G4XXXSGViewer Class Reference

#include <G4XXXSGViewer.hh>

Inheritance diagram for G4XXXSGViewer:

Public Member Functions
	G4XXXSGViewer (G4VSceneHandler &, const G4String &name)
virtual	~G4XXXSGViewer ()
void	SetView ()
void	ClearView ()
void	DrawView ()
void	ShowView ()
Protected Member Functions
void	KernelVisitDecision ()
G4bool	CompareForKernelVisit (G4ViewParameters &)
void	DrawFromStore (const G4String &source)
Protected Attributes
G4ViewParameters	fLastVP

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Detailed Description

Definition at line 39 of file G4XXXSGViewer.hh.

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Constructor & Destructor Documentation

G4XXXSGViewer::G4XXXSGViewer	(	G4VSceneHandler &	,
		const G4String &	name
	)

Definition at line 42 of file G4XXXSGViewer.cc.

                                                     :
  G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name)
{}

G4XXXSGViewer::~G4XXXSGViewer

(

)

[virtual]

Definition at line 46 of file G4XXXSGViewer.cc.

{}

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Member Function Documentation

void G4XXXSGViewer::ClearView

(

)

[virtual]

Implements G4VViewer.

Definition at line 54 of file G4XXXSGViewer.cc.

References G4cout, and G4endl.

                              {
  //#ifdef G4XXXSGDEBUG
  G4cout << "G4XXXSGViewer::ClearView() called." << G4endl;
  //#endif
}

G4bool G4XXXSGViewer::CompareForKernelVisit

(

G4ViewParameters &

)

[protected]

Definition at line 115 of file G4XXXSGViewer.cc.

References G4VViewer::fVP, G4ViewParameters::GetBackgroundColour(), G4VisAttributes::GetColour(), G4ViewParameters::GetDefaultTextVisAttributes(), G4ViewParameters::GetDefaultVisAttributes(), G4ViewParameters::GetDrawingStyle(), G4ViewParameters::GetExplodeFactor(), G4ViewParameters::GetNoOfSides(), G4ViewParameters::GetRepStyle(), G4ViewParameters::GetVisAttributesModifiers(), G4ViewParameters::GetVisibleDensity(), G4ViewParameters::IsAuxEdgeVisible(), G4ViewParameters::IsCulling(), G4ViewParameters::IsCullingCovered(), G4ViewParameters::IsCullingInvisible(), G4ViewParameters::IsDensityCulling(), G4ViewParameters::IsExplode(), and G4ViewParameters::IsMarkerNotHidden().

Referenced by KernelVisitDecision().

{
  // Typical comparison.  Taken from OpenGL.
  if (
      (lastVP.GetDrawingStyle ()    != fVP.GetDrawingStyle ())    ||
      (lastVP.IsAuxEdgeVisible ()   != fVP.IsAuxEdgeVisible ())   ||
      (lastVP.GetRepStyle ()        != fVP.GetRepStyle ())        ||
      (lastVP.IsCulling ()          != fVP.IsCulling ())          ||
      (lastVP.IsCullingInvisible () != fVP.IsCullingInvisible ()) ||
      (lastVP.IsDensityCulling ()   != fVP.IsDensityCulling ())   ||
      (lastVP.IsCullingCovered ()   != fVP.IsCullingCovered ())   ||
      // No need to visit kernel if section plane changes.
      // No need to visit kernel if cutaway planes change.
      (lastVP.IsExplode ()          != fVP.IsExplode ())          ||
      (lastVP.GetNoOfSides ()       != fVP.GetNoOfSides ())       ||
      (lastVP.IsMarkerNotHidden ()  != fVP.IsMarkerNotHidden ())  ||
      (lastVP.GetDefaultVisAttributes()->GetColour() !=
       fVP.GetDefaultVisAttributes()->GetColour())                ||
      (lastVP.GetDefaultTextVisAttributes()->GetColour() !=
       fVP.GetDefaultTextVisAttributes()->GetColour())            ||
      (lastVP.GetBackgroundColour ()!= fVP.GetBackgroundColour ())||
      (lastVP.GetVisAttributesModifiers().size() !=
       fVP.GetVisAttributesModifiers().size())
      ) {
    return true;
  }

  if (lastVP.IsDensityCulling () &&
      (lastVP.GetVisibleDensity () != fVP.GetVisibleDensity ()))
    return true;

  if (lastVP.IsExplode () &&
      (lastVP.GetExplodeFactor () != fVP.GetExplodeFactor ()))
    return true;

  return false;
}

void G4XXXSGViewer::DrawFromStore

(

const G4String &

source

)

[protected]

Definition at line 153 of file G4XXXSGViewer.cc.

