| Geant4 Cross Reference |
1 //
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24 // ********************************************************************
25 //
26 //
27
28 #include "G4RayTracerViewer.hh"
29
30 #include "G4ios.hh"
31 #include <sstream>
32 #include <iomanip>
33
34 #include "G4SystemOfUnits.hh"
35
36 #include "G4VSceneHandler.hh"
37 #include "G4Scene.hh"
38 #ifdef G4MULTITHREADED
39 #include "G4TheMTRayTracer.hh"
40 #else
41 #include "G4TheRayTracer.hh"
42 #endif
43 #include "G4RTJpegMaker.hh"
44 #include "G4RTSimpleScanner.hh"
45 #include "G4UImanager.hh"
46
47 #define G4warn G4cout
48
49 G4RayTracerViewer::G4RayTracerViewer
50 (G4VSceneHandler& sceneHandler,
51 const G4String& name,
52 G4TheRayTracer* aTracer)
53 : G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name)
54 , fFileCount(0)
55 #ifdef G4MULTITHREADED
56 #include "G4TheMTRayTracer.hh"
57 , theTracer(aTracer? aTracer: G4TheMTRayTracer::Instance(new G4RTJpegMaker, new G4RTSimpleScanner))
58 #else
59 , theTracer(aTracer? aTracer: new G4TheRayTracer(new G4RTJpegMaker, new G4RTSimpleScanner))
60 #endif
61 {
62 if (!theTracer) {
63 G4warn << "G4RayTracerViewer::Initialise: No tracer" << G4endl;
64 fViewId = -1; // This flags an error.
65 return;
66 }
67 }
68
69 G4RayTracerViewer::~G4RayTracerViewer() {}
70
71 void G4RayTracerViewer::Initialise()
72 {
73 theTracer->SetNColumn(fVP.GetWindowSizeHintX());
74 theTracer->SetNRow(fVP.GetWindowSizeHintY());
75 }
76
77 void G4RayTracerViewer::SetView()
78 {
79 // Get radius of scene, etc. (See G4OpenGLViewer::SetView().)
80 // Note that this procedure properly takes into account zoom, dolly and pan.
81 const G4Point3D& targetPoint
82 = fSceneHandler.GetScene()->GetStandardTargetPoint()
83 + fVP.GetCurrentTargetPoint();
84 G4double radius = // See G4ViewParameters for following procedure.
85 fSceneHandler.GetScene()->GetExtent().GetExtentRadius();
86 if(radius<=0.) radius = 1.;
87 const G4double cameraDistance = fVP.GetCameraDistance(radius);
88 const G4Point3D cameraPosition =
89 targetPoint + cameraDistance * fVP.GetViewpointDirection().unit();
90 const G4double nearDistance = fVP.GetNearDistance(cameraDistance,radius);
91 const G4double frontHalfHeight = fVP.GetFrontHalfHeight(nearDistance,radius);
92 const G4double frontHalfAngle = std::atan(frontHalfHeight / nearDistance);
93
94 // Calculate and set ray tracer parameters.
95 theTracer->
96 SetViewSpan(200. * frontHalfAngle / theTracer->GetNColumn());
97 theTracer->SetTargetPosition(targetPoint);
98 theTracer->SetEyePosition(cameraPosition);
99 theTracer->SetUpVector(fVP.GetUpVector());
100 const G4Vector3D
101 actualLightpointDirection(-fVP.GetActualLightpointDirection());
102 theTracer->SetLightDirection(actualLightpointDirection);
103 theTracer->SetBackgroundColour(fVP.GetBackgroundColour());
104 }
105
106
107 void G4RayTracerViewer::ClearView() {}
108
109 void G4RayTracerViewer::DrawView()
110 {
111 // Trap recursive call
112 static G4bool called = false;
113 if (called) return;
114 called = true;
115
116 if (fVP.GetFieldHalfAngle() == 0.) { // Orthogonal (parallel) projection.
117 G4double fieldHalfAngle = perMillion;
118 fVP.SetFieldHalfAngle(fieldHalfAngle);
119 G4warn <<
120 "WARNING: G4RayTracerViewer::DrawView: true orthogonal projection"
121 "\n not yet implemented. Doing a \"long shot\", i.e., a perspective"
122 "\n projection with a half field angle of "
123 << fieldHalfAngle <<
124 " radians."
125 << G4endl;
126 SetView(); // With this fieldHalfAngle
127 ProcessView();
128 fVP.SetFieldHalfAngle(0.);
129 }
130 else {
131 ProcessView();
132 }
133 std::ostringstream filename;
134 filename << "g4RayTracer." << fShortName << '_'
135 << std::setw(4) << std::setfill('0') << fFileCount++ << ".jpeg";
136 theTracer->Trace(filename.str());
137
138 // Reset call flag
139 called = false;
140 }
141