParameters::cutawayUnion) {
    ClearView();
    DrawDisplayLists ();
      } else { // ADD TO AVOID KernelVisit=1 and nothing to display
        DrawDisplayLists ();
      }
    }
  }
 
  FinishView ();
 
}
 
void G4OpenGLStoredXViewer::FinishView () {
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredXViewer::FinishView\n");
#endif
 
//  glXWaitGL (); //Wait for effects of all previous OpenGL commands to
                //be propagated before progressing.
// JA: Commented out July 2021 - slows rendering down in some cases and I
// don't see any adverse effects.
 
#ifdef G4DEBUG_VIS_OGL
  printf("G4OpenGLStoredXViewer::FinishView flush \n");
#endif
  glFlush (); //FIXME
 
  GLint renderMode;
  glGetIntegerv(GL_RENDER_MODE, &renderMode);
  if (renderMode == GL_RENDER) glXSwapBuffers (dpy, win);  
}