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G4XXXStoredViewer.cc
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27 // $Id: G4XXXStoredViewer.cc 95225 2016-02-01 09:15:32Z gcosmo $
28 //
29 //
30 // John Allison 7th March 2006
31 // A template for a graphics driver with a store/database.
32 //?? Lines beginning like this require specialisation for your driver.
33 
34 #include "G4XXXStoredViewer.hh"
35 
36 #include "G4VSceneHandler.hh"
38 
39 #include <fstream>
40 #include <sstream>
41 
43 (G4VSceneHandler& sceneHandler, const G4String& name):
44  G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name)
45 {}
46 
48 
50 #ifdef G4XXXStoredDEBUG
51  G4cout << "G4XXXStoredViewer::SetView() called." << G4endl;
52 #endif
53 }
54 
56 #ifdef G4XXXStoredDEBUG
57  G4cout << "G4XXXStoredViewer::ClearView() called." << G4endl;
58 #endif
59 }
60 
62 #ifdef G4XXXStoredDEBUG
63  G4cout << "G4XXXStoredViewer::DrawView() called." << G4endl;
64 #endif
65 
66  // First, a view should decide when to re-visit the G4 kernel.
67  // Sometimes it might not be necessary, e.g., if the scene is stored
68  // in a graphical database (e.g., OpenGL's display lists) and only
69  // the viewing angle has changed. But graphics systems without a
70  // graphical database will always need to visit the G4 kernel.
71 
72  // The fNeedKernelVisit flag might have been set by the user in
73  // /vis/viewer/rebuild, but if not, make decision and set flag only
74  // if necessary...
76  G4bool kernelVisitWasNeeded = fNeedKernelVisit; // Keep (ProcessView resets).
77 
78  ProcessView (); // Clears store and processes scene only if necessary.
79 
80  if (kernelVisitWasNeeded) {
81  // Some systems, notably OpenGL, can draw while re-building, so
82  // there might not be a need to draw from store again here. But
83  // in this case...
84  DrawFromStore();
85  } else {
86  DrawFromStore();
87  }
88 
89  // ...before finally...
90  FinishView (); // Flush streams and/or swap buffers.
91 }
92 
94 #ifdef G4XXXStoredDEBUG
95  G4cout << "G4XXXStoredViewer::ShowView() called." << G4endl;
96 #endif
97 }
98 
100 
101  // If there's a significant difference with the last view parameters
102  // of either the scene handler or this viewer, trigger a rebuild.
103 
104  typedef std::list<G4String> Store;
105  Store& store =
106  static_cast<G4XXXStoredSceneHandler&>(fSceneHandler).fStore;
107  if (store.empty() || CompareForKernelVisit(fLastVP)) {
108  NeedKernelVisit (); // Sets fNeedKernelVisit.
109  }
110  fLastVP = fVP;
111 }
112 
114 {
115  // Typical comparison. Taken from OpenGL.
116  if (
117  (lastVP.GetDrawingStyle () != fVP.GetDrawingStyle ()) ||
118  (lastVP.IsAuxEdgeVisible () != fVP.IsAuxEdgeVisible ()) ||
119  (lastVP.IsCulling () != fVP.IsCulling ()) ||
120  (lastVP.IsCullingInvisible () != fVP.IsCullingInvisible ()) ||
121  (lastVP.IsDensityCulling () != fVP.IsDensityCulling ()) ||
122  (lastVP.IsCullingCovered () != fVP.IsCullingCovered ()) ||
123  // No need to visit kernel if section plane changes.
124  // No need to visit kernel if cutaway planes change.
125  (lastVP.IsExplode () != fVP.IsExplode ()) ||
126  (lastVP.GetNoOfSides () != fVP.GetNoOfSides ()) ||
127  (lastVP.IsMarkerNotHidden () != fVP.IsMarkerNotHidden ()) ||
128  (lastVP.GetDefaultVisAttributes()->GetColour() !=
130  (lastVP.GetDefaultTextVisAttributes()->GetColour() !=
132  (lastVP.GetBackgroundColour ()!= fVP.GetBackgroundColour ())||
133  (lastVP.GetVisAttributesModifiers() !=
135  ) {
136  return true;
137  }
138 
139  if (lastVP.IsDensityCulling () &&
140  (lastVP.GetVisibleDensity () != fVP.GetVisibleDensity ()))
141  return true;
142 
143  if (lastVP.IsExplode () &&
144  (lastVP.GetExplodeFactor () != fVP.GetExplodeFactor ()))
145  return true;
146 
147  return false;
148 }
149 
151  typedef std::list<G4String> Store;
152  typedef std::list<G4String>::iterator StoreIterator;
153  Store& store =
154  static_cast<G4XXXStoredSceneHandler&>(fSceneHandler).fStore;
155  // Write to a file for testing...
156  static G4int iCount = 0;
157  std::ostringstream oss;
158  oss << fName << '.' << iCount++ << ".out";
159  std::ofstream ofs(oss.str().c_str());
160  for (StoreIterator i = store.begin(); i != store.end(); ++i) {
161  ofs << *i;
162  }
163  ofs.close();
164 }
const XML_Char * name
Definition: expat.h:151
const G4Colour & GetBackgroundColour() const
G4XXXStoredViewer(G4VSceneHandler &, const G4String &name)
G4double GetVisibleDensity() const
G4bool IsCullingInvisible() const
G4double GetExplodeFactor() const
G4int IncrementViewCount()
const G4Colour & GetColour() const
G4bool IsDensityCulling() const
int G4int
Definition: G4Types.hh:78
const std::vector< G4ModelingParameters::VisAttributesModifier > & GetVisAttributesModifiers() const
G4GLOB_DLL std::ostream G4cout
G4bool IsAuxEdgeVisible() const
virtual ~G4XXXStoredViewer()
bool G4bool
Definition: G4Types.hh:79
G4bool IsCullingCovered() const
G4ViewParameters fVP
Definition: G4VViewer.hh:205
G4bool fNeedKernelVisit
Definition: G4VViewer.hh:210
const G4VisAttributes * GetDefaultTextVisAttributes() const
G4bool IsExplode() const
G4bool CompareForKernelVisit(G4ViewParameters &)
G4bool IsMarkerNotHidden() const
G4String fName
Definition: G4VViewer.hh:203
G4int GetNoOfSides() const
void NeedKernelVisit()
Definition: G4VViewer.cc:78
DrawingStyle GetDrawingStyle() const
#define G4endl
Definition: G4ios.hh:61
void ProcessView()
Definition: G4VViewer.cc:105
const G4VisAttributes * GetDefaultVisAttributes() const
G4VSceneHandler & fSceneHandler
Definition: G4VViewer.hh:201
G4ViewParameters fLastVP
G4bool IsCulling() const
virtual void FinishView()
Definition: G4VViewer.cc:101