ROOT_528-00b_version: tutorials/eve/geom

00001 // @(#)root/eve:$Id: geom_alias.C 27557 2009-02-20 18:22:42Z matevz $
00002 // Author: Matevz Tadel
00003 
00004 // Demonstates usage of geometry aliases - merge ALICE ITS with ATLAS MUON.
00005 
00006 void geom_alias()
00007 {
00008    TEveManager::Create();
00009 
00010    gEve->RegisterGeometryAlias("ALICE", "http://root.cern.ch/files/alice.root");
00011    gEve->RegisterGeometryAlias("ATLAS", "http://root.cern.ch/files/atlas.root");
00012 
00013 
00014    gGeoManager = gEve->GetGeometryByAlias("ALICE");
00015 
00016    TGeoNode* node1 = gGeoManager->GetTopVolume()->FindNode("ITSV_1");
00017    TEveGeoTopNode* its = new TEveGeoTopNode(gGeoManager, node1);
00018    gEve->AddGlobalElement(its);
00019 
00020 
00021    gGeoManager = gEve->GetGeometryByAlias("ATLAS");
00022 
00023    TGeoNode* node2 = gGeoManager->GetTopVolume()->FindNode("OUTE_1");
00024    TEveGeoTopNode* atlas = new TEveGeoTopNode(gGeoManager, node2);
00025    gEve->AddGlobalElement(atlas);
00026 
00027 
00028    gEve->FullRedraw3D(kTRUE);
00029 
00030    // EClipType not exported to CINT (see TGLUtil.h):
00031    // 0 - no clip, 1 - clip plane, 2 - clip box
00032    TGLViewer *v = gEve->GetDefaultGLViewer();
00033    v->GetClipSet()->SetClipType(2);
00034    v->RefreshPadEditor(v);
00035 
00036    v->CurrentCamera().RotateRad(-0.5, -2.4);
00037    v->DoDraw();
00038 }