G4OpenGLImmediateViewer.cc

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00026 //
00027 // $Id$
00028 //
00029 // 
00030 // Andrew Walkden  7th February 1997
00031 // Class G4OpenGLImmediateViewer : Encapsulates the `immediateness' of
00032 //                               an OpenGL view, for inheritance by
00033 //                               derived (X, Xm...) classes.
00034 
00035 #ifdef G4VIS_BUILD_OPENGL_DRIVER
00036 
00037 #include "G4OpenGLImmediateViewer.hh"
00038 #include "G4OpenGLImmediateSceneHandler.hh"
00039 
00040 G4OpenGLImmediateViewer::G4OpenGLImmediateViewer (G4OpenGLImmediateSceneHandler& scene):
00041 G4VViewer (scene, -1),
00042 G4OpenGLViewer (scene)
00043 {}
00044 
00045 void G4OpenGLImmediateViewer::ProcessView ()
00046 {
00047   const G4Planes& cutaways = fVP.GetCutawayPlanes();
00048   G4bool cutawayUnion = fVP.IsCutaway() &&
00049     fVP.GetCutawayMode() == G4ViewParameters::cutawayUnion;
00050   size_t nPasses = cutawayUnion? cutaways.size(): 1;
00051   for (size_t i = 0; i < nPasses; ++i) {
00052 
00053     if (cutawayUnion) {
00054       double a[4];
00055       a[0] = cutaways[i].a();
00056       a[1] = cutaways[i].b();
00057       a[2] = cutaways[i].c();
00058       a[3] = cutaways[i].d();
00059       glClipPlane (GL_CLIP_PLANE2, a);
00060       glEnable (GL_CLIP_PLANE2);
00061     }
00062 
00063     NeedKernelVisit ();  // Always need to visit G4 kernel.
00064     G4VViewer::ProcessView ();
00065 
00066     if (cutawayUnion) glDisable (GL_CLIP_PLANE2);
00067   }
00068 }
00069 
00070 #endif

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