Gabriele Cosmo
75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
// This code implementation is the intellectual property of
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// the GEANT4 collaboration.
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//
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// By copying, distributing or modifying the Program (or any work
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// based on the Program) you indicate your acceptance of this statement,
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// and all its terms.
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//
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// $Id: G4RayTracerViewer.cc,v 1.6 2000/05/13 10:55:56 johna Exp $
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// GEANT4 tag $Name: geant4-03-01 $
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#include "G4RayTracerViewer.hh"
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#include "G4ios.hh"
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#include "g4std/strstream"
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#include "G4VSceneHandler.hh"
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#include "G4Scene.hh"
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#include "G4RayTracer.hh"
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#include "G4UImanager.hh"
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G4RayTracerViewer::G4RayTracerViewer
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(G4VSceneHandler& sceneHandler, const G4String& name):
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fFileCount(0),
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G4VViewer(sceneHandler, sceneHandler.IncrementViewCount(), name) {}
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G4RayTracerViewer::~G4RayTracerViewer() {}
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void G4RayTracerViewer::SetView() {
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G4RayTracer* theTracer =
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(G4RayTracer*) fSceneHandler.GetGraphicsSystem();
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// Get radius of scene, etc. (See G4OpenGLViewer::SetView().)
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// Note that this procedure properly takes into account zoom, dolly and pan.
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const G4Point3D& targetPoint
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= fSceneHandler.GetScene()->GetStandardTargetPoint()
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+ fVP.GetCurrentTargetPoint();
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G4double radius = // See G4ViewParameters for following procedure.
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fSceneHandler.GetScene()->GetExtent().GetExtentRadius();
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if(radius<=0.) radius = 1.;
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const G4double cameraDistance = fVP.GetCameraDistance(radius);
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const G4Point3D cameraPosition =
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targetPoint + cameraDistance * fVP.GetViewpointDirection().unit();
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const G4double nearDistance = fVP.GetNearDistance(cameraDistance,radius);
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const G4double frontHalfHeight = fVP.GetFrontHalfHeight(nearDistance,radius);
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const G4double frontHalfAngle = atan(frontHalfHeight / nearDistance);
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// Calculate and set ray tracer parameters.
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theTracer->
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SetViewSpan(200. * frontHalfAngle / theTracer->GetNColumn());
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theTracer->SetTargetPosition(targetPoint);
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theTracer->SetEyePosition(cameraPosition);
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theTracer->SetHeadAngle(fVP.GetViewpointDirection().phi());
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theTracer->SetLightDirection(-fVP.GetActualLightpointDirection());
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}
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void G4RayTracerViewer::ClearView() {}
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void G4RayTracerViewer::DrawView() {
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if (fVP.GetFieldHalfAngle() == 0.) { // Orthogonal (parallel) projection.
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G4cout <<
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"G4RayTracerViewer::SetView: orthogonal projection not yet implemented."
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<< G4endl;
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return;
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}
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SetView(); // Special graphics system - bypass ProcessView().
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G4RayTracer* theTracer =
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(G4RayTracer*) fSceneHandler.GetGraphicsSystem();
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char fileName [100];
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G4std::ostrstream ost(fileName, 100);
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ost << "g4RayTracer." << fShortName << '_' << fFileCount++ << ".jpeg"
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<< G4std::ends;
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theTracer->Trace(fileName);
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}
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