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G4VRML2FileViewer.cc
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27 // $Id: G4VRML2FileViewer.cc 77479 2013-11-25 10:01:22Z gcosmo $
28 //
29 // G4VRML2FileViewer.cc
30 // Satoshi Tanaka & Yasuhide Sawada
31 
32 
33 //#define DEBUG_FR_VIEW
34 
35 #include <cmath>
36 
37 #include "G4VisManager.hh"
38 #include "G4Scene.hh"
39 #include "G4VRML2FileViewer.hh"
41 #include "G4VRML2File.hh"
42 #include "G4SystemOfUnits.hh"
43 #include "G4ios.hh"
44 
46  const G4String& name) :
47  G4VViewer(sceneHandler,
48  sceneHandler.IncrementViewCount(),
49  name),
50  fSceneHandler(sceneHandler),
51  fDest(sceneHandler.fDest)
52 {
53  fViewHalfAngle = 30. * deg;
54  fsin_VHA = std::sin ( fViewHalfAngle ) ;
55 }
56 
58 {}
59 
60 void G4VRML2FileViewer::SetView()
61 {
62 #if defined DEBUG_FR_VIEW
64  G4cout << "***** G4VRML2FileViewer::SetView(): No effects" << G4endl;
65 #endif
66 
67 // Do nothing, since VRML a browser is running as a different process.
68 // SendViewParameters () will do this job instead.
69 
70 }
71 
73 {
74 #if defined DEBUG_FR_VIEW
76  G4cout << "***** G4VRML2FileViewer::DrawView()" << G4endl;
77 #endif
78 
79  fSceneHandler.VRMLBeginModeling() ;
80 
81  // Viewpoint node
82  SendViewParameters();
83 
84  // Here is a minimal DrawView() function.
86  ProcessView();
87  FinishView();
88 }
89 
91 {
92 #if defined DEBUG_FR_VIEW
94  G4cout << "***** G4VRML2File1View::ClearView()" << G4endl;
95 #endif
96  if(fSceneHandler.fFlagDestOpen) {
97  fSceneHandler.fDest.close();
98  // Re-open with same filename...
99  fSceneHandler.fDest.open(fSceneHandler.fVRMLFileName);
100  fSceneHandler.fDest << "#VRML V2.0 utf8" << "\n";
101  fSceneHandler.fDest << "# Generated by VRML 2.0 driver of GEANT4\n" << "\n";
102  }
103 }
104 
106 {
107 #if defined DEBUG_FR_VIEW
109  G4cout << "***** G4VRML2FileViewer::ShowView()" << G4endl;
110 #endif
111  fSceneHandler.VRMLEndModeling();
112 }
113 
115 {
116 #if defined DEBUG_FR_VIEW
118  G4cout << "***** G4VRML2FileViewer::FinishView(): No effects" << G4endl;
119 #endif
120 }
121 
122 void G4VRML2FileViewer::SendViewParameters ()
123 {
124  // Calculates view representation based on extent of object being
125  // viewed and (initial) direction of camera. (Note: it can change
126  // later due to user interaction via visualization system's GUI.)
127 
128 #if defined DEBUG_FR_VIEW
130  G4cout << "***** G4VRML2FileViewer::SendViewParameters()\n";
131 #endif
132 
133  // error recovery
134  if ( fsin_VHA < 1.0e-6 ) { return ; }
135 
136  // camera distance
137  G4double extent_radius = fSceneHandler.GetScene()->GetExtent().GetExtentRadius();
138  G4double camera_distance = extent_radius / fsin_VHA ;
139 
140  // camera position on Z axis
141  const G4Point3D& target_point
142  = fSceneHandler.GetScene()->GetStandardTargetPoint()
144  G4double E_z = target_point.z() + camera_distance;
145  G4Point3D E(0.0, 0.0, E_z );
146 
147  // VRML codes are generated below
148  fDest << G4endl;
149  fDest << "#---------- CAMERA" << G4endl;
150  fDest << "Viewpoint {" << G4endl;
151  fDest << "\t" << "position " ;
152  fDest << E.x() << " " ;
153  fDest << E.y() << " " ;
154  fDest << E.z() << G4endl ;
155  fDest << "}" << G4endl;
156  fDest << G4endl;
157 
158 }
const XML_Char * name
Definition: expat.h:151
virtual ~G4VRML2FileViewer()
const G4Point3D & GetCurrentTargetPoint() const
G4double GetExtentRadius() const
Definition: G4VisExtent.cc:73
G4GLOB_DLL std::ostream G4cout
const G4VisExtent & GetExtent() const
const G4Point3D & GetStandardTargetPoint() const
G4ViewParameters fVP
Definition: G4VViewer.hh:205
G4VRML2FileViewer(G4VRML2FileSceneHandler &scene, const G4String &name="")
G4Scene * GetScene() const
static Verbosity GetVerbosity()
void NeedKernelVisit()
Definition: G4VViewer.cc:78
#define G4endl
Definition: G4ios.hh:61
void ProcessView()
Definition: G4VViewer.cc:105
double G4double
Definition: G4Types.hh:76
static constexpr double deg
Definition: G4SIunits.hh:152