Gabriele Cosmo
257 lines
9.6 KiB
C++
257 lines
9.6 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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//
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// John Allison 27th March 1996
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//
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// Class description
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//
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// Abstract interface class for graphics viewers.
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#ifndef G4VVIEWER_HH
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#define G4VVIEWER_HH
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#include "globals.hh"
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#include "G4ViewParameters.hh"
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#include "G4PhysicalVolumeModel.hh"
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class G4VSceneHandler;
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class G4VViewer {
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public: // With description
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friend std::ostream& operator << (std::ostream& os, const G4VViewer& v);
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G4VViewer (G4VSceneHandler&, G4int id, const G4String& name = "");
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virtual ~G4VViewer ();
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virtual void Initialise ();
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// Called immediately after construction for those operations that
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// must await complete contruction of viewer and all its bases. For
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// example, if this class (G4VViewer) is inherited virtually, as in
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// the OpenGL sub-category, it will not be fully constructed until
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// *after* the the derived viewer (this is the rule about order of
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// construction for virtual inheritance), so the derived viewer may
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// not use information in G4VViewer in its contructor. Hence such
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// code must be in Initialise().
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//////////////////////////////////////////////////////////////
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// View manipulation functions.
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virtual void ResetView ();
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// Reset view parameters to default, including sub-class parameters, if any.
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// The sub-class should always invoke the base class implementation, i.e:
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// virtual void SubClass::ResetView () {
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// G4VViewer::ResetView();
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// // Then reset sub-class parameters
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// ...
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virtual void SetView () = 0;
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// Take view parameters and work out model/view transformation,
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// projection transformation, lighting, etc.
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virtual void ClearView () = 0;
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// Clear screen/viewing buffers.
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virtual void DrawView () = 0;
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// Draw view of the scene currently attached to the scene handler -
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// see example of a minimal function at end of this file.
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void RefreshView ();
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// Simply invokes SetView, ClearView, DrawView.
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virtual void ShowView ();
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// Show view (for graphics systems which require to process
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// all drawn objects before finalising the view).
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virtual void FinishView ();
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// Called at the end of drawing scene. Used to flush streams, or
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// swap buffers. (Perhaps it is inappropriately named, perhaps its
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// function could be incorporated into EndModeling (). It marks the
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// end of scene drawing; be aware hits and digi drawing may Follow.
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// It is not yet the end of all drawing; that is signalled by
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// ShowView ().)
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std::vector<G4ThreeVector> ComputeFlyThrough(G4Vector3D*);
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#ifdef G4MULTITHREADED
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// Note: the order of calling of MovingToVisSubThread and SwitchToVisSubThread
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// is undefined, so you may need to implement mutexes to ensure your preferred
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// order - see, e.g., G4OpenGLQtViewer. To summarise, the order of calling is
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// as follows - see G4VisManager.cc.
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// DoneWithMasterThread
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// MovingToVisSubThread ) or ( SwitchToVisSubThread
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// SwitchToVisSubThread ) ( MovingToVisSubThread
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// DoneWithVisSubThread
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// MovingToMasterThread
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// SwitchToMasterThread
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// Called on the master thread before starting the vis sub-thread.
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virtual void DoneWithMasterThread ();
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// Called on the master thread after starting the vis sub-thread.
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virtual void MovingToVisSubThread ();
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// Called on the vis sub-thread at start of vis sub-thread.
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virtual void SwitchToVisSubThread ();
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// Called on the vis sub-thread when all events have been processed.
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virtual void DoneWithVisSubThread ();
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// Called on the vis sub-thread when all events have been processed.
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virtual void MovingToMasterThread ();
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// Called on the master thread after the vis sub-thread has terminated.
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virtual void SwitchToMasterThread ();
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#endif
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//////////////////////////////////////////////////////////////
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// Access functions.
