Geant4  10.02.p02
G4RayTracerViewer.cc
Go to the documentation of this file.
1 //
2 // ********************************************************************
3 // * License and Disclaimer *
4 // * *
5 // * The Geant4 software is copyright of the Copyright Holders of *
6 // * the Geant4 Collaboration. It is provided under the terms and *
7 // * conditions of the Geant4 Software License, included in the file *
8 // * LICENSE and available at http://cern.ch/geant4/license . These *
9 // * include a list of copyright holders. *
10 // * *
11 // * Neither the authors of this software system, nor their employing *
12 // * institutes,nor the agencies providing financial support for this *
13 // * work make any representation or warranty, express or implied, *
14 // * regarding this software system or assume any liability for its *
15 // * use. Please see the license in the file LICENSE and URL above *
16 // * for the full disclaimer and the limitation of liability. *
17 // * *
18 // * This code implementation is the result of the scientific and *
19 // * technical work of the GEANT4 collaboration. *
20 // * By using, copying, modifying or distributing the software (or *
21 // * any work based on the software) you agree to acknowledge its *
22 // * use in resulting scientific publications, and indicate your *
23 // * acceptance of all terms of the Geant4 Software license. *
24 // ********************************************************************
25 //
26 //
27 // $Id: G4RayTracerViewer.cc 74050 2013-09-20 09:38:19Z gcosmo $
28 
29 #include "G4RayTracerViewer.hh"
30 
31 #include "G4ios.hh"
32 #include <sstream>
33 #include "G4SystemOfUnits.hh"
34 
35 #include "G4VSceneHandler.hh"
36 #include "G4Scene.hh"
37 #include "G4TheRayTracer.hh"
38 #include "G4UImanager.hh"
39 
40 #ifdef G4MULTITHREADED
41 #include "G4TheMTRayTracer.hh"
42 #endif
43 
45 (G4VSceneHandler& sceneHandler,
46  const G4String& name,
47  G4TheRayTracer* aTracer):
48  G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name),
49  fFileCount(0)
50 {
51  theTracer = aTracer;
52 #ifdef G4MULTITHREADED
53  if (!aTracer) theTracer = G4TheMTRayTracer::theInstance;
54  if (!theTracer) theTracer = new G4TheMTRayTracer;
55 #else
56  if (!aTracer) theTracer = new G4TheRayTracer;
57 #endif
58  theTracer->SetNColumn(fVP.GetWindowSizeHintX());
59  theTracer->SetNRow(fVP.GetWindowSizeHintY());
60 }
61 
63 
65 {
66  // Get radius of scene, etc. (See G4OpenGLViewer::SetView().)
67  // Note that this procedure properly takes into account zoom, dolly and pan.
68  const G4Point3D& targetPoint
71  G4double radius = // See G4ViewParameters for following procedure.
73  if(radius<=0.) radius = 1.;
74  const G4double cameraDistance = fVP.GetCameraDistance(radius);
75  const G4Point3D cameraPosition =
76  targetPoint + cameraDistance * fVP.GetViewpointDirection().unit();
77  const G4double nearDistance = fVP.GetNearDistance(cameraDistance,radius);
78  const G4double frontHalfHeight = fVP.GetFrontHalfHeight(nearDistance,radius);
79  const G4double frontHalfAngle = std::atan(frontHalfHeight / nearDistance);
80 
81  // Calculate and set ray tracer parameters.
82  theTracer->
83  SetViewSpan(200. * frontHalfAngle / theTracer->GetNColumn());
84  theTracer->SetTargetPosition(targetPoint);
85  theTracer->SetEyePosition(cameraPosition);
87  const G4Vector3D
88  actualLightpointDirection(-fVP.GetActualLightpointDirection());
89  theTracer->SetLightDirection(actualLightpointDirection);
91 }
92 
93 
95 
97 {
98  // Trap recursive call
99  static G4bool called = false;
100  if (called) return;
101  called = true;
102 
103  if (fVP.GetFieldHalfAngle() == 0.) { // Orthogonal (parallel) projection.
104  G4double fieldHalfAngle = perMillion;
105  fVP.SetFieldHalfAngle(fieldHalfAngle);
106  G4cout <<
107  "WARNING: G4RayTracerViewer::DrawView: true orthogonal projection"
108  "\n not yet implemented. Doing a \"long shot\", i.e., a perspective"
109  "\n projection with a half field angle of "
110  << fieldHalfAngle <<
111  " radians."
112  << G4endl;
113  SetView(); // Special graphics system - bypass ProcessView().
115  }
116  else {
117  SetView(); // Special graphics system - bypass ProcessView().
118  }
119  std::ostringstream filename;
120  filename << "g4RayTracer." << fShortName << '_' << fFileCount++ << ".jpeg";
121  theTracer->Trace(filename.str());
122 
123  // Reset call flag
124  called = false;
125 }
void SetLightDirection(const G4ThreeVector &val)
const G4Colour & GetBackgroundColour() const
G4Vector3D & GetActualLightpointDirection()
G4RayTracerViewer(G4VSceneHandler &, const G4String &name, G4TheRayTracer *=0)
G4int GetNColumn() const
G4String name
Definition: TRTMaterials.hh:40
G4int IncrementViewCount()
virtual ~G4RayTracerViewer()
HepGeom::Point3D< G4double > G4Point3D
Definition: G4Point3D.hh:35
HepGeom::Vector3D< G4double > G4Vector3D
Definition: G4Vector3D.hh:35
void SetNColumn(G4int val)
G4double GetCameraDistance(G4double radius) const
const G4Point3D & GetCurrentTargetPoint() const
G4double GetNearDistance(G4double cameraDistance, G4double radius) const
G4double GetExtentRadius() const
Definition: G4VisExtent.cc:73
virtual void Trace(const G4String &fileName)
const G4Vector3D & GetViewpointDirection() const
G4GLOB_DLL std::ostream G4cout
const G4VisExtent & GetExtent() const
const G4Point3D & GetStandardTargetPoint() const
bool G4bool
Definition: G4Types.hh:79
G4double GetFrontHalfHeight(G4double nearDistance, G4double radius) const
void SetFieldHalfAngle(G4double fieldHalfAngle)
void SetUpVector(const G4ThreeVector &val)
G4ViewParameters fVP
Definition: G4VViewer.hh:160
static const double perMillion
Definition: G4SIunits.hh:331
G4Scene * GetScene() const
void SetBackgroundColour(const G4Colour &val)
G4TheRayTracer * theTracer
#define G4endl
Definition: G4ios.hh:61
G4double GetFieldHalfAngle() const
static G4TheMTRayTracer * theInstance
G4String fShortName
Definition: G4VViewer.hh:159
double G4double
Definition: G4Types.hh:76
void SetEyePosition(const G4ThreeVector &val)
const G4Vector3D & GetUpVector() const
G4VSceneHandler & fSceneHandler
Definition: G4VViewer.hh:156
void SetTargetPosition(const G4ThreeVector &val)