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G4OpenGLImmediateViewer.cc
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27 // $Id: G4OpenGLImmediateViewer.cc 66373 2012-12-18 09:41:34Z gcosmo $
28 //
29 //
30 // Andrew Walkden 7th February 1997
31 // Class G4OpenGLImmediateViewer : Encapsulates the `immediateness' of
32 // an OpenGL view, for inheritance by
33 // derived (X, Xm...) classes.
34 
35 #ifdef G4VIS_BUILD_OPENGL_DRIVER
36 
39 
40 G4OpenGLImmediateViewer::G4OpenGLImmediateViewer (G4OpenGLImmediateSceneHandler& scene):
41 G4VViewer (scene, -1),
42 G4OpenGLViewer (scene)
43 {}
44 
45 void G4OpenGLImmediateViewer::ProcessView ()
46 {
47  const G4Planes& cutaways = fVP.GetCutawayPlanes();
48  G4bool cutawayUnion = fVP.IsCutaway() &&
49  fVP.GetCutawayMode() == G4ViewParameters::cutawayUnion;
50  size_t nPasses = cutawayUnion? cutaways.size(): 1;
51  for (size_t i = 0; i < nPasses; ++i) {
52 
53  if (cutawayUnion) {
54  double a[4];
55  a[0] = cutaways[i].a();
56  a[1] = cutaways[i].b();
57  a[2] = cutaways[i].c();
58  a[3] = cutaways[i].d();
59  glClipPlane (GL_CLIP_PLANE2, a);
60  glEnable (GL_CLIP_PLANE2);
61  }
62 
63  NeedKernelVisit (); // Always need to visit G4 kernel.
65 
66  if (cutawayUnion) glDisable (GL_CLIP_PLANE2);
67  }
68 }
69 
70 #endif
std::vector< ExP01TrackerHit * > a
Definition: ExP01Classes.hh:33
bool G4bool
Definition: G4Types.hh:79
std::vector< G4Plane3D > G4Planes
void ProcessView()
Definition: G4VViewer.cc:105