References G4VViewer::fName, G4VViewer::fSceneHandler, G4cout, G4endl, and JA::PrintTree().

Referenced by DrawView(), and ShowView().

                                                        {
  SceneGraph& sceneGraph =
    static_cast<G4XXXSGSceneHandler&>(fSceneHandler).fSceneGraph;
  // Write to a file for testing...
  static G4int iCount = 0;
  std::ostringstream oss;
  oss << source << '.' << fName << '.' << iCount++ << ".out";
  G4cout << "Writing " << oss.str() << G4endl;
  std::ofstream ofs(oss.str().c_str());
  JA::PrintTree(ofs,&sceneGraph);
  ofs.close();
}

void G4XXXSGViewer::DrawView

(

)

[virtual]

Implements G4VViewer.

Definition at line 60 of file G4XXXSGViewer.cc.

References DrawFromStore(), G4VViewer::FinishView(), G4VViewer::fNeedKernelVisit, G4cout, G4endl, KernelVisitDecision(), and G4VViewer::ProcessView().

                             {
  //#ifdef G4XXXSGDEBUG
  G4cout << "G4XXXSGViewer::DrawView() called." << G4endl;
  //#endif

  // First, a view should decide when to re-visit the G4 kernel.
  // Sometimes it might not be necessary, e.g., if the scene is stored
  // in a graphical database (e.g., OpenGL's display lists) and only
  // the viewing angle has changed.  But graphics systems without a
  // graphical database will always need to visit the G4 kernel.

  // 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();
  G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).

  ProcessView ();  // Clears store and processes scene only if necessary.

  if (kernelVisitWasNeeded) {
    // Some systems, notably OpenGL, can draw while re-building, so
    // there might not be a need to draw from store again here.  But
    // in this case...
    DrawFromStore("G4XXXSGViewer::DrawView");
  } else {
    DrawFromStore("G4XXXSGViewer::DrawView");
  }

  // ...before finally...
  FinishView ();       // Flush streams and/or swap buffers.
}

void G4XXXSGViewer::KernelVisitDecision

(

)

[protected]

Definition at line 100 of file G4XXXSGViewer.cc.

References CompareForKernelVisit(), JA::Node::fDaughters, fLastVP, G4VViewer::fSceneHandler, G4VViewer::fVP, and G4VViewer::NeedKernelVisit().

Referenced by DrawView().

                                         {
  
  // If there's a significant difference with the last view parameters
  // of either the scene handler or this viewer, trigger a rebuild.

  SceneGraph& sceneGraph =
    static_cast<G4XXXSGSceneHandler&>(fSceneHandler).fSceneGraph;
  if (sceneGraph.fDaughters.size() == 3  // I.e., only the root nodes.
      // (The above needs re-thinking.)
      || CompareForKernelVisit(fLastVP)) {
    NeedKernelVisit ();  // Sets fNeedKernelVisit.
  }      
  fLastVP = fVP;
}

void G4XXXSGViewer::SetView

(

)

[virtual]

Implements G4VViewer.

Definition at line 48 of file G4XXXSGViewer.cc.

References G4cout, and G4endl.

                            {
  //#ifdef G4XXXSGDEBUG
  G4cout << "G4XXXSGViewer::SetView() called." << G4endl;
  //#endif
}

void G4XXXSGViewer::ShowView

(

)

[virtual]

Reimplemented from G4VViewer.

Definition at line 92 of file G4XXXSGViewer.cc.

References DrawFromStore(), G4cout, and G4endl.

                             {
  //#ifdef G4XXXSGDEBUG
  G4cout << "G4XXXSGViewer::ShowView() called." << G4endl;
  //#endif
  // This is what you should see...
  DrawFromStore("G4XXXSGViewer::ShowView");
}

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Field Documentation

G4ViewParameters G4XXXSGViewer::fLastVP [protected]

Definition at line 51 of file G4XXXSGViewer.hh.

Referenced by KernelVisitDecision().

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The documentation for this class was generated from the following files:

• G4XXXSGViewer.hh
• G4XXXSGViewer.cc

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