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const G4String& GetName () const;
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const G4String& GetShortName () const;
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void SetName (const G4String&);
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G4int GetViewId () const;
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G4VSceneHandler* GetSceneHandler () const;
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const G4ViewParameters& GetViewParameters () const;
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const G4ViewParameters& GetDefaultViewParameters () const;
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virtual const std::vector<G4ModelingParameters::VisAttributesModifier>*
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GetPrivateVisAttributesModifiers() const;
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// So that privately accumulated vis attributes modifiers may be
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// concatenated with the standard vis attributes modifiers for commands
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// such as /vis/viewer/set/all and /vis/viewer/save.
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void SetViewParameters (const G4ViewParameters& vp);
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void SetDefaultViewParameters (const G4ViewParameters& vp);
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//////////////////////////////////////////////////////////////
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// Public utility functions.
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const G4VisAttributes* GetApplicableVisAttributes
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(const G4VisAttributes*) const;
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void SetNeedKernelVisit (G4bool need);
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// Sets individual need-visit flag.
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void NeedKernelVisit ();
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// Flags all views the need to re-visit the GEANT4 kernel to refresh
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// the scene.
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void ProcessView ();
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// Used by DrawView (). Invokes SetView (). The basic logic is here.
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protected:
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//////////////////////////////////////////////////////////////
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// Protected utility functions.
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void SetTouchable
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(const std::vector<G4PhysicalVolumeModel::G4PhysicalVolumeNodeID>& fullPath);
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// Set the touchable for /vis/touchable/set/... commands.
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void TouchableSetVisibility
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(const std::vector<G4PhysicalVolumeModel::G4PhysicalVolumeNodeID>& fullPath,
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G4bool visibility);
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// Set the touchable visibility attribute.
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// Changes the Vis Attribute Modifiers WITHOUT triggering a rebuild.
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void TouchableSetColour
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(const std::vector<G4PhysicalVolumeModel::G4PhysicalVolumeNodeID>& fullPath,
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const G4Colour&);
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// Set the touchable colour attribute.
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// Changes the Vis Attribute Modifiers WITHOUT triggering a rebuild.
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class G4Spline
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{
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public:
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// Constructors and destructor
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G4Spline();
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~G4Spline();
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// Operations
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void AddSplinePoint(const G4Vector3D& v);
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G4Vector3D GetInterpolatedSplinePoint(float t); // t = 0...1; 0=vp[0] ... 1=vp[max]
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int GetNumPoints();
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G4Vector3D GetPoint(int);
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// method for computing the Catmull-Rom parametric equation
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// given a time (t) and a vector quadruple (p1,p2,p3,p4).
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G4Vector3D CatmullRom_Eq(float t, const G4Vector3D& p1, const G4Vector3D& p2,
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const G4Vector3D& p3, const G4Vector3D& p4);
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private:
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std::vector<G4Vector3D> vp;
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float delta_t;
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};
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//////////////////////////////////////////////////////////////
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// Data members
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G4VSceneHandler& fSceneHandler; // Abstract scene for this view.
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G4int fViewId; // Id of this instance.
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G4String fName;
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G4String fShortName; // Up to first ' ' character, if any.
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G4ViewParameters fVP; // View parameters.
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G4ViewParameters fDefaultVP; // Default view parameters.
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//////////////////////////////////////////////////////////////
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// Other parameters.
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G4bool fNeedKernelVisit; // See DrawView() for comments.
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};
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#include "G4VViewer.icc"
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/*********************************************
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Here is a minimal DrawView () as it might be implemented in the
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concrete viewer.
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void G4VViewer::DrawView () { // Default - concrete view usually overrides.
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// First, a view should decide when to re-visit the G4 kernel.
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// Sometimes it might not be necessary, e.g., if the scene is stored
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// in a graphical database (e.g., OpenGL's display lists) and only
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// the viewing angle has changed. But graphics systems without a
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// graphical database will always need to visit the G4 kernel.
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NeedKernelVisit (); // Default is - always visit G4 kernel.
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// Note: this routine sets the fNeedKernelVisit flag of *all* the views of
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// the scene.
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ProcessView (); // The basic logic is here.
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// Then a view may have more to do, e.g., display the graphical
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// database. That code should come here before finally...
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FinishView (); // Flush streams and/or swap buffers.
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}
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*********************************************/
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#endif